Difference between revisions of "OpenFOAM/C3/Installing-and-running-Gmsh/English"
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− | Script | + | Script : Gautam Sharma |
+ | Narration: Rahul Joshi | ||
− | Keywords: Gmsh. | + | Keywords: Gmsh, OpenFOAM, Geometry, Finite Element Mesh, Video Tutorial.''' ''' |
− | + | ||
{| style="border-spacing:0;" | {| style="border-spacing:0;" | ||
− | | style="border | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Visual Cue</center> |
− | | style="border: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Narration</center> |
|- | |- | ||
− | | style="border-top: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Slide 1 |
− | | style="border-top: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Hello and welcome to the spoken tutorial on '''Installing and running''' '''Gmsh.''' |
|- | |- | ||
− | | style="border-top: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Slide 2 : Learning Objectives |
− | | style="border-top: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| In this tutorial we will learn how to |
* Install and run '''Gmsh''' | * Install and run '''Gmsh''' | ||
* and create a basic geometry in '''Gmsh''' | * and create a basic geometry in '''Gmsh''' | ||
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|- | |- | ||
− | | style="border-top: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Slide 2: Pre-requisite |
− | | style="border-top: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| As a pre-requisite, the user should have basic knowledge about '''mesh'''. |
|- | |- | ||
− | | style="border-top: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Slide 3: |
System Requirement | System Requirement | ||
− | | style="border-top: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| To record this tutorial, I am using |
− | + | ||
− | + | ||
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− | + | ||
+ | * '''Ubuntu Linux''' Operating system version 12.04 and | ||
+ | * '''Gmsh''' version 2.8.5 | ||
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Slide 4: About Gmsh |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Let me introduce you to '''Gmsh'''. |
− | '''Gmsh '''is an automatic 3-D finite element mesh generator, with built-in pre and post-processing facilities. | + | '''Gmsh '''is |
+ | * an automatic 3-D finite element mesh generator, | ||
+ | * with built-in pre and post-processing facilities. | ||
+ | * It's an Open-source software. | ||
− | + | |- | |
− | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Slide 5 : Advantageous in creating complex geometry using blockMesh | |
+ | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| | ||
+ | *It is advantageous in creating complex geometries in '''gmsh''' than '''blockmesh utility''' of '''OpenFOAM'''. | ||
+ | *like '''blades''', '''aerofoil.''' | ||
+ | *'''OpenFOAM '''supports importing mesh from third party meshing software like '''Gmsh.''' | ||
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Installing Gmsh |
− | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Let me show you how to install '''Gmsh'''. | |
− | + | '''Gmsh''' can be installed using '''Synaptic Package Manager'''. | |
− | + | ||
− | + | ||
− | + | ||
− | + | ||
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|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Synaptic Package Manager |
− | + | ||
− | + | ||
− | Synaptic Package Manager | + | |
− | + | ||
Gmsh installed | Gmsh installed | ||
− | |||
− | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|Let me open '''Synaptic Package Manager''' for you. | |
− | Let me open '''Synaptic Package Manager''' for you. | + | |
It will ask for your password. Type in your password. | It will ask for your password. Type in your password. | ||
− | In search box type gmsh. Click on the checkbox in front of | + | In search box type '''gmsh'''. Click on the checkbox in front of '''gmsh'''. |
+ | And click on '''Mark for installation'''. | ||
+ | Click on '''Apply'''. | ||
− | + | Again click on '''Apply'''. | |
+ | This might take some time. | ||
+ | |||
+ | Your '''Gmsh '''is now installed. | ||
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Open browser |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Alternately, you can also download '''Gmsh '''from the '''Gmsh '''website. |
− | Let me open the '''browser | + | Let me open the '''browser''' for you. |
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Type: http://geuz.org/gmsh/ |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| In the address bar, type: '''http://geuz.org/gmsh/''' |
+ | |||
+ | Press '''Enter.''' | ||
+ | |||
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Scroll down to stable Linux release |
Linux 64-bit | Linux 64-bit | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Scroll down to Downloads and select the current stable '''release''' according to your operating system. |
− | I will | + | I will select '''Linux 64-bit'''. Click on '''Save file''' and press '''Ok'''. |
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Go to Home>> Downloads |
Locate the file gmsh-2.8.4-Linux64.tgz | Locate the file gmsh-2.8.4-Linux64.tgz | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| After finishing your download, go to the '''Downloads''' folder. |
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Extract the files |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Here you can see the '''tar file'''. Extract the file. |
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Open Gmsh folder |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Open the folder. |
+ | |||
+ | Go to '''bin''' and click on '''gmsh '''icon. | ||
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Gmsh start screen |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| You can see the '''Gmsh '''start screen. |
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Cube |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Now we will create a cube using '''Gmsh'''. |
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Diagram |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Here you can see the cube with side equal to one unit. |
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Gmsh window |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Let me switch back to '''Gmsh'''. |
+ | |||
+ | |||
+ | On the left hand side, you can see the '''module tree''' with '''Geometry, Mesh''' and '''Solver'''. | ||
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Click Add |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Go to '''Geometry - Elementary entitites - Add.''' |
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Enter the coordinates of the cube |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Click on '''Point. '''A new window will appear. |
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Enter the coordinates |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Enter the '''X,Y '''and '''Z''' '''coordinates''' starting with (0 0 0) and press '''Enter'''. |
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| (1 0 0) |
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Enter the second coordinate as (1 0 0) and press '''Enter.''' |
− | The | + | The third coordinate as (1 1 0) and press '''Enter'''. |
− | The | + | The fourth coordinate as (0 1 0) and press '''Enter'''. |
− | Similarly, enter the '''coordinates''' for the positive z-direction starting with (0 0 1) | + | Similarly, enter the '''coordinates''' for the positive z-direction starting with point (0 0 1) and press '''Enter'''. |
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Coordinates |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| I have entered all the eight coordinates. |
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Move the points |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Use the left mouse click to move the points. |
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| 8 points visible |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| You can see all the 8 '''coordinates '''as points. |
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Join the points by Straight lines |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Now, click on '''Straight line'''. |
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Select start point |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| It wiil ask for '''start point '''. |
+ | Select the first point. | ||
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Select end point |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| It will ask for '''end point '''. |
− | + | Select the second point. | |
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | + | ||
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Straight line |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| A line will be drawn between the two points. |
− | + | Similarly, join all the points. | |
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Press q to abort |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Press '''q''' to abort. |
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− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Define the faces |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Now we will define the faces of the cube. |
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Click on Plane Surface |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Click on '''Plane surface.''' |
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|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Select the edges |
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Press e to end selection | Press e to end selection | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Select the edges of the bottom face first. |
− | You will | + | You will notice that the edge we select, turns in red color. |
− | It will ask for | + | It will ask for '''hole''' boundaries, if any. |
− | Since we don't have ''' | + | Since we don't have any '''hole''' in the boundary, press '''e''' to end the selection. |
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Face appears with centre lines |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| You will notice that the the face will appear with dashed centre lines. |
|- | |- | ||
− | | style="border-top: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Define the top face |
− | | style="border-top: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Now define the top face. |
− | + | ||
− | + | ||
− | + | ||
|- | |- | ||
− | | style="border-top: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Select the remaining faces |
− | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Similarly, define the remaining faces. | |
− | + | ||
− | | style="border-top: | + | |
Line 291: | Line 283: | ||
|- | |- | ||
− | | style="border-top: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Define the Volume |
− | | style="border-top: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Now, we will define the volume of the cube. |
Line 298: | Line 290: | ||
|- | |- | ||
− | | style="border-top: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Select the volume boundary |
− | | style="border-top: | + | | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Select any of the surface boundary and press '''e '''to end selection. |
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Green dot appears at centre |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| A yellow dot appears at the centre of the cube, which represents the volume. |
Line 309: | Line 301: | ||
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Define physical groups |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Now, we will define the physical groups, which will be used in exporting the geometry to '''OpenFOAM.''' |
− | + | ||
− | + | ||
− | + | ||
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Define surface first |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Go to '''Physical Group - Add''' and click on '''Surface.''' |
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Select the surface boundary |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Select the front surface first and press '''e''' to end the selection. |
− | Select the back surface press '''e '''to end the selection. | + | Select the back surface and press '''e '''to end the selection. |
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Select the remaining face |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Similarly, select the remaining surfaces. |
− | I have selected all the surfaces | + | I have selected all the surfaces. Press '''q''' to abort. |
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Define the physical volume. |
− | Click on volume | + | Click on volume. |
− | Click the yellow dot | + | Click on the yellow dot |
Dot appears in red | Dot appears in red | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Now, we'll define the physical '''volume.''' |
− | Click on '''Volume.''' | + | Click on '''Volume.''' It will ask for volume. |
Line 353: | Line 342: | ||
− | The yellow dot will turn red in color. Press '''e '''to end selection. | + | The yellow dot will turn red in color. Press '''e '''to end selection. |
+ | |||
+ | Press '''q''' to abort. | ||
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Save you work |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Our cube is complete. Let us save our work. |
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Click on save as |
Cube.geo | Cube.geo | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Go to '''File''' - '''Save as.''' |
− | We will name our file as '''cube.geo | + | We will name our file as '''cube.geo''' |
− | Note that here '''geo '''stands for | + | Note that here '''geo '''stands for '''geometry'''. |
− | Click | + | Click '''Ok'''. |
+ | |||
+ | |||
+ | Again click '''Ok'''. | ||
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Slide : Assignment |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| This brings us to the end of this tutorial. |
− | As an '''assignment''' | + | As an '''assignment''', create other simple geometry in '''Gmsh''' like cylinder and sphere. |
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Slide : Summary |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| In this tutorial we learnt : |
− | + | * 2 ways to install and run '''Gmsh''' using Synaptic Package Manager and website. | |
− | + | ||
− | * 2 ways to install '''Gmsh''' using Synaptic Package Manager and website. | + | |
* Created a cube using '''Gmsh'''. | * Created a cube using '''Gmsh'''. | ||
− | |||
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Slide : |
About Spoken tutorials | About Spoken tutorials | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| This video summarizes the Spoken Tutorial project. |
− | + | ||
− | + | ||
− | + | ||
− | + | ||
If you do not have good bandwidth, you can download and watch it. | If you do not have good bandwidth, you can download and watch it. | ||
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Slide: |
About Spoken tutorials | About Spoken tutorials | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| We conduct workshops using spoken tutorials and give certificates |
− | + | Please contact us at this URL | |
− | + | ||
− | + | ||
− | + | ||
− | + | ||
contact@spoken-tutorial.org | contact@spoken-tutorial.org | ||
|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Slide: |
Acknowledgement | Acknowledgement | ||
Line 428: | Line 411: | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Spoken Tutorial is funded by NMEICT, MHRD, Government of India. |
− | + | ||
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− | + | ||
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|- | |- | ||
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| About the contributor |
− | | style="border-top:none;border-bottom: | + | | style="border-top:none;border-bottom:1pt solid #000001;border-left:1pt solid #000001;border-right:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| The script was created by Gautam Sharma and this is Rahul Joshi from IIT BOMBAY signing off. |
Thanks for joining. | Thanks for joining. | ||
|} | |} |
Latest revision as of 09:59, 6 January 2015
Tutorial: Installing and runing Gmsh
Script : Gautam Sharma
Narration: Rahul Joshi
Keywords: Gmsh, OpenFOAM, Geometry, Finite Element Mesh, Video Tutorial.
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Slide 1 | Hello and welcome to the spoken tutorial on Installing and running Gmsh. |
Slide 2 : Learning Objectives
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In this tutorial we will learn how to
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Slide 2: Pre-requisite | As a pre-requisite, the user should have basic knowledge about mesh. |
Slide 3:
System Requirement |
To record this tutorial, I am using
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Slide 4: About Gmsh
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Let me introduce you to Gmsh.
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Slide 5 : Advantageous in creating complex geometry using blockMesh |
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Installing Gmsh | Let me show you how to install Gmsh.
Gmsh can be installed using Synaptic Package Manager. |
Synaptic Package Manager
Gmsh installed |
Let me open Synaptic Package Manager for you.
It will ask for your password. Type in your password.
Click on Apply. Again click on Apply.
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Open browser
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Alternately, you can also download Gmsh from the Gmsh website.
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Type: http://geuz.org/gmsh/ | In the address bar, type: http://geuz.org/gmsh/
Press Enter.
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Scroll down to stable Linux release
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Scroll down to Downloads and select the current stable release according to your operating system.
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Go to Home>> Downloads
Locate the file gmsh-2.8.4-Linux64.tgz |
After finishing your download, go to the Downloads folder. |
Extract the files | Here you can see the tar file. Extract the file.
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Open Gmsh folder | Open the folder.
Go to bin and click on gmsh icon. |
Gmsh start screen | You can see the Gmsh start screen. |
Cube | Now we will create a cube using Gmsh. |
Diagram | Here you can see the cube with side equal to one unit. |
Gmsh window | Let me switch back to Gmsh.
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Click Add | Go to Geometry - Elementary entitites - Add. |
Enter the coordinates of the cube | Click on Point. A new window will appear. |
Enter the coordinates | Enter the X,Y and Z coordinates starting with (0 0 0) and press Enter. |
(1 0 0)
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Enter the second coordinate as (1 0 0) and press Enter.
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Coordinates | I have entered all the eight coordinates. |
Move the points | Use the left mouse click to move the points. |
8 points visible | You can see all the 8 coordinates as points. |
Join the points by Straight lines | Now, click on Straight line. |
Select start point | It wiil ask for start point .
Select the first point. |
Select end point | It will ask for end point .
Select the second point. |
Straight line | A line will be drawn between the two points.
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Press q to abort | Press q to abort. |
Define the faces | Now we will define the faces of the cube. |
Click on Plane Surface | Click on Plane surface.
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Select the edges
appear in red
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Select the edges of the bottom face first.
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Face appears with centre lines | You will notice that the the face will appear with dashed centre lines. |
Define the top face | Now define the top face. |
Select the remaining faces | Similarly, define the remaining faces.
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Define the Volume | Now, we will define the volume of the cube.
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Select the volume boundary | Select any of the surface boundary and press e to end selection. |
Green dot appears at centre | A yellow dot appears at the centre of the cube, which represents the volume.
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Define physical groups | Now, we will define the physical groups, which will be used in exporting the geometry to OpenFOAM. |
Define surface first | Go to Physical Group - Add and click on Surface. |
Select the surface boundary | Select the front surface first and press e to end the selection.
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Select the remaining face | Similarly, select the remaining surfaces.
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Define the physical volume.
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Now, we'll define the physical volume.
Press q to abort. |
Save you work | Our cube is complete. Let us save our work. |
Click on save as
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Go to File - Save as.
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Slide : Assignment | This brings us to the end of this tutorial.
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Slide : Summary
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In this tutorial we learnt :
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Slide :
About Spoken tutorials |
This video summarizes the Spoken Tutorial project.
If you do not have good bandwidth, you can download and watch it. |
Slide:
About Spoken tutorials |
We conduct workshops using spoken tutorials and give certificates
Please contact us at this URL contact@spoken-tutorial.org |
Slide:
Acknowledgement
|
Spoken Tutorial is funded by NMEICT, MHRD, Government of India. |
About the contributor | The script was created by Gautam Sharma and this is Rahul Joshi from IIT BOMBAY signing off.
Thanks for joining. |