Difference between revisions of "OpenFOAM/C3/Installing-and-running-Gmsh/English"
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| − | | 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 to | + | | 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''' | ||
| − | |||
|- | |- | ||
| 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:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Slide 2: Pre-requisite | ||
| − | | 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: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'''. |
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* '''Ubuntu Linux''' Operating system version 13.10. and | * '''Ubuntu Linux''' Operating system version 13.10. and | ||
* '''Gmsh''' version 2.8.4 | * '''Gmsh''' version 2.8.4 | ||
| − | |||
| − | |||
|- | |- | ||
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| − | | 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. | + | | 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;"| 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. | + | | 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: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'''. | ||
| − | |||
|- | |- | ||
| − | | 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;"| | + | | 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 | ||
| − | |||
| − | |||
| − | Let me open '''Synaptic Package Manager''' for you. | + | | 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. |
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'''. | ||
| − | + | Click on '''Apply'''. | |
| + | This might take some time. | ||
| + | |||
| + | Your '''Gmsh '''is now installed. | ||
|- | |- | ||
| Line 98: | Line 98: | ||
| − | Let me open the '''browser | + | Let me open the '''browser''' for you. |
|- | |- | ||
| 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: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: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/ | + | | 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.''' | ||
| + | |||
|- | |- | ||
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Linux 64-bit | Linux 64-bit | ||
| − | | 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 and | + | | 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'''. |
|- | |- | ||
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|- | |- | ||
| 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: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: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. | + | | 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: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: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: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: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: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: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: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. | | 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. | ||
| − | |||
Let me go back to the slides. | Let me go back to the slides. | ||
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|- | |- | ||
| 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: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: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;"| On the left hand, you can see the module tree with '''Geometry, Mesh''' and '''Solver''' | + | | 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, you can see the '''module tree''' with '''Geometry, Mesh''' and '''Solver'''. | ||
|- | |- | ||
| 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: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: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 | + | | 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: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: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: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. | + | | 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: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;"| | + | | 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 coordinates as (1 0 0) and press '''Enter.''' |
| − | The | + | The third coordinate as (1 1 0) press '''Enter'''. |
| − | The | + | The fourth coordinate as (0 1 0) 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 (0 0 1) press '''Enter'''. |
| Line 192: | Line 199: | ||
|- | |- | ||
| 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: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: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 | + | | 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: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: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: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 | + | | 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'''. |
|- | |- | ||
| 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: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: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 | + | | 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: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: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: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 '''end point ''' | + | | 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 '''end point '''. |
| + | |||
| + | Select the second point. | ||
|- | |- | ||
| Line 219: | Line 229: | ||
| − | Similarly join all the points | + | Similarly, join all the points. |
|- | |- | ||
| 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 all the points | | 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 all the points | ||
| − | | 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;"| | + | | 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 joined all the points. |
| − | + | ||
| − | + | ||
| − | I have joined all the points. | + | |
|- | |- | ||
| Line 259: | Line 266: | ||
| − | 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: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: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: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 the the face | + | | 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 the the face will appear with dashed centre lines. |
|- | |- | ||
| Line 298: | Line 305: | ||
|- | |- | ||
| 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: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: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 | + | | 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 305: | Line 312: | ||
|- | |- | ||
| 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: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: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 | + | | 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: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: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: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 | + | | 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: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: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: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 | + | | 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. Press '''e''' to end the selection. |
| − | Select the back surface | + | Select the back surface. Press '''e '''to end the selection. |
|- | |- | ||
| Line 326: | Line 330: | ||
| − | I have selected all the surfaces | + | I have selected all the surfaces. Press '''q''' to abort. |
|- | |- | ||
| Line 342: | Line 346: | ||
| − | Click on '''Volume.''' | + | Click on '''Volume.''' It will ask for volume. |
| Line 348: | Line 352: | ||
| − | 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: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: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: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 | + | | 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. |
|- | |- | ||
| Line 359: | Line 363: | ||
Cube.geo | Cube.geo | ||
| − | | 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''' | + | | 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.''' |
| Line 365: | Line 369: | ||
| − | Note that here '''geo '''stands for | + | Note that here '''geo '''stands for '''geometry'''. |
| − | Click | + | Click '''Ok'''. |
| + | |||
| + | Click '''Ok'''. | ||
|- | |- | ||
| 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: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: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;"| | + | | 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 the slides. |
| − | As an '''assignment''' | + | This brings us to the end of the tutorial. |
| + | |||
| + | |||
| + | As an '''assignment''' create other simple geometry in '''Gmsh''' like cylinder and sphere. | ||
|- | |- | ||
| Line 385: | Line 394: | ||
| − | * 2 ways to install '''Gmsh''' using Synaptic Package Manager and website. | + | * 2 ways to install and run '''Gmsh''' using Synaptic Package Manager and website. |
* Created a cube using '''Gmsh'''. | * Created a cube using '''Gmsh'''. | ||
| − | |||
Revision as of 22:00, 7 August 2014
Tutorial: Installing and runing Gmsh
Script and Narration: Gautam Sharma
Keywords: Gmsh.
| |
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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 |
|
| Installing Gmsh | Let me show you how to install Gmsh.
Gmshcan be installed using Synaptic Package Manager.
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| 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. Click on Apply.
|
| 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.
|
| 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.
|
| 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.
|
| Open Gmsh folder | Open the folder.
Go to bin and click on gmsh icon. |
| Gmsh start screen | You can see the Gmsh start screen.
Let me go back to the slides. |
| 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.
|
| 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)
|
Enter the second coordinates as (1 0 0) and press Enter.
|
| 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 wiil ask for end point .
Select the second point. |
| Straight line | A line will be drawn between the two points.
|
| Join all the points | I have joined all the points. |
| 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.
|
| Select the edges
appear in red
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Select the edges of the bottom face first.
|
| Face appears with centre lines | You will notice the the face will appear with dashed centre lines. |
| Define the top face | Now define the top face.
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| Select the remaining faces
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Similarly, define the remaining faces.
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| Define the Volume | Now, we will define the volume of the cube.
|
| 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.
|
| 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. Press e to end the selection.
|
| Select the remaining face | Similarly, select the remaining surfaces.
|
| Define the volume
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Now, we'll define the physical volume.
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| Save you work | Our cube is complete. Let us save our work. |
| Click on save as
|
Go to File - Save as.
Click Ok. |
| Slide : Assignment | Let me switch back to the slides.
|
| Slide : Summary
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In this tutorial we learnt :
|
| Slide :
About Spoken tutorials |
Watch the video available at this URL:
http://spoken-tutorial.org/What_is_a_Spoken_Tutorial It summarizes the Spoken Tutorial project. If you do not have good bandwidth, you can download and watch it. |
| Slide:
About Spoken tutorials |
The Spoken Tutorial Project Team
-Conducts workshops using spoken tutorials -Gives certificates to those who pass an online test -For more details, please write to contact@spoken-tutorial.org |
| Slide:
Acknowledgement
|
Spoken Tutorials are part of Talk to a Teacher project,
It is supported by the National Mission on Education through ICT, MHRD, Government of India. This project is coordinated by http://spoken-tutorial More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro |
| About the contributor | This is Gautam Sharma from IIT BOMBAY signing off.
Thanks for joining. |
