Difference between revisions of "OpenFOAM/C2/Creating-curved-geometry-in-OpenFOAM/English"
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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt: | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt: | ||
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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an Assignment | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an Assignment | ||
Revision as of 11:08, 30 May 2019
Tutorial: Creating curved geometry in OpenFOAM.
Script and Narration: Rahul Joshi
Keywords: Video tutorial, CFD, Flow over cylinder, edges, blocks.
| Visual Cue | Narration |
| Slide 1 | Hello and welcome to the spoken tutorial on creating Curved geometry in OpenFOAM |
| Slide 2 : Learning Objectives | In this tutorial I will show you
|
| Slide 3:
System Requirement |
To record this tutorial
|
| Slide 4: System Requirement | The tutorials were recorded using the versions specified in previous slide
Subsequently the tutorials were edited to latest versions To install latest system requirements go to Installation Sheet
|
| Slide 5:
|
We will create a geometry for flow over cylinder.
|
| Open the lid driven cavity blockMeshDict file
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Open a blockMeshDict file of the previous tutorial
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| Now Create a new blockMeshDict file
| |
| On the desktop
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Now Right click > create document > empty file |
| Name this as blockMeshDict | name this as blockMeshDict.
|
| Copy the blockMeshDict of Lid driven cavity file from line 0 to line
convert to meters |
Now you can copy the initial few lines from the lid driven cavity upto convertTometers |
| Copy these lines | Go up copy this upto convertToMeters |
| Paste in the new blockMeshDict file | Copy this and paste it in the new blockMeshDict file |
| Change the geometry to point one to one | Change the convert to meters from point one to one |
| Geometry is in meters | As our geometry is in meters we will keep this as one |
| Press enter | Now press enter ,
|
| Refer to the figure of flow over cylinder in slide 4
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After this you need to enter the co-ordinates of the geometry in vertices
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| Type vertices after convertTometers | Now type vertices in the blockMeshDict file and press enter |
| Insert a open bracket
| |
| Enter the co-ordinates as shown in the diagram | Now enter the co-ordinates of points as shown in the diagram. |
| Let me switch back to the slides | |
| Refer to the next slide for half semi-circle | For explanation I will use the right half of the semi-circle |
| current blockMeshDict file | Enter the values for the points in the figure starting from 0
|
| leave some space and enter co-ordinates of point 0 | |
| Point 0 - Insert (0.5 0 0) | Open close bracket and enter (0.5 (space) 0 (space) 0) |
| Again leave some space , open close bracket | |
| Point 1- Insert (1 0 0) | Enter co-ordinates for point 1 (1 (space) 0 (space) 0)
|
| leave two vertical spaces ,
| |
| leave some space and enter co-ordinate for the point number 4 | |
| Point 4 – Insert (0.707 0.707 0) | Open close bracket, enter (0.707 (space) 0.707 (space) 0) |
| Press enter
| |
| Point 5 -Insert (0.353 0.353 0) | Enter the co-ordinates for point 5
|
| Now leave 4 vertical spaces and | |
| Enter co-ordinates for point number 9 | |
| Vertical spaces | 1 2 3 4 , again press enter
|
| Point 9 – Insert (0 1 0) | Enter (0 (space) 1 (space) 0), press enter |
| Leave some space
| |
| Point 10 -Insert (0 0.5 0) | Open close bracket (0 (space) 0.5 (space) 0) and press enter |
| Remaining part of the semi-circle
|
Similarly enter the co-ordinates for remaining points in the geometry.
|
| In blockMeshDict file type blocks | Now Type blocks and press enter
|
| Let me switch back to the slides | |
| Slide showing blocks | Block numbers are circled as shown in the figure |
| Now let me switch back to the blockMeshDict file | |
| Enter the type of block here | Leave some space
|
| Enter points for blocks | Now enter the points for the blocks
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| SimpleGrading (1 1 1) | ths simple grading can be kept as (1 1 1)
|
| Refer to the previous tutorial on simple geometry in openfoam | For creating the blocks please refer to the tutorial
|
| Insert close bracket and
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Insert a close bracket
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| Type edges | in the next line type edges and press enter
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| Here you need to enter the points which are the end points of the arcs | |
| Enter the arc points | Leave some space and type arc and leave some space
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| Insert end points of the arc
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In this insert the end points of the arc
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| Leave some space
| |
| In brackets enter the co-ordinate of any intermediate point in between the two arc points.
| |
| Slide: for arcs | In the figure you can see that you have to pick up a point
|
| In this geometry I have picked up right half of the circle | |
| Slide shwoing trignometric relations
Sin(theta) and cos(theta) relations |
Using simple geometric relations
|
| Repeat the above procedure for the remaining semi-circle | Similarly you can repeat the procedure for rest of the semi-circle geometry |
| Now let me switch back to the blockMeshDict file
| |
| Note that there are more number of arcs in this example | |
| Insert a close bracket
| |
| In the next line after arcs
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Enter the boundary patches after arcs
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| Enter boundary | Enter boundary
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| Type mergePatchPairs
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In the next line type mergePatchPairs
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| Press enter
| |
| Since there are no patches to be merged this can be kept empty
| |
| Slide :
|
Let me switch back to the slides
|
| Press Ctrl+Alt+t keys | Open a Command terminal |
| Type run and press enter
cd tutorials and press enter cd basic and press enter cd potentialFoam and press enter cd cylinder and press enter |
In the command terminal type the path for your case file |
| I have already set the path for the tutorial case of flow over cylinder | |
| Type blockMesh and press enter | In the terminal type blockMesh for meshing the geometry and press enter
|
| Slide: For OpenFOAM v 5.0 | To open cylinder case directory, type the following in your run folder:
$cd tutorials/basic/potentialFoam/cylinder To run Allrun script file, type: $./Allrun This will run blockMesh and potentialFoam commands
|
| Type paraFoam and press enter | Now Type paraFoam in the terminal
|
| Let me drag this to the capture area | |
| In the object inspector menu click APPLY button | Now on the left side of object inspector menu click Apply
|
| Scroll down the Object inspector menu | |
| Check and uncheck the mesh field box | Check and uncheck the Mesh field box |
| Demo | You can see different regions of the geometry.
|
| For wireframe of the geometry
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On top of active variable control menu in the drop down menu
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| You can see the wireframe model of the geometry
| |
| Slide: Summary | In this tutorial we learnt:
How to create a curved geometry.
|
| Slide: Assignment | As an Assignment
|
| Slide 8:
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 9:
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.com |
| Slide : Forum to answer questions | Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question Explain your question briefly Someone from the FOSSEE team will answer them. Please visit http://forums.spoken-tutorial.org/ |
| Slide : Forum to answer questions | Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software? Please visit the FOSSEE forum http://forums.fossee.in/ Choose the Software and post your question |
| Slide : Lab Migration project | We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM For more details visit this site: http://cfd.fossee.in/ |
| Slide : Case Study project | We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this For more details visit this site: http://cfd.fossee.in/ |
| Slide 10:
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. More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro |
| About the contributor | This is Rahul Joshi from IIT BOMBAY signing off. Thanks for joining |
