Difference between revisions of "OpenFOAM/C3/Using-Template-files-in-PyFoam/English"
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| style="border:0.25pt solid #000000;padding:0cm;"| Show Slide : Learning Objective | | style="border:0.25pt solid #000000;padding:0cm;"| Show Slide : Learning Objective | ||
| style="border:0.25pt solid #000000;padding:0cm;"| In this tutorial we will: | | style="border:0.25pt solid #000000;padding:0cm;"| In this tutorial we will: | ||
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* Understand the function of '''PyFoam Utilities''' | * Understand the function of '''PyFoam Utilities''' | ||
* Create and use template files | * Create and use template files | ||
* Use '''PyFoamFromTemplate.py '''for solving the '''supersonic flow over wedge''' | * Use '''PyFoamFromTemplate.py '''for solving the '''supersonic flow over wedge''' | ||
− | + | *We can run this for different '''wedge angles '''using '''template '''files. | |
− | We can run this for different '''wedge angles '''using '''template '''files. | + | |
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| style="border:0.25pt solid #000000;padding:0cm;"| Show Slide : System requirement | | style="border:0.25pt solid #000000;padding:0cm;"| Show Slide : System requirement | ||
| style="border:0.25pt solid #000000;padding:0cm;"| To record this tutorial I am using | | style="border:0.25pt solid #000000;padding:0cm;"| To record this tutorial I am using | ||
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* '''Ubuntu Linux '''Operating System 14.04 | * '''Ubuntu Linux '''Operating System 14.04 | ||
* '''OpenFOAM''' 2.3.0 | * '''OpenFOAM''' 2.3.0 | ||
* '''PyFoam-0.6.5''' | * '''PyFoam-0.6.5''' | ||
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| style="border:0.25pt solid #000000;padding:0cm;"| Show slide : Prerequisite | | style="border:0.25pt solid #000000;padding:0cm;"| Show slide : Prerequisite | ||
| style="border:0.25pt solid #000000;padding:0cm;"| To practice this tutorial the user should have : | | style="border:0.25pt solid #000000;padding:0cm;"| To practice this tutorial the user should have : | ||
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* Basic Knowledge of using '''Linux terminal''' | * Basic Knowledge of using '''Linux terminal''' | ||
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| style="border:0.25pt solid #000000;padding:0cm;"| What are '''template '''files? | | style="border:0.25pt solid #000000;padding:0cm;"| What are '''template '''files? | ||
− | '''Template '''files are used to generate '''OpenFOAM '''files like | + | '''Template '''files are used to generate '''OpenFOAM '''files like '''blockMeshDict or controlDict''' |
− | + | ||
− | '''blockMeshDict or controlDict''' | + | |
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* Any line beginning with '''$$ '''is a '''Python program '''line. | * Any line beginning with '''$$ '''is a '''Python program '''line. | ||
* It will be executed by '''Python''' | * It will be executed by '''Python''' | ||
− | * Any variable can be substituted in the file by using the syntax | + | * Any variable can be substituted in the file by using the syntax '''| -varname - |''' |
− | + | ||
− | '''| -varname - |''' | + | |
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'''cp -r Wedge15Ma5 ''' | '''cp -r Wedge15Ma5 ''' | ||
+ | |||
Type the path of '''your OpenFOAM directory''' and press '''Enter.''' | Type the path of '''your OpenFOAM directory''' and press '''Enter.''' | ||
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| style="border:0.25pt solid #000000;padding:0cm;"| '''Cd OpenFOAM/Wedge5 M15''' | | style="border:0.25pt solid #000000;padding:0cm;"| '''Cd OpenFOAM/Wedge5 M15''' | ||
− | | style="border:0.25pt solid #000000;padding:0cm;"| On the '''terminal, '''type the path for ''' | + | | style="border:0.25pt solid #000000;padding:0cm;"| On the '''terminal, '''type the path for '''Wedge15Ma5 folder '''inside '''OpenFOAM directory.''' |
− | + | ||
− | '''OpenFOAM directory.''' | + | |
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| style="border:0.25pt solid #000000;padding:0cm;"| Type '''cd constant/polyMesh/bl ockMeshDict''' | | style="border:0.25pt solid #000000;padding:0cm;"| Type '''cd constant/polyMesh/bl ockMeshDict''' | ||
− | | style="border:0.25pt solid #000000;padding:0cm;"| Type the '''path '''for '''blockMeshDict file '''inside '''polyMesh directory '''inside | + | | style="border:0.25pt solid #000000;padding:0cm;"| Type the '''path '''for '''blockMeshDict file '''inside '''polyMesh directory '''inside '''constant.''' |
− | + | ||
− | '''constant.''' | + | |
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'''ate''' | '''ate''' | ||
− | | style="border-top:0.25pt solid #000000;border-bottom:none;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;"| Switch back to the terminal | + | | style="border-top:0.25pt solid #000000;border-bottom:none;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;"| Switch back to the '''terminal'''. |
− | Copy your '''blockMeshDict '''file into a file called | + | Copy your '''blockMeshDict '''file into a file called '''blockMeshDict.template''' |
− | + | ||
+ | Type the following- | ||
'''cp -r blockMeshDict blockMeshDict.template''' | '''cp -r blockMeshDict blockMeshDict.template''' | ||
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| style="border:0.25pt solid #000000;padding:0cm;"| gedit blockMeshDict.templat e | | style="border:0.25pt solid #000000;padding:0cm;"| gedit blockMeshDict.templat e | ||
− | | style="border:0.25pt solid #000000;padding:0cm;"| Open the blockMeshDict.template file using gedit | + | | style="border:0.25pt solid #000000;padding:0cm;"| Open the '''blockMeshDict.template''' file using '''gedit'''. |
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| style="border:0.25pt solid #000000;padding:0cm;"| Show slide : Template file syntax | | style="border:0.25pt solid #000000;padding:0cm;"| Show slide : Template file syntax | ||
− | | style="border:0.25pt solid #000000;padding:0cm;"| | + | | style="border:0.25pt solid #000000;padding:0cm;"| Add the following lines above '''convertToMeters'''. |
− | + | ||
+ | |- | ||
+ | | style="border:0.25pt solid #000000;padding:0cm;"| Edit '''blockMeshDict.template''' | ||
+ | | style="border:0.25pt solid #000000;padding:0cm;"| Any line preceded with '''$$ ''' is a '''Python ''' line, and will be interpreted and executed by '''Python''' | ||
'''$$import math''' | '''$$import math''' | ||
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'''$$y_coord <nowiki>=</nowiki> 0.3048* math . tan ( thetaRadians )''' | '''$$y_coord <nowiki>=</nowiki> 0.3048* math . tan ( thetaRadians )''' | ||
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| style="border:0.25pt solid #000000;padding:0cm;"| | | style="border:0.25pt solid #000000;padding:0cm;"| | ||
− | | style="border:0.25pt solid #000000;padding:0cm;"| Now, let's create a blank file | + | | style="border:0.25pt solid #000000;padding:0cm;"| Now, let's create a blank file. |
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| style="border:0.25pt solid #000000;padding:0cm;"| Press Ctrl+S and close | | style="border:0.25pt solid #000000;padding:0cm;"| Press Ctrl+S and close | ||
− | | style="border:0.25pt solid #000000;padding:0cm;"| Save and close the | + | | style="border:0.25pt solid #000000;padding:0cm;"| Save and close the file. |
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| style="border:0.25pt solid #000000;padding:0cm;"| Show slide : Running PyFoam command | | style="border:0.25pt solid #000000;padding:0cm;"| Show slide : Running PyFoam command | ||
− | | style="border:0.25pt solid #000000;padding:0cm;"| We have to run the template command now. | + | | style="border:0.25pt solid #000000;padding:0cm;"| We have to run the '''template command''' now. |
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| style="border:0.25pt solid #000000;padding:0cm;"| Type this command in '''terminal '''>> press '''Enter''' | | style="border:0.25pt solid #000000;padding:0cm;"| Type this command in '''terminal '''>> press '''Enter''' | ||
| style="border:0.25pt solid #000000;padding:0cm;"| Type this command in '''terminal '''and press '''Enter''' | | style="border:0.25pt solid #000000;padding:0cm;"| Type this command in '''terminal '''and press '''Enter''' | ||
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* 2 new files are generated | * 2 new files are generated | ||
− | * the | + | * the '''blockMeshDict''' |
− | * and ''' | + | * and a '''Python '''file is also generated. |
− | + | ||
− | + | ||
|- | |- | ||
− | | style="border:0.25pt solid #000000;padding:0cm;"| Point to the '''Python''' | + | | style="border:0.25pt solid #000000;padding:0cm;"| Point to the '''Python''' file. |
− | + | ||
− | file. | + | |
| style="border:0.25pt solid #000000;padding:0cm;"| Do not edit the '''Python '''file. | | style="border:0.25pt solid #000000;padding:0cm;"| Do not edit the '''Python '''file. | ||
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'''gedit blockMeshDict''' | '''gedit blockMeshDict''' | ||
− | | style="border:0.25pt solid #000000;padding:0cm;"| | + | | style="border:0.25pt solid #000000;padding:0cm;"| Open the '''blockMeshDict '''file by typing - |
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* '''rhoCentralFoam''' | * '''rhoCentralFoam''' | ||
* visualize the results using '''Paraview.''' | * visualize the results using '''Paraview.''' | ||
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| style="border:0.25pt solid #000000;padding:0cm;"| Show slide : Assignment | | style="border:0.25pt solid #000000;padding:0cm;"| Show slide : Assignment | ||
− | | style="border:0.25pt solid #000000;padding:0cm;"| As an assignment, use the following '''wedge angles '''and run the '''template''' | + | | style="border:0.25pt solid #000000;padding:0cm;"| As an assignment, use the following '''wedge angles '''and run the '''template''' commands. |
− | + | ||
− | commands. | + | |
− | + | ||
- '''0deg, 5 deg, 20 deg, 25 deg''' | - '''0deg, 5 deg, 20 deg, 25 deg''' | ||
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| style="border:0.25pt solid #000000;padding:0cm;"| Let us summarize. | | style="border:0.25pt solid #000000;padding:0cm;"| Let us summarize. | ||
− | + | In this tutorial, we learnt about '''PyFoam Template Files''' | |
− | In this tutorial, we learnt about '''PyFoam Template''' | + | |
− | + | ||
We also learnt to- | We also learnt to- | ||
− | # | + | # Create and use '''template files''' |
# and using the '''PyFoamFromTemplate.py '''command | # and using the '''PyFoamFromTemplate.py '''command | ||
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|- | |- |
Latest revision as of 10:38, 2 March 2017
Tutorial 21: C2
Title : Using Template files in PyFoam Script : Anmol Sahoo, Rahul Joshi Narration : Rahul Joshi
Keywords : OpenFOAM, PyFoam, Python, Template, supersonic flow, wedge
Visual Cue | |
Show slide : Title | Hello and welcome to the spoken tutorial on Using Template files in PyFoam. |
Show Slide : Learning Objective | In this tutorial we will:
|
Show Slide : System requirement | To record this tutorial I am using
|
Show slide : Prerequisite | To practice this tutorial the user should have :
If not, please refer to the spoken tutorial series on Linux and OpenFOAM. |
Show slide : Template Files | What are template files?
Template files are used to generate OpenFOAM files like blockMeshDict or controlDict
|
Show slide : Syntax of Template files | A template file should be an OpenFOAM file, with the following -
|
Show slide : Using a template file | The following steps should be followed to use a template file :
|
Show slide : Creating a template file | Template file will be created for blockMeshDict.
We will use the supersonic flow over a wedge as an example case. The case file is available in the rhoCentralFoam solver. |
Type run/tutorials/compres sible/rhoCentralFoam | Open the terminal.
|
Type
cp -r Wedge15Ma5 /home/fossee/OpenFOAM/ |
Now copy the Wedge15Ma5 case directory into OpenFOAM directory
by typing cp -r Wedge15Ma5 Type the path of your OpenFOAM directory and press Enter. |
Cd OpenFOAM/Wedge5 M15 | On the terminal, type the path for Wedge15Ma5 folder inside OpenFOAM directory. |
Type cd constant/polyMesh/bl ockMeshDict | Type the path for blockMeshDict file inside polyMesh directory inside constant. |
Type gedit blockMeshDict | Open the blockMeshDict file in any editor of your choice. |
Point to the vertices section | We can see the vertices section. |
Show slide : vertices to
be changed |
We need to calculate the co-ordinates of the end points of the slope.
Based on the angle, change the following lines ( 0.3048 0.081670913853 -0.005) ( 0.3048 0.081670913853 0.005) |
On the terminal type
cp -r blockMeshDict blockMeshDict.templ ate |
Switch back to the terminal.
Copy your blockMeshDict file into a file called blockMeshDict.template
cp -r blockMeshDict blockMeshDict.template |
gedit blockMeshDict.templat e | Open the blockMeshDict.template file using gedit. |
Show slide : Template file syntax | Add the following lines above convertToMeters. |
Edit blockMeshDict.template | Any line preceded with $$ is a Python line, and will be interpreted and executed by Python
$$import math $$thetaDegrees = 10.0 $$thetaRadians = math . radians ( thetaDegrees ) $$y_coord = 0.3048* math . tan ( thetaRadians ) |
Show slide : Template file syntax | Modify the vertices entry as
|
Python variables assigned in the template file, should be substituted at any location in the file.
| |
Highlight or point to the changes | We can see the changes made into this file. |
Now, let's create a blank file. | |
Type gedit templateFileConst | On the terminal, type gedit templateFileConst and press Enter. |
templateFileConst | Create a dummy entry inside it by typing
|
Press Ctrl+S and close | Save and close the file. |
Show slide : Running PyFoam command | We have to run the template command now.
--output=./blockMeshDict --values-dictionary=templateFileConst --allow-exec-instead-of-assignment |
Type this command in terminal >> press Enter | Type this command in terminal and press Enter |
Point to blockMeshDict and a python file | We can see that
|
Point to the Python file. | Do not edit the Python file. |
On the terminal type
gedit blockMeshDict |
Open the blockMeshDict file by typing - |
gedit blockMeshDict and press Enter. | |
Point to wedge angle | We had changed the wedge angle from 15 deg to 10 deg. |
Point to end points | The end points of the slope have also changed. |
Show slide :Running the case file | We can now run the case file by executing the OpenFOAM commands
|
Show slide : Assignment | As an assignment, use the following wedge angles and run the template commands.
- 0deg, 5 deg, 20 deg, 25 deg |
Show slide : Summary | Let us summarize.
In this tutorial, we learnt about PyFoam Template Files We also learnt to-
|
Show Slide
|
Please post your timed queries in this forum. |
Show Slide
|
Please post your general queries on OpenFOAM in this forum. |
Show Slide Textbook Companion | The FOSSEE team coordinates the TBC project. |
Show Slide Acknowledgement | The Spoken Tutorial Project is funded by NMEICT, MHRD, Govt. of India
|
Thank You | This is Rahul Joshi from IIT Bombay signing off. Thanks for watching |