Pratik kamble: Created page with "{| border=1 | '''Time''' | '''Narration''' |- | 00:01 | Hello and welcome to the spoken tutorial on '''Using Template files in PyFoam.''' |- | 00:07 | In this tutorial we wi..."

2017-09-05T10:22:27Z

Created page with "{| border=1 | '''Time''' | '''Narration''' |- | 00:01 | Hello and welcome to the spoken tutorial on '''Using Template files in PyFoam.''' |- | 00:07 | In this tutorial we wi..."

New page

{| border=1
| '''Time'''
| '''Narration'''

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| 00:01
| Hello and welcome to the spoken tutorial on '''Using Template files in PyFoam.'''

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| 00:07
| In this tutorial we will: Understand the function of '''PyFoam Utilities'''

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| 00:13
| Create and use template files

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| 00:17
| Use '''PyFoamFromTemplate dot py '''for solving the '''supersonic flow over wedge'''

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| 00:24
| We can run this for different '''wedge angles '''using '''template '''files.

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| 00:29
| To record this tutorial I am using '''Ubuntu Linux '''Operating System 14.04

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| 00:36
| '''OpenFOAM''' 2.3.0
'''PyFoam-0.6.5'''

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| 00:42
| To practice this tutorial the user should have : Basic Knowledge of using '''Linux terminal'''

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| 00:49
| Experience of running and analyzing '''OpenFOAM '''cases

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| 00:54
| If not, please refer to the spoken tutorial series on '''Linux '''and '''OpenFOAM'''.

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| 01:00
| What are '''template '''files?

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| 01:03
| '''Template '''files are used to generate '''OpenFOAM '''files like '''blockMeshDict or controlDict'''

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| 01:10
| '''Template '''files can be programmed, hence we can procedurally generate data.

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| 01:16
| A '''template '''file should be an '''OpenFOAM '''file, with the following -

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| 01:22
| Any line beginning with '''$$ '''is a '''Python program '''line.

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| 01:28
| It will be executed by '''Python'''

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| 01:31
| Any variable can be substituted in the file by using the syntax '''vertical pipe dash variable name dash vertical pipe'''

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| 01:42
| The following steps should be followed to use a '''template '''file :

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| 01:47
| First copy an existing file

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| 01:50
| After this create a '''template '''file

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| 01:54
| Then run '''PyFoamFromTemplate dot py'''

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| 01:58
| '''Template '''file will be created for '''blockMeshDict.'''

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| 02:02
| We will use the '''supersonic flow '''over a wedge as an example case. The case file is available in the '''rhoCentralFoam solver.'''

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| 02:12
| Open the '''terminal'''. Type the '''path '''for the '''rhoCentralFoam '''inside '''compressible solvers.'''

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| 02:22
| Now copy the '''Wedge15Ma5 case directory '''into '''OpenFOAM directory''' by typing '''cp space minus r space Wedge15Ma5 ''' space type the path of '''your OpenFOAM directory''' and press '''Enter.'''

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| 02:46
| On the '''terminal, '''type the path for '''Wedge15Ma5 folder '''inside '''OpenFOAM directory.'''

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| 02:53
| Type the '''path '''for '''blockMeshDict file '''inside '''polyMesh directory '''inside '''constant.'''

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| 03:00
| Open the '''blockMeshDict '''file in any editor of your choice.

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| 03:06
| We can see the '''vertices '''section.

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| 03:09
| We need to calculate the '''co-ordinates '''of the end points of the '''slope'''.

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| 03:14
| Based on the '''angle, '''change the following lines

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| 03:19
| Switch back to the '''terminal'''.

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| 03:22
| Copy your '''blockMeshDict '''file into a file called '''blockMeshDict dot template'''

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| 03:29
| Type the following- '''cp space minus r space blockMeshDict space blockMeshDict dot template'''

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| 03:40
| Open the '''blockMeshDict dot template''' file using '''gedit'''.

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| 03:46
| Add the following lines above '''convertToMeters'''.

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| 03:51
| Any line preceded with '''$$ (dollar dollar) ''' is a '''Python ''' line, and will be interpreted and executed by '''Python'''

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| 04:02
| Modify the '''vertices '''entry as

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| 04:06
| '''Python variables '''assigned in the '''template '''file, should be substituted at any location in the file.

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| 04:14
| To do so, use ''' vertical pipe dash variable name dash vertical pipe '''in the file.

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| 04:22
| We can see the changes made into this file.

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| 04:26
| Now, let's create a blank file.

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| 04:30
| On the '''terminal''', type '''gedit templateFileConst '''and press '''Enter.'''

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| 04:40
| Create a dummy entry inside it by typing '''dummy space 1.0 semicolon '''

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| 04:48
| A dummy entry is mandatory.

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| 04:51
| An external '''dict '''has to be provided with any '''constant '''that is to be used in the '''template '''file.

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| 04:59
| Save and close the file.

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| 05:04
| We have to run the '''template command''' now.

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| 05:08
| Type this command in '''terminal '''and press '''Enter'''

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| 05:15
| We can see that 2 new files are generated the '''blockMeshDict''' and a '''Python '''file is also generated.

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|05:24
| Do not edit the '''Python '''file.

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|05:27
| Open the '''blockMeshDict '''file by typing '''gedit space blockMeshDict '''and press '''Enter.'''

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| 05:36
| We had changed the '''wedge angle '''from '''15 deg '''to '''10 deg.'''

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| 05:41
| The end points of the '''slope '''have also changed.

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| 05:45
| We can now run the '''case '''file by executing the '''OpenFOAM commands'''

'''blockMesh''', '''rhoCentralFoam''', visualize the results using '''Paraview.'''

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| 05:57
| As an assignment, use the following '''wedge angles '''and run the '''template''' commands.

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| 06:03
| Let us summarize.

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| 06:05
| In this tutorial, we learnt about '''PyFoam Template Files'''

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| 06:10
| We also learnt to- Create and use '''template files''' and using the '''PyFoamFromTemplate dot py '''command

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| 06:19
| Please post your timed queries in this forum.

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| 06:23
| Please post your general queries on '''OpenFOAM '''in this forum.

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| 06:28
| The '''FOSSEE '''team coordinates the TBC project.

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| 06:32
| The Spoken Tutorial Project is funded by NMEICT, MHRD, Govt. of India. For more details , visit this website.

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| 06:41
| This is Rahul Joshi from IIT Bombay signing off. Thanks for watching

|}

OpenFOAM/C3/Using-Template-files-in-PyFoam/English-timed - Revision history

Pratik kamble: Created page with "{| border=1 | '''Time''' | '''Narration''' |- | 00:01 | Hello and welcome to the spoken tutorial on '''Using Template files in PyFoam.''' |- | 00:07 | In this tutorial we wi..."