how to write a CFX batch file in linux?

w784370882 · November 15, 2018, 08:06

hello, everyone. I want to know how to run a series of cases with the same model, the only difference is boundary conditions. say a mass flow rate changing from 1kg，2kg，3kg……10kg. I don't want to set the boundary conditions one by one. Is there a way to realize it? can you give me an example file with the correct format? thanks!!!

ghorrocks · November 15, 2018, 16:33

Generate a CCL file. Then generate copies of the CCL file with the boundary condition modified to have 1kg/s, 2kg/s etc. Then do a batch script to run them all, something like

cfx5solve -ccl run1.ccl
cfx5solve -ccl run2.ccl

Alternately you can do this with parametric modelling in workbench.

Opaque · November 16, 2018, 09:31

There are many ways to answer this question. Here are some (skipping CEL to minimize them)

1 - Glenn's suggestion: generate one command file per value of the BC, and use the command line repeatedly

2 - Create a script in any language (Perl, csh/bash/ksh, Python) that will do:
Extract the command file (using cfx5cmds -def ...)
Loop over the values of interest
Search for value to be replaced
Replace such value
Submit simulation using cfx5solve -def .. -ccl new_file.ccl

3 - Use the latest version of the software, and use the new feature for this intended purpose (Operating Maps). Read the documentation, and you will be on your way, i.e. interpreting results.

Hope the above helps,

November 15, 2018, 08:06	how to write a CFX batch file in linux?	#1
w784370882 New Member gengchen Join Date: May 2018 Posts: 14 Rep Power: 7	hello, everyone. I want to know how to run a series of cases with the same model, the only difference is boundary conditions. say a mass flow rate changing from 1kg，2kg，3kg……10kg. I don't want to set the boundary conditions one by one. Is there a way to realize it? can you give me an example file with the correct format? thanks!!!

November 15, 2018, 16:33		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	Generate a CCL file. Then generate copies of the CCL file with the boundary condition modified to have 1kg/s, 2kg/s etc. Then do a batch script to run them all, something like cfx5solve -ccl run1.ccl cfx5solve -ccl run2.ccl Alternately you can do this with parametric modelling in workbench. w784370882 likes this. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

November 16, 2018, 09:31		#3
Opaque Senior Member Join Date: Jun 2009 Posts: 1,803 Rep Power: 32	There are many ways to answer this question. Here are some (skipping CEL to minimize them) 1 - Glenn's suggestion: generate one command file per value of the BC, and use the command line repeatedly 2 - Create a script in any language (Perl, csh/bash/ksh, Python) that will do: Extract the command file (using cfx5cmds -def ...) Loop over the values of interest Search for value to be replaced Replace such value Submit simulation using cfx5solve -def .. -ccl new_file.ccl 3 - Use the latest version of the software, and use the new feature for this intended purpose (Operating Maps). Read the documentation, and you will be on your way, i.e. interpreting results. Hope the above helps, w784370882 and shk09 like this.

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