Hi Ali,

Just replied your email but good to see you did post the question on forum. The example script is pretty much what you're asking for, you just need to work thru it.

Otherwise, as mentioned in the email, you can just use the system command terminal:

Have a look at the subsections in the link below on how to use cfx through your system command terminal:
https://www.sharcnet.ca/Software/Flu.../i1304872.html

If you're familiar with .bat, write the command for execution for each mesh row by row using a text editor, save it as *.bat, run it and you're done.

As for post processing of quantitative data, you can use cfxmonitor.exe to extract the outputs of *.res in a .csv format to be read by excel/matlab. If you want visualisation, the only way is using cfx-post.

_

On the hind side, try looking into the design optimisation feature in ANSYS Workbench. It works well for structural but i'm not sure if it's applicable for CFX yet.

ANSYS Workbench optimsation works fine for CFX.

call CFX from Matlab
 

Hi everyone,
I have set up a CFD problem in CFX (workbench 16) and it works with no problem and accurate results. Now I want to set input velocity and output pressure to specific values from MATLAB and then start solving with cfx5solve. I can categorize my issue in two following questions:

1- How is it possible to set specific values for velocity and pressure from MATLAB, is it possible to set them in ccl or def files (editing ccl and def) and then call cfx5solve to run the analysis.

I assume that a command like this should work:

set-> variable name->variable value
but I can not find the corresponding command in MATLAB

2- How should I define run in MATLAB? I tried the following code in command window in MATLAB:

%%%%%%%%%%%%
!"C:\Program Files\Ansys Inc\V160\CFX\bin\cfx5solve" -def FFCFX0203.def -ccl relaibilityCCL.ccl
%%%%%%%%%%%%

but I receive the following error:

An error has occurred in cfx5solve:

Command Language file relaibilityCCL.ccl does not exist

I would be truly thankful if you could help me to manage this issue.

Well, isn't that error message pretty clear? Maybe because of a typo? It's spelled "reliability" to my English knowledge ;)

Thanks for your attention Maxim. But it is a typing mistake in both file name and command :-) so it is not the problem as I checked. :confused:
Is there any special directory for def and ccl files I have left both of them on desktop!

okay, but if the message is still: 'does not exist', your script cannot find the file in the folder it is looking for the file. My guess would be that the ccl file isn't in the right folder? Is it in the same directory as your def file?

My guess is that the working directory is not set. CFX looks for your .ccl file somewhere else.

Yes, both of them are in desktop directory.
yhe question is when I type the following command in matlab, I do not know in wich directory Matlab looks up the def and ccl files! ? I think a special directory should be specified. Am I right?

Thanks for your help Lance.
But I think MATLAB has got a big problem in finding def and ccl files because when I wright the following command it fails to find deffile. the same error hapens for both ccl and def!

%%%%%%%%%%%%%%%
!"C:\Program Files\Ansys Inc\V160\CFX\bin\cfx5solve" -def FFCFX0203.def
%%%%%%%%%%%%%%

error:

An error has occurred in cfx5solve:

ANSYS CFX Solver Input File C:/Users/NP/Documents/MATLAB/FFCFX0203.def does
not exist

then either put your def and ccl file in C:/Users/NP/Documents/MATLAB/

or change your command to
-def C:/Users/NP/Desktop/FFCFX0203.def

this is standard batch/console/programming syntax.
Or look up what a 'working directory' is and how it is set.
I don't want to be rude but I think you should go back a step and teach yourself some basics first...

Thanks a Million Maxim,
It worked:
!"C:\Program Files\Ansys Inc\V160\CFX\bin\cfx5solve" -def C:/Users/NP/Desktop/FFCFX0203.def

Anyway, you are right. I am not familiar with programming.

taking the advantage of your guidance I fixed the second issue I mentioned above, but my first question remains a disaster!

I need to edit CFX definition file (.def) in MATLAB and set some boundary conditions to new values and restart the analysis for updated boundary conditions.

I think it is a common issue in optimization problems but I can not find related topics in forum. I would be truly thankful if you could help me to fix this issue.

Darren Leong posted some Matlab code a page back. I would go from there and try to implement your ideas in the same syntax.
I don't have Matlab installed right now, so I cannot test things.
But what about you post your Matlab code that you have written so far?

Write a new .ccl in Matlab and use the -ccl option? You can get the syntax for the .ccl file by right clicking on the boundary condition in cfx-pre and 'edit in command editor'.

This seems perfect for what I am currently trying to achieve. However the link is now invalid, is there anyway you could please re-upload the link to the files?


Thanks!