Learning Forum

[christopher]

Hello,

want to set up an parameter study for an geometry optimization with ANSYS Fluent. Therefore I use ANSYS Workbench 19.2 with Fluent for a transient coupled flow and heat transfer simulation with two solid materials and one fluid material. The transient simulation has some initial conditions (different temperatures in the three materials). In a normal study I apply the initial conditions via patching after the initialization.

When I then start a parameter set with different geometries, the next simulation starts with the results of the previous simulation instead of the initial conditions.

 

How can I apply the initial conditions for every design point in my parameter study?

 

Thank you in advance and kind regards,

Christopher

[DrAmine]

In the Workbench keep the properties of the Solution Cell when it comes to initialization to "solver controlled".

[christopher]

Thank you! It works now!

 

I got one more issue:

I stop the Simulation once a certain value is reached with this command in the "execute commands" Option: (if (> 408 (pick-a-real "/rep/volume/max 10 , temperature n")) (set! mstop? #t))

Now I want to change the time step size when a little higher temperature is reached. I already found a command ("solve/set/time-step 1e-1") which works when I use it without the "if" command.

 

How can I implement the command "solve/set/time-step 1e-1" the following "if" command: (if (> 408 (pick-a-real "/rep/volume/max 10 , temperature n")) XXX)?

When I just write the command instead of XXX it does not work.

 

Best regards,

Christopher

 

[DrAmine]

Please mark this topic as solved and highlight the answer it helped you. For future questions please create new threads.

Now for the other part you can think about using : 

(ti-menu-load-string "/solve/set/whatever")

[andreaimpiombato]

thanks Amin for the helpful answer.
I have the following problem.

I have to do a parametric study and I have touse the Response Surface.

My case is transitory and for the first simulation of each case I would like to use as an initial condition. Is it possible not to consider the first time-step of each simulation automatically in the final solution?

Thank you