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Startin calculation from specific previous iteration step

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Old   July 4, 2013, 08:02
Default Startin calculation from specific previous iteration step
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hekseli
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Hey!

Is it possible to start a new iteration with new setup from a specific previous iteration step? I used to do that a lot with OF but now with Fluent I couldn't find a way to do it.
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Old   July 4, 2013, 11:07
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Hi mate,
if you're using Fluent via workbench, just connect from "Solution" of problem which has been solved to "Solution" of problem which you wanna start from last one. See the pircture:
7-4-2013 7-30-42 PM.jpg
If you are using Fluent as standalone, and you just change the setup within one file, just start calculation without initializing; it will start from last run.

If you use Fluent as stanalone and files are different (meshes are different in two files), you need to interpolate (File->Interpolate) to write a data file from first problem and then interpolate to read data from file you just created.
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Old   August 6, 2013, 13:28
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Hi,

I am having a similar problem. I am using coarse mesh for an unsteady simulation until a specific time. Then I interpolate results and initiate another case with same setup but finer mesh to continue my simulation. The problem is residuals don't converge good. I have decreased time step and also decreased under-relaxation factors but nothing changes. any suggestions please?
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Old   August 6, 2013, 22:11
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François Grégoire
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Quote:
Originally Posted by ndabir View Post
Then I interpolate results and initiate another case with same setup but finer mesh to continue my simulation.
I'm a little confused: do you interpolate and initialize? Because if you initialize you lose the interpolated data and restart at t=0.
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Old   August 7, 2013, 00:33
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no. I just interpolate but the residuals are not good.
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