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Fluid-Structure Interaction - problem with stopped calculations

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Old   April 6, 2020, 09:52
Default Fluid-Structure Interaction - problem with stopped calculations
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Marcin
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Hi everyone,

I am solving fluid-structure interaction problem using Fluent, Mechanical and System Coupling.

After calculation of a certain number of timesteps (over 800) and obtaining the maximum (20) coupling iterations, I cant get further - calculations are kind of stopped.
In task manager, the ANSYS applications do not use any resources. I do not obtain any messages - contributing to license or convergence problems, which might cause such situation. Thus I dont have any idea why it is happening; I got typical outputs for succesfull calculations: in Mechanical - "Preparing the mathematical model" and in System Coupling Solution Informations - the convergence data for 20th coupling iteration (which are OK).


I was waiting two days but nothing changed, then I restarted the computer and calculations and the problem appeared for the same timestep number.

Please give me some suggestions how could I solve such situation

Regards
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Old   July 1, 2020, 09:41
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Joo-Yeob Lee
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Is there any error messages or log files?

Do you mean the analysis shut down abnormally?
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