Fluid-Structure Interaction - problem with stopped calculations

destroy · April 6, 2020, 09:52

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
Destroy

hermedo · July 1, 2020, 09:41

Is there any error messages or log files?

Do you mean the analysis shut down abnormally?

April 6, 2020, 09:52	Fluid-Structure Interaction - problem with stopped calculations	#1
destroy Member Marcin Join Date: Jun 2016 Posts: 96 Rep Power: 9	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 Destroy

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July 1, 2020, 09:41		#2
hermedo New Member Joo-Yeob Lee Join Date: Jul 2020 Posts: 3 Rep Power: 5	Is there any error messages or log files? Do you mean the analysis shut down abnormally?