System coupling timestep

Luigi* · November 8, 2020, 13:17

Hi,

I have to make a fluid-structure analysis with system coupling. During the analysis I have to change the timestep, but I know that the timestep must be fixed during the run in system coupling.
So I made 2 analysis in succession, when I have to change the timestep, the analysis is stopped and then restarted with a new timestep.

To avoid the stopping and the restarting, is there a way to define the change in the timestep before the analysis begins?

Thanks

Luigi* · November 10, 2020, 06:26

Thanks, I have another question. In my analysis I introduce a discrete phase (dpm), and before the restarting I check if the trajectories of particles are ok, then I restart the analysis with the change in timestep.

At the end it seems that the system recalculates also the trajectories related to the first part of the analysis, but now based on the new flow field.

Do you have any advice on how to manage the dpm solutions when I restart the analysis?

November 8, 2020, 13:17	System coupling timestep	#1
Luigi* New Member Join Date: Sep 2020 Posts: 8 Rep Power: 6	Hi, I have to make a fluid-structure analysis with system coupling. During the analysis I have to change the timestep, but I know that the timestep must be fixed during the run in system coupling. So I made 2 analysis in succession, when I have to change the timestep, the analysis is stopped and then restarted with a new timestep. To avoid the stopping and the restarting, is there a way to define the change in the timestep before the analysis begins? Thanks

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November 10, 2020, 06:26		#2
Luigi* New Member Join Date: Sep 2020 Posts: 8 Rep Power: 6	Thanks, I have another question. In my analysis I introduce a discrete phase (dpm), and before the restarting I check if the trajectories of particles are ok, then I restart the analysis with the change in timestep. At the end it seems that the system recalculates also the trajectories related to the first part of the analysis, but now based on the new flow field. Do you have any advice on how to manage the dpm solutions when I restart the analysis?