Using steady state simulation as initial condition in another solver

TommyJ · June 3, 2022, 20:49

Hi OpenFoam community,

I just started using the software and have a newbish question.

I have done a simulation with simpleFoam to get a steady state condition.

Now I want to use this steadystate condition (velocity and pressure) in another simulation as the initial condition. The mesh is exactly the same. Can I just copy the results from the latest time step into the 0/ directory and erase the location and arch from the header in FoamFile?

Is copy/paste enough? Is there a utility to do this? What is the procedure?

dlahaye · June 5, 2022, 16:13

Edit system/controlDict and set startTime for simulation-2 equal to endTime of simulation-1.

TommyJ · June 6, 2022, 04:37

Quote:

Originally Posted by dlahaye

Edit system/controlDict and set startTime for simulation-2 equal to endTime of simulation-1.

Hi thank you for the reply.
What if the second solver is transient?
To your knowledge is there a problem with copying the files into the zero folder to use as initial condition?

Best regards,

dlahaye · June 7, 2022, 10:19

Both approaches work.

June 3, 2022, 20:49	Using steady state simulation as initial condition in another solver	#1
TommyJ New Member Join Date: Jun 2022 Posts: 19 Rep Power: 4	Hi OpenFoam community, I just started using the software and have a newbish question. I have done a simulation with simpleFoam to get a steady state condition. Now I want to use this steadystate condition (velocity and pressure) in another simulation as the initial condition. The mesh is exactly the same. Can I just copy the results from the latest time step into the 0/ directory and erase the location and arch from the header in FoamFile? Is copy/paste enough? Is there a utility to do this? What is the procedure?

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June 5, 2022, 16:13		#2
dlahaye Senior Member Domenico Lahaye Join Date: Dec 2013 Posts: 802 Blog Entries: 1 Rep Power: 18	Edit system/controlDict and set startTime for simulation-2 equal to endTime of simulation-1.

June 7, 2022, 10:19		#4
dlahaye Senior Member Domenico Lahaye Join Date: Dec 2013 Posts: 802 Blog Entries: 1 Rep Power: 18	Both approaches work.