Hello Everybody,
I need to know how to couple time step between liggghts and CFD? I modified deltaT in OpenFoam but I got the error "TS is too big for coupling".
Regards,
Carlos
A project by DCS Computing and CFDEMresearch
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Wurdon | Wed, 08/13/2014 - 11:20
Timesteps
Hi Carlos,
the coupling interval is defined in CFD/constant/couplingProperties. The DEM timestep is defined in DEM/in.liggghts_resume.
I think you have to choose the timesteps according to: CouplingInterval x DEM timestep >= CFD timestep.
Best regards,
Philipp
Carlos Guamushig | Fri, 08/15/2014 - 22:22
TIMESTEPS
Hi Philipp,
Thanks for your answer. I will try it.
Regards,
Carlos
cgoniva | Wed, 08/20/2014 - 09:44
Dear Carlos,
Dear Carlos,
I'd suggest the following procedure:
-Start with setting up the DEM part of the sim and see what DEM timestep you need there.
-then (depending on the dynamics) set the coupling interval between 1 and 500
-then set the CFD timestep accordingly
Your error message means that CFD detlaT is bigger than DEM deltaT * couplingInterval.
Cheers,
Chris