Cases with small length scale work fine on a single processor but fail in parallel -- CFD Online Discussion Forums

February 25, 2009, 15:44	Hopefully a quick question for	#1
adona058 Member Adam Donaldson Join Date: Mar 2009 Location: Ottawa, Ontario, Canada Posts: 37 Rep Power: 17	Hopefully a quick question for someone out there to answer. I have a case with a cell lenght scale of ~0.00002 (not unreasonably small). When decomposed, solvers such as InterDyMFoam fail to get past the first pressure iteration (i.e. the solver goes through the maximum number of iterations). Yet when run on a single processor, everything proceeds fine. I currently have 10 decimals of precision set in the controlDict file... Does anyone know if I need to make some other settings changes to make a small-scale case work in parallel? Thanks, Adam

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