DEFINE_GRID_MOTION UDF issues -- CFD Online Discussion Forums

June 29, 2011, 01:31	DEFINE_GRID_MOTION UDF issues	#1
quantum.tejas New Member Tejas C Join Date: Apr 2010 Posts: 10 Rep Power: 16	Hi I am writing out a UDF for the motion of a flapping wing in 3 D. I am using the DEFINE_GRID_MOTION macro. When I run it I have issues with negative volumes and sometimes a segmentation fault. Anybody has any idea. I have used the same logic as the one used in the UDF manual.

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