Does viscous force include force of particles ? -- CFD Online Discussion Forums

October 2, 2019, 04:14	Does viscous force include force of particles ?	#1
force_95 New Member jens meier Join Date: Sep 2019 Posts: 28 Rep Power: 7	Hey all, I'm simulating two bubbles moving against each other. The udf code I'm using is calculating the viscous force that acts on one bubble. Because of this viscous force the bubble slows down. When I insert particles, there is absolutely no effect on the behaviour of the bubble ( like slow down very faster). Do I have write another UDF with DPM_Drag _force in order to calculate that particle force ? Kind regards

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