Calculating particle normal velocity using UDF -- CFD Online Discussion Forums

July 8, 2009, 19:39	Calculating particle normal velocity using UDF	#1
shankara.2 New Member Prashanth Join Date: Apr 2009 Posts: 19 Rep Power: 17	Hi all I need to calculate the normal velocity of a particle when it hits a wall in my UDF. I know it is the dot product of the normal vectors in each direction and the normal velocities in the corresponding directions. Could someone tell me how to obtain the normal vectors in each direction? Mine is a 3d case. Please explain as detailed as you can as I want to make sure I get this right before I move on. Thanks Prashanth

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