UDF: problem with calculating velocity gradient to normal direction -- CFD Online Discussion Forums

January 15, 2019, 03:29	UDF: problem with calculating velocity gradient to normal direction	#1
hkdai New Member Ho Kam Dai Join Date: Oct 2018 Posts: 1 Rep Power: 0	Hello, Recently, I am doing a project related to a pipe structure and I need to do some modification to the surface shear stress, so I need to access the velocity gradient to the normal direction for the purpose. Since the structure is something similar to a circular pipe, C_V_G(c,t),C_U_G(c,t) and C_W_G(c,t) would not directly access what I need. Is there any thoughts or suggestion that can help me out of this problem?

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