pressure viscous drag on pipe -- CFD Online Discussion Forums

December 30, 2014, 13:50	pressure viscous drag on pipe	#1
Hossam Alaa New Member Hossam Alaa Join Date: Nov 2014 Posts: 5 Rep Power: 11	Hello every body, I am new Fluent user and I have a question on pressure and viscous drag resulting from flow inside a pipe with fixed area which should be: pressure drag=0 , viscous drag > 0 in case of viscous flow .... when I used (hexahedron mesh) I found pressure drag =0, and viscous drag>0... BUT when I used (tetrahedron mesh) pressure drag was big value comparable to the viscous drag. can any one explain why this occurs when using tetrahedron elements?? Last edited by Hossam Alaa; December 31, 2014 at 03:33.

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