Traction boundary conditions -- CFD Online Discussion Forums

January 11, 2004, 10:04	Traction boundary conditions	#1
m malik Guest Posts: n/a	I have the following question on 3-dimensional FEM solution of momentum-continuity equations. Consider a simple capillary flow problem with only the pressure being specified at the two ends; velocities not specified. How does one apply the traction conditions: ,i,e, tx = (mu)(du/dz+dw/dx), ty = (mu)(dv/dz+dw/dy), and tz = -p+2(mu)(dw/dz) when velocity field is not know a-priori? (z = coordinate along the capillary axis). Thanks.

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