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Simple Poiseuille flow

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Old   May 27, 2004, 10:58
Default Simple Poiseuille flow
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I am having problems with simulating a simple Poiseuille flow in a small pipe. At the boundary 'Inlet' I prescribe the velocity in 3 directions (0 in both y- and z-direction and 2*Vaverage*(1-r^2/R^2) in x-direction). At the outlet the relative static pressure is set to 0 Pa, and at the wall a 'no slip' condition is priscribed. As a result velocities of about 4e-3 m/s in y- and z-direction are created by CFX 5.6. How can I create a Poiseuille velocity field in the entire pipe (so velocities in y- and z-direction becomes 0 or in the order of 1e-6)?
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