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Old   November 21, 2003, 08:23
Default Scalar problem
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Dougal McQueen
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{CFX-4} I am advecting a scalar quantity into the domain (potential temperature = 293) by setting the inlet boundary condition with usrbcs. The trouble is the scalar disappears downwind (not a transient run). The inlet condition is correct, but quickly downwind the scalar quantity disappears to zero. I have the diffusivity set to 2.7e-05 (which taken from physical charts). Anybody know any reason for this.

Also, I want to know whether my wall boundary condition for the ground is set right using usrbcs. I have set A=1, B=0, and C=ground temperature.

Many thanks in advance

Dougal
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