CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   CFX (http://www.cfd-online.com/Forums/cfx/)
-   -   Scalar problem (http://www.cfd-online.com/Forums/cfx/20006-scalar-problem.html)

Dougal McQueen November 21, 2003 08:23

Scalar problem
 
{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


All times are GMT -4. The time now is 15:27.