[Nek5000-users] volumetric heat source w/ inflow

[nek5000-users at lists.mcs.anl.gov]

Hello all,
I am working on a problem consisting of an axially-horizontal  
cylindrical tank with an inlet (an opening) at its top and a  
connected pipe to its bottom as an outlet. The boundary conditions  
are set accordingly, i.e., inflow and outflow, respectively. There is  
no problem with isothermal simulation of such configuration. However,  
when volumetric heat source is added to the fluid domain (via userq2  
subroutine), non-physical temperatures have been observed at the  
walls (w/ adiabatic BC) in the immediate vicinity of the inflow (w/  
Dirichlet temperature BC). In fact, the element nodes close to the  
inlet have very high or very low temperatures, which are no expected.

I am wondering if anyone has any experience/hint on this issue.

Thanks,
Mohsen