Wall heat flux: Ansys Fluent
 

Dear All

I am facing an issue with Ansys Fluent. I am solving a (molecular) multi-component gas flow using Low Pressure boundary slip. I have run it with tetrahedral mesh and also polyhedral (tet converted to poly directly in Fluent).

The results look OK except one part: the model with Poly mesh shows a sort a line of high surface heat flux across the Wall. All other results including Temperature and Velocity fields look OK. This surface (wall) heat flux could be a local phenomena. Interestingly, I started this problem first using Tet mesh and no such issue. Only with (converted Poly) I do see this on the contour plot of Wall heat flux

Anybody, any idea where it can come from? And how to resolve this?