[Aina]

Hello everyone,

I am simulating the wind field in a typical block building. I have two kinds of meshes; structured (hexahedral elements and unstructured (tetrahedral elements). In the intel condition, I am using the boundary condition atmBoundaryLayerInletVelocity.

The simulation with the structure mesh works well but the one with the unstructured mesh makes something strange at the inlet as you can see in the figure attached. The inlet velocity is not uniform. The setup of the two cases are the same, only the mesh is different

Thanks in advance


inlet
{
type atmBoundaryLayerInletVelocity;
#include "include/ABLConditions"
value uniform (0 0 0);
}
---------------------------
The ABLConditions file contains:

Zref 0.15; //reference height[m]
Uref table
(
(0 1)
(0.5 3.5) //equivale a (0.5 Uref)
);

zDir (0 0 1);
flowDir (1 0 0);
kappa 0.41;
Cmu 0.09;
z0 uniform 0.001;
E 9.8;
zGround uniform 0;
d uniform 0.0;