** ERROR 221059 ** No upwind element found during temperature convection at node node number.
The heat convection between neighbouring nodes is calculated at each time step in the analysis. In doing so, the solution algorithm traces an upwind path in the direction opposite the velocity direction. No upwind element was found, which means that there is a local inversion and overlapping in the tetrahedral mesh.
Remesh the geometry starting from a better quality Dual Domain mesh (less high aspect ratio triangles). Specify a lower allowed aspect ratio in the 3D meshing parameters.