fix

Author: bigfooted

SU2_CFD/src/solvers/CNSSolver.cpp

@@ -823,10 +823,8 @@ void CNSSolver::SetTau_Wall_WF(CGeometry *geometry, CSolver **solver_container,
       const auto iPoint = geometry->vertex[iMarker][iVertex]->GetNode();
       const auto Point_Normal = geometry->vertex[iMarker][iVertex]->GetNormal_Neighbor();
 
-      /*--- Check if the node belongs to the domain (i.e, not a halo node)
-       *    and the neighbor is not part of the physical boundary ---*/
-
-      if (!geometry->nodes->GetDomain(iPoint)) continue;
+      /*--- On the finest mesh compute also on halo nodes to avoid communication of tau wall. ---*/
+      if ((!geometry->nodes->GetDomain(iPoint)) && !(MGLevel==MESH_0)) continue;
 
       /*--- Get coordinates of the current vertex and nearest normal point ---*/