OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › "WARNING: no discreteNormal is found " in the free energy model › Reply To: "WARNING: no discreteNormal is found " in the free energy model September 24, 2019 at 9:09 am #4569 mathiasKeymaster Dear Simon, can you check how many voxel are between the spheres? It should be at least two. By refining the mesh it should be ok. Best Mathias