OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Fluctuation on thermal field with curved boundaries › Reply To: Fluctuation on thermal field with curved boundaries January 18, 2021 at 4:08 pm #5448 mathiasKeymaster Which values are used for the boundary values? Analytical ones at the surface of off the surface (in the volume)? I would you the values off-surface at thir exact positions. What happens if yoiu refine the mesh?