OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Turbulence in closed space › Reply To: Turbulence in closed space November 15, 2020 at 3:38 pm #5323 mathiasKeymaster Dear jdm, you can use the standard rename function starting from what you have right now: superGeometry.rename( int fromMaterial, int toMaterial ); Best Mathias