OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › MRT transformation matrix › Reply To: MRT transformation matrix December 1, 2022 at 11:42 am #7061 stephanModerator Dear Mike, thanks for your comment. The difference in the code is due to a different ordering of discrete velocities (columns) and moment polynomials (rows). BR Stephan