New to LBM and OpenLB? Attend our upcoming one-week hands-on Spring School in Marseille/France from 19.05.2025 – 23.05.2025. OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Storing velocity data in csv file › Reply To: Storing velocity data in csv file July 1, 2021 at 10:36 am #5767 AdrianKeymaster The increment operation in the nested loop contains a typo, it should be ++latticeR[1].