New version of OpenLB was released. Download here OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › compute stress › Reply To: compute stress February 13, 2025 at 9:58 am #9877 AdrianKeymaster pi[2] is the xz component of the strain rate tensor in 3D. In 2D pi[2] is the yy component.