Thomas Ruby BentzenNicolás RatkovichMichael R. RasmussenS. MadsenJ. C. JensenS. N. Bak2026-03-222026-03-22201210.1615/interjfluidmechres.v39.i4.60https://doi.org/10.1615/interjfluidmechres.v39.i4.60https://andeanlibrary.org/handle/123456789/62368Fouling is the main hurdle of the widespread of MBR systems. One way to decrease and/or control fouling is by hydrodynamics, increasing the liquid cross-flow velocity. In rotational cross-flow MBR systems, this is attained by the spinning of the impellers. Validation of the CFD model was made against LDA tangential velocity measurements (error less than 8 %) using water as a fluid. The shear stress over the membrane surface was inferred from the CFD simulations for water. Shear stress and area-weighted average shear stress relationships were made based on the CFD results. These relationships can be link to the energy consumption of this type of system.enComputational fluid dynamicsImpellerShear stressMechanicsTurbulenceFoulingFlow (mathematics)Materials scienceSpinningShear (geology)article