ECCE/ECAB 2021 will feature presentations on the various work areas of the IMS. These include: Lagrangian Particle Tracking and Bioreactor Compartmentalization as Novel Scale-up Tools for Biopharmaceutical Processes,Influence of fluid dynamics on selectivity of competitive consecutive gas liquid reactions, Enzyme catalysed reactions under high pressure in aerated bioreactors, Validation of Numerical Flow Simulations in a 3L Stirred Tank by Means of Real 4D Particle Trajectories and Modeling Polymer Fouling with an Euler-Lagrangian Approach in a Milli-Reactor with Static Mixing Elements.