Affiliation:
1. Clausthal University of Technology Institute of Chemical and Electrochemical Process Engineering Leibnizstr. 16 38678 Clausthal-Zellerfeld Germany
2. University of Chemistry and Technology Prague Department of Chemical Engineering Technická 3 160 00 Praha 6 Czech Republic
3. BASF SE Carl-Bosch-Straße 38 67056 Ludwigshafen am Rhein Germany
4. Karlsruhe Institute of Technology Institute of Chemical Process Engineering Fritz-Haber-Weg 2 76131 Karlsruhe Germany
Abstract
AbstractAlthough mixing in stirred tanks is common in the chemical and process industry, it is complex and not fully understood. In recent years, computational fluid dynamics (CFD) simulations with large eddy simulation turbulence models have become an important modeling tool. In this study, its current state for applicability to stirred tanks was evaluated. First, the power characteristics of different impellers were simulated and compared with experimental data. Second, Rushton and pitched blade turbines were validated in terms of the local velocity components, dissipation rates, and the trailing vortex. Finally, mixing times for different viscosity ratios were obtained from the CFD results and compared with a literature study. Hydrodynamics can be well predicted. However, mixing times for viscosity ratios larger than 1:100 are error‐prone.
Subject
Industrial and Manufacturing Engineering,General Chemical Engineering,General Chemistry