CFD simulation of hydrodynamics of rectangular external loop airlift reactor

This contribution is aimed at CFD simulation of hydrodynamics of gas-liquid external loop rectangular airlift reactor using Euler-Euler model. Commercial code Fluent 6.3 is used to solve model equations. The goal of the work was to compare simulation results with experimental data available in literature. Simulated horizontal profiles of liquid and bubble velocity and gas holdup were compared with data from literature.info:eu-repo/semantics/publishedVersio

Euler-euler simulation of gas-liquid and gas-liquid-solid airlift reactors : case study

The Czech Science Foundation / Grantová agentura České republiky (GACR) - GA104/07/1110, GA104/06/1418

Wall Shear Rates in Taylor Vortex Flow

Wall shear rate and its axial and azimuthal components were evaluated in stable Taylor vortices. The measurements were carried out in a broad interval of Taylor numbers (52-725) and several gap width (R1/R2 = 0.5 – 0.8) by two three-segment electrodiffusion probes and three single probes flush mounted in the wall of the outer fixed cylinder. The axial distribution of wall shear rate components was obtained by sweeping the vortices along the probes using a slow axial flow. The experimental results were verified by CFD simulations. The knowledge of local wall shear rates and its fluctuations is of primordial interest for industrial applications like tangential filtration, membrane reactors and bioreactors containing shear sensitive cells

Wall shear rates in Taylor vortex flow

International audienceWall shear rate and its axial and azimuthal components were evaluated in stable Taylor vortices. The measurements were carried out in a broad interval of Taylor numbers (52-725) and several gap width (R-1/R-2 = 0.5 - 0.8) by two three-segment electrodiffusion probes and three single probes flush mounted in the wall of the outer fixed cylinder. The axial distribution of wall shear rate components was obtained by sweeping the vortices along the probes using a slow axial flow. The experimental results were verified by CFD simulations. The knowledge of local wall shear rates and its fluctuations is of primordial interest for industrial applications like tangential filtration, membrane reactors and bioreactors containing shear sensitive cells