CFD investigation of bubble effects on Taylor-Couette flow patterns in the weakly turbulent vortex regime

TY - JOUR

T1 - CFD investigation of bubble effects on Taylor-Couette flow patterns in the weakly turbulent vortex regime

AU - Gao, Xi

AU - Kong, Bo

AU - Vigil, R. Dennis

N1 - Publisher Copyright: © 2015 Elsevier B.V.

PY - 2015/6/5

Y1 - 2015/6/5

N2 - The effect of gas bubbles on Taylor-Couette flow patterns in the transition from laminar to weakly turbulent vortex flow is investigated by quasi-2D and 3D CFD simulation. The CFD model is based on the Eulerian-Eulerian two-fluid approach with constitutive closures for inter-phase forces and liquid turbulence and validated by comparison with previously published experimental data. The bubble spatial distribution patterns and the mechanism by which the dispersed fluid obtains a non-uniform radial distribution is discussed and the relative importance of various inter-phase forces is demonstrated. In addition, the experimental observation of vortex axial wavelength expansion due to the presence of bubbles was reproduced by the CFD simulations, and a two fluid Taylor-Couette flow regime map based on three observed regimes was constructed. Lastly, the influence of the azimuthal Reynolds number and gas superficial velocity on vortex wavelength, liquid velocity, mass transfer and turbulence are discussed in detail.

AB - The effect of gas bubbles on Taylor-Couette flow patterns in the transition from laminar to weakly turbulent vortex flow is investigated by quasi-2D and 3D CFD simulation. The CFD model is based on the Eulerian-Eulerian two-fluid approach with constitutive closures for inter-phase forces and liquid turbulence and validated by comparison with previously published experimental data. The bubble spatial distribution patterns and the mechanism by which the dispersed fluid obtains a non-uniform radial distribution is discussed and the relative importance of various inter-phase forces is demonstrated. In addition, the experimental observation of vortex axial wavelength expansion due to the presence of bubbles was reproduced by the CFD simulations, and a two fluid Taylor-Couette flow regime map based on three observed regimes was constructed. Lastly, the influence of the azimuthal Reynolds number and gas superficial velocity on vortex wavelength, liquid velocity, mass transfer and turbulence are discussed in detail.

KW - Bubble

KW - CFD simulation

KW - Gas-liquid flow

KW - Taylor vortex reactor

KW - Turbulent flow

UR - http://www.scopus.com/inward/record.url?scp=84923871507&partnerID=8YFLogxK

U2 - 10.1016/j.cej.2015.02.061

DO - 10.1016/j.cej.2015.02.061

M3 - 文章

AN - SCOPUS:84923871507

SN - 1385-8947

VL - 270

SP - 508

EP - 518

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -