Experimental and CFD Studies of a Fluid Flow in a Draft-Tube Stirred Tank

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Zhengming Gao¹  Rex B. Thorpe³  Xinqiu Li²  Jian Min¹  Shixin Xiao¹  John M. Smith³ 

[1] College of Chemical Engineering, Beijing University of Chemical Technology;Institute of Nuclear and New Energy Technology, Tsinghua University;Chemical and Process Engineering, School of Engineering, University of Surrey

关键词: Numerical Simulation;    Stirred Tank;    Draft Tube;   

DOI  :  10.1252/jcej.40.630

来源: Maruzen Company Ltd

【 摘 要 】

References(15)The velocity distribution and circulation flow rate in a draft-tube stirred tank of 0.8 m diameter were studied experimentally and were numerically simulated using the FLUENT6.2 computational fluid dynamics (CFD) package. A renormalization group (RNG) k–ε turbulent model and multiple reference frame (MRF) were used in the simulation. The circulation flow number and liquid velocity predicted by CFD were in good agreement with experimental values. Both experimental and simulation results show that the axial velocity is far larger than radial and tangential velocities inside and outside the draft tube, and there is a secondary circulation zone close to the outside wall of the draft tube, which could affect the efficiency of the tank. The results are to be of reference for the industrial stirred tank with a draft tube.

【 授权许可】

Unknown