CFD Prediction of Effects of Impeller Design on Floating Solids Mixing in Stirred Tanks with Pitched Blade Turbines

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Shengchao Qiao¹  Yuefei Yan¹  Rijie Wang¹  Xiaoxia Yang¹ 

[1] School of Chemical Engineering and Technology, Tianjin University

关键词: Floating Solids;    CFD;    Flow Pattern;    Stirred Tank;    PBT;    Two-Phase Flow;   

DOI  :  10.1252/jcej.13we313

来源: Maruzen Company Ltd

【 摘 要 】

References(29)Cited-By(1)Computational fluid dynamics (CFD) simulations were performed to study effects of the flow pattern on the mixing quality of floating solids in stirred tanks with up- and down-pumping pitched blade turbine (PBTU and PBTD). The variables about impeller design have influences in the flow pattern and four key ones, impeller diameter, clearance from tank bottom, blade angle and number, were investigated in this work. Euler–Euler multiphase model along with mixture k–ε turbulence model was adopted. The relative motion between rotating impeller and stationary baffles was modeled with the multiple reference frame (MRF) approach. The predicted results were compared and explained with the experimental or theoretical results in published literature. Qualitative and reasonable agreement was achieved.

【 授权许可】

Unknown