Analysis of Fluid Flows in a Stirred Tank Using Computational Fluid Dynamics

전산유체역학을 이용한 교반탱크 내 유체흐름 해석

  • Kim, Mi Jin (Department of Chemical Engineering, Kongju National University) ;
  • Lee, Kyung Mi (Department of Chemical Engineering, Kongju National University) ;
  • Park, Kyun Young (Department of Chemical Engineering, Kongju National University)
  • 김미진 (공주대학교 화학공학부) ;
  • 이경미 (공주대학교 화학공학부) ;
  • 박균영 (공주대학교 화학공학부)
  • Received : 2010.01.15
  • Accepted : 2010.03.10
  • Published : 2010.06.30

Abstract

The flow patterns in a stirred tank, 1m in diameter and 1 m in height, were studied using CFX, a commercial computational fluid dynamics program, with the impeller rotation speed, the impeller blade angle and the tank-bottom shape varied and the baffles included or excluded. A vortex was observed in the center of the tank in the absence of the baffles, and the intensity of the vortex increased with increasing the rotation speed. The vortex was considerably reduced in the presence of the baffles. An increase in the blade angle increased the vertical flow and decreased the vortex intensity. The flow in the corners of the tank bottom turned smoother as the tank bottom was varied in shape from flat to round.

Keywords

Stirred Tank;Flow Pattern;Numerical Analysis;Computational Fluid Dynamics

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