شماره ركورد كنفرانس :
5048
عنوان مقاله :
Evaluation of drag force effect on gas holdup in a Gas-liquid stirred tank reactor
Author/Authors :
R ،Zadghaffari Chemical Engineering Faculty - Sahand University of Technology - Tabriz, Iran , J.S ،Moghaddas Chemical Engineering Faculty - Sahand University of Technology - Tabriz, Iran , J ،Revstedt Faculty of Engineering - Lund University Division of Fluid Mechanics - Lund, Sweden
كليدواژه :
Stirred Tank , Drag force , CFD , MRF
عنوان كنفرانس :
ششمين كنگره بين المللي مهندسي شيمي
چكيده لاتين :
A comprehensive computational method based on the Eulerian-Eulerian approach was presented for
gas-liquid flows in a mechanically stirred vessel. Separate submodels were developed to investigate the
influence of the drag coefficient on bubble due to interaction between bubbles and turbulence. A new model
was used for definition of drag coefficient and a detailed simulation method was used to estimating
the interphase drag force. The modelling method has been applied to a baffled tank stirred by a
Rushton turbine, and simulation results are compared with the previous drag models and
experimental measurements of Barigou and Greaves. The standard k - e turbulent model was used
and the impeller rotation was modelled by the Multiple Reference Frame (MRF) approach. The
computational model and proposed correlation for drag in turbulent flow would be useful for
simulation gas holdup distribution and flow regimes in stirred vessels.