NUMERICAL ANALYSIS OF FLOW BEHAVIOUR OF HIGHLY VISCOUS FLUID IN AGITATED VESSEL

Abstract

A numerical algorithm of two-dimensional laminar flow in an agitated vessel is established and the numerical results of the power input, the stream line and the velocity profiles for paddle and anchor impellers of various sizes are compared with the experimental ones. Both results are in good agreement with each other and it is concluded that the flow pattern in an agitated vessel with large-width impeller is almost two-dimensional. It is also shown that the characteristic velocity and length defined for the analogy expression of the transport phenomena at the agitated vessel wall by the authors are very useful for the local similarity of momentum transfer at and near the vessel wall for small-size impeller of d/D<0.6 in high Re_G range.