Computational Investigation of Particulate Slurry Flow Around a Square Shaped Obstruction in a Rectangular Duct
Manabendra Pathak
Mechanical Engineering Department, Indian Institute of Technology Patna, Patna, Bihar 800 013, India.
mpathak@iitp.ac.in
ABSTRACT
A computational investigation of two-phase (solid-liquid) slurry flow around a square shaped obstruction in a rectangular duct is made. The slurry flow of low particle concentration consists of zinc tailing and water, where water is used as the primary phase and zinc tailing as the secondary phase. The algebraic slip mixture model is used to solve the two-phase flow governing equations and the standard k-ε model is used to resolve the turbulence of the flow field. The commercial code FLUENT 6.2 based on the finite volume method is used to predict the mean flow properties for two different values of mean mixture velocity. The obstruction affected two-phase flow characteristics are explained by analyzing the volume fraction distribution and slip velocity of the two constituent phases. A complex interaction between the two phases is observed at the downstream of the obstruction. A qualitative change of the flow pattern in terms of concentration distribution of each phase and slip velocity between the two phases are observed in the downstream of the obstruction. The distributions of volume fraction and slip velocity are effected by the values of mean mixture velocity.
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