Author(s)

A. Jahanmiri & E.T. Woodbind

Abstract

Mass transfer in turbulent flow A. Jahanmiri", E.T. Woodbind ^ Chemical Engineering Department, Shiraz University, Shiraz, Iran ^Department of Chemical Engineering, UMIST University, UK ABSTRACT In order to assess the effect of turbulence on the rate of mass transfer in the liquid phase, work has been carried out on gas absorption by liquid flowing over spheres. The hydrodynamics of the liquid flow over spheres was modelled incorporating eddy viscosity. The coefficients of the eddy viscosity expression were evaluated by measuring the liquid hold-up over a string of twenty spheres of 3.7 cm diameter. The range of the liquid Reynolds numbers was between 30-600. The form of eddy viscosity was found to be of the form: Mass transfer in the liquid film flowing over a sphere was modelled based on eddy diffusivity [1] incorporating the hydrodynamic model results for physical or chemical absorption accompanied by a instantaneous reaction and a pure

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