Magnetohydrodynamic flow of Newtonian fluid in a scraped surface heat exchanger

Author： Siddiqui A.M. Imran A. Zeb M. Rana M.A.

E-ISSN： 1208-6045|93|10|1088-1099

ISSN： 1208-6045

Source： Canadian Journal of Physics, Vol.93, Iss.10, 2015-01, pp. : 1088-1099

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Abstract

This paper aims to study a mathematical model of electrically conducting incompressible Newtonian fluid flow in a scraped surface heat exchanger in the presence of a transverse magnetic field. In our case the gap between the blades and the device wall is narrow so lubrication theory approximations work for the flow. Steady isothermal flow of an electrically conducting Newtonian fluid is considered around a periodic array of pivoted scraper blade in a channel in which the lower wall is moving and the upper wall is at rest. Two-dimensional flow in the transverse section of a scraped surface heat exchanger is taken. Details of the flow properties, including the possible presence of regions of reversed flow under the blades, the forces on the blades and walls, and the fluxes of fluid above and below the blades are calculated. Graphic representation for involved flow parameters is also given.