Porosity effect on the boundary layer Bodewadt flow of a magnetic nanofluid in the presence of geothermal viscosity
National Institute of Technology Kurukshetra, 136119, Haryana, India
2 Department of Mechanical Engineering, Manipal University Jaipur, 303007, Rajasthan, India
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Accepted: 26 April 2017
Published online: 9 June 2017
The aim of this paper is to study the Bodewadt flow of a magnetic nanofluid in the presence of geothermal viscosity. The effects of porosity on an unsteady boundary layer flow of water-based magnetic nanofluids over a uniformly heated stationary disk are discussed numerically. Fluid viscosity is considered as a function of both depth and temperature. The Runge-Kutta fourth-order method along with the shooting technique is employed for solving a set of coupled ordinary differential equations. The computed results reveal that heat transfer is appreciably enhanced with more porosity and rotation of the fluid. Also, varying the fluids Prandtl number from 20 to 80, the rate of heat transfer increases by 93.35% and faster cooling of the system occurs.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, 2017