Abstract
This paper presents the parametric study for the flow characteristic and heat transmission of MHD TiO2-water nanofluid (NF) in a permeable channel with expanding or contracting walls with thermal radiation. The slip condition is imposed on the lower wall of the channel. The Tiwari-Das (TD) NF model is used to study the properties of the nanoparticles (NPs) considering water as base fluid (BF). Similarity transformations are used to transform the governing momentum and energy equations into non-linear ordinary differential equations (ODEs) which are then solved by homotopy analysis and shooting methods. The influence on flow fields of velocity, temperature, surface friction factor and Nusselt number due to several parameters representing slip, porosity, radiation, magnetic field and suction/injection are studied graphically. It is examined that velocity profile and skin friction are decreased by slip parameter and magnetic parameter. It is also remarked that the temperature profile increases and Nusselt number decreases for radiation parameter.
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