Browsing by Author "Onwubuoya, C."
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Item An investigation of magnetohydrodynamic Maxwell fluid flow on accelerating porous surface using Spectral Homotopy Analysis Method(Journal of Science, Technology, Mathematics and Education (JOSTMED), Federal University of Technology, Minna., 2019) Dada, M.S.; Onwubuoya, C.; Agunbiade, S.A.; Disu, A.B.This paper investigates the viscous dissipation Magnetohydrodynamic (MHD) convective flow of Maxwell fluid along a porous accelerating surface in the presence of radiation, buoyancy and heat generation. The Rosseland approximation for optically thick fluid is considered. The physical model is governed by highly nonlinear equations which were transformed using similarity variables and solution technique adopted is Spectral Homotopy Analysis Method (SHAM) which is carried out up to 5^th order of approximation. The influence of pertinent flow parameters on the velocity and temperature are presented both in tabular and graphical forms. A hike in the Eckert number gives a fall in both the velocity and temperature profiles. It is observed that a rise in the Deborah number accelerates the velocity profile but decreases the temperature profile while the magnetic field parameter produces an opposition to the flow. It is found that increasing the radiation parameter produces a significant increase in the thermal condition of the fluid temperature. The numerical results are in better agreement with the existing ones in literature.Item The unsteady radiative and MHD free convective two immiscible fluid flows through in a horizontal channel(Nigerian Journal of Pure and Applied Sciences, Faculties of Physical and Life Sciences, University of Ilorin, Ilorin, 2014) Dada, M.S.; Onwubuoya, C.; Joseph, K.M.In this present work, the unsteady radiative and MHD free convective two immiscible fluid flows through a horizontal channel have been investigated, the upper channel is assumed to be porous while the lower is non-porous. The partial differential equations governing the fluid flow are transformed to ordinary differential form by a regular perturbation method and the analytical solution for each fluid are obtained and the solution matches at the interface. The result are presented for various values of the fluid parameters such as, Grash of number, radiative parameter, and frequency parameter, Prandtl number, viscosity and conductivity ratio, It is found among others results that as the thermal radiation from wall temperature decreases, the temperature profile and thermal boundary layers increases.