Lie group analysis for the effects of temperature-dependent fluid viscosity and chemical reaction on MHD free convective heat and mass transfer with variable stream conditions

Kandasamy, Ramasamy and Ismoen, Muhaimin and Saim, Hashim (2010) Lie group analysis for the effects of temperature-dependent fluid viscosity and chemical reaction on MHD free convective heat and mass transfer with variable stream conditions. Nuclear Engineering and Design, 240 (1). pp. 39-46.

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Abstract

This paper concerns with a steady two-dimensional flow of an electrically conducting incompressible fluid over a vertical stretching surface. The flow is permeated by a uniform transverse magnetic field. The fluid viscosity is assumed to vary as a linear function of temperature. A scaling group of transformations is applied to the governing equations. The system remains invariant due to some relations among the parameters of the transformations. After finding three absolute invariants a third-order ordinary differential equation corresponding to the momentum equation and two second-order ordinary differential equation corresponding to energy and diffusion equations are derived. The equations along with the boundary conditions are solved numerically. It is found that the decrease in the temperature-dependent fluid viscosity makes the velocity to decrease with the increasing distance of the stretching sheet. At a particular point of the sheet the fluid velocity decreases with the decreasing viscosity but the temperature increases in this case. It is found that with the increase of magnetic field intensity the fluid velocity decreases but the temperature increases at a particular point of the heated stretching surface. Impact of chemical reaction in the presence of thermal radiation plays an important role on the concentration boundary layer. The results thus obtained are presented graphically and discussed.

Item Type:Article
Subjects:Q Science > QA Mathematics
T Technology > TJ Mechanical engineering and machinery > TJ255-265 Heat engines
Divisions:Faculty of Science, Technology and Human Development > Department of Science and Mathematics
ID Code:2338
Deposited By:M.Iqbal Zainal A
Deposited On:07 Nov 2012 10:59
Last Modified:07 Nov 2012 10:59

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