Entropy Analysis for MHD Generalised Couette Flow in a Composite Duct

Abstract

This paper presents entropy analysis of electrically conducting Newtonian fluid flow inside a horizontal composite duct. The upper impermeable wall of the duct moves with a uniform velocity while the lower wall is porous strata of finite thickness with impermeable bottom. The upper wall and the impermeable bottom are at constant temperature but at different temperatures. The duct is divided into two regions: Region I of clear fluid and Region II of fluid saturated porous layer. Momentum and thermal regimes for clear and porous regions are matched at clear fluid-porous interface by employing suitable matching conditions. The governing equations are solved analytically. Analytical solutions obtained for velocity and temperature are utilized to compute entropy generation. The effects of pertinent parameter on temperature distribution, entropy generation, and Bejan number are portrayed graphically and discussed.

Dual Entropy Regime in Channel Flow Subjected to Temperature Dependent Convection Mechanism

“…Vyas and his co-authors [9][10][11][12][13][14][15] investigated entropy generation in various thermo-fluidic configurations. Chinyoka and Mankinde [16] presented an entropy generation analysis for an unsteady channel flow.…”

Thermodynamic analysis of a variable viscosity reactive hydromagnetic couette flow within parallel plates

“…To buttress the significant study on Couette flow, Makinde et al (2015) employed the first two laws of thermodynamics to examine the flow and thermal dissipation in MHD variable viscosity flow of a Couette flow in a spinning system. Other investigations on Couette flow and other physical properties are extensively presented in Makinde (2014), Theuri and Makinde (2014), and Vyas and Ranjan (2015).…”

Entropy generation in an inclined porous channel with suction/injection

“…Using local similarity solution technique and shooting quadrature, Makinde [11] numerically investigated second law analysis for variable viscosity hydro-magnetic boundary layer ow with thermal radiation and Newtonian heating while in conjunction with Aziz [12] presented a numerical study of Second law analysis for a variable viscosity plane Poiseuille ow with asymmetric convective cooling using an e cient numerical shooting technique with a fourth order Runge-Kutta algorithm. Vyas and Ranjan [13] analytically examined entropy analysis for MHD generalized Couette ow in a composite duct. In another work, using entropy generation analysis, the mixed convection ow between two vertical concentric pipes with constant heat ux at the boundaries and MHD ow e ects is considered by Mahian et al [14].…”