2 research outputs found
Irreversibility analysis for reactive third-grade fluid flow and heat transfer with convective wall cooling
Inherent irreversibility in the flow of a reactive third grade fluid though a channel with convective heating is examined. It is well known that heat dissipated from the exothermic chemical reaction passes through fluid in an irreversible manner and as a result entropy is generated continuously within the channel. Analytical solutions of the resulting dimensionless non-linear boundary-value-problems arising from the governing equations were obtained by using a perturbation method. These solutions are utilized to obtain the entropy generation rate and Bejan number for the system. The influence of various important parameters on the entropy generation rate and Bejan number are shown graphically and discussed accordingly
Differential transform solution for hall and ion slip effects on radiative-convective casson flow from a stretching sheet with convective heating
Magnetohydrodynamic (MHD) materials processing is becoming increasingly popular in the 21st
century since it offers significant advantages over conventional systems including improved
manipulation of working fluids, reduction in wear and enhanced sustainability. Motivated by these
developments, the present work develops a mathematical model for Hall and Ion slip effects on
non-Newtonian Casson fluid dynamics and heat transfer towards a stretching sheet with a
convective heating boundary condition under a transverse magnetic field. The governing
conservation equations for mass, linear momentum and thermal (energy) are simplified with the
aid of similarity variables and Ohm’s law. The emerging nonlinear coupled ordinary differential
equations are solved with an analytical technique known as the differential transform method
(DTM). The impact of different emerging parameters is presented and discussed with the help of
graphs and tables. Generally aqueous electro-conductive polymers are considered for which a
Prandtl number of 6.2 is employed. With increasing Hall parameter and ion slip parameter the flow
is accelerated whereas it is decelerated with greater magnetic parameter and rheological (Casson)
fluid parameter. Skin friction is also decreased with greater magnetic field effect whereas it is
increased with stronger Hall parameter and ion slip parameter values