http://localhost:8080/xmlui/handle/123456789/216 Sun, 26 Apr 2026 08:14:37 GMT 2026-04-26T08:14:37Z http://localhost:8080/xmlui/handle/123456789/3275 Title: Mixed convection in a doubly stratified micropolar fluid saturated non-Darcy porous medium Authors: Srinivasacharya, D.; Ramreddy C., C. Abstract: The effects of thermal and solutal stratification on mixed convection along a vertical plate embedded in a micropolar fluid saturated non-Darcy porous medium are analysed. The nonlinear governing equations and their associated boundary conditions are initially cast into dimensionless forms by pseudo-similarity variables. The resulting system of equations is then solved numerically using the Keller-box method. The numerical results are compared and found to be in good agreement with previously published results as special cases of the present investigation. The velocity, microrotation, temperature and concentration profiles are shown for different values of the coupling number, non-Darcy parameter, mixed convection parameter, thermal and solutal stratification parameters. The numerical values of the skin friction, wall couple stress, heat and mass transfer rates for different values of governing parameters are also tabulated. © 2011 Canadian Society for Chemical Engineering Description: NITW Sat, 01 Oct 2011 00:00:00 GMT http://localhost:8080/xmlui/handle/123456789/3275 2011-10-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/3268 Title: Cross–diffusion effects on mixed convection from an exponentially stretching surface in non–Darcy porous medium Authors: Srinivasacharya, D.; Ramreddy, C. Abstract: The Soret and Dufour effects on mixed convection flow and heat and mass transfers from an exponentially stretching surface in a quiescent fluid–saturated non–Darcy porous medium is studied. Stretching velocity, wall temperature, and wall concentration are assumed to have specific exponential function forms. The governing partial differential equations are transformed into ordinary differential equations using similarity transformations and then solved numerically using an implicit finite difference scheme known as the Keller–box method. The present results are found to be in excellent agreement with previously published work on various special cases of the problem. The influence of buoyancy, Soret and Dufour numbers, and Darcy and non–Darcy parameters on the convective transport in the boundary layer region is analyzed. Also, the numerical values of the skin friction, heat, and mass transfer coefficients for different values of governing parameters are also tabulated. Description: NITW Tue, 01 Jan 2013 00:00:00 GMT http://localhost:8080/xmlui/handle/123456789/3268 2013-01-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/3260 Title: A model of two mutually interacting species with limited resources of first species and unlimited for second species Authors: Ravindra Reddy, B.; Phani Kumar, N.; Pattabhiramacharyulu, N.C. Abstract: The present paper concerns with a model of two mutually interacting species with limited resources for first species and unlimited resources for second species. The model is characterized by a coupled system of first order non-linear ordinary differential equations. In this case, we have identified two equilibrium points and described their stability criteria. Solutions for the linearized perturbed equations are also found and explained their significance. Under the limited and unlimited resources for first and second species respectively, if the death rate is greater than the birth rate for both the species, it is found that there are two equilibrium points. The stability criteria for these equilibrium points are derived and further the solutions of the linearized perturbed equations are found and illustrated. Description: NITW Sat, 01 Jan 2011 00:00:00 GMT http://localhost:8080/xmlui/handle/123456789/3260 2011-01-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/3250 Title: Entropy generation analysis of the flow of twoimmiscible couple stress fluids between two porous beds Authors: Srinivas, J.; Murthy, J. V. Ramana; Sai, K. S. Abstract: This paper investigates the entropy generation analysis in a steady flow of two immiscible couple stress fluids in a horizontal channel bounded by two porous beds at the bottom and top. The flow is considered in four zones: zone IV contains the flow of viscous fluid in the large porous bed with low permeability at the bottom, zones I and II contain free flow of two immiscible couple stress fluids, and zone III contains the flow of viscous fluid in the thin porous bed with high permeability at the top. The flow is assumed to be governed by Stokes’s couple stress fluid flow equations in the free channel. In zone IV, Darcy’s law together with the Beavers-Joseph (B-J) slip condition at the interface is used, whereas in zone III Brinkman’s model is used for flow. The walls of the channel are maintained at constant and different temperatures higher than that of the fluid. The closed-form expressions for velocity and temperature are derived analytically, and these are used to compute the dimensionless expressions for the entropy generation number and Bejan number. The effects of relevant parameters on velocity, temperature, entropy generation number, and Bejan number are analyzed and presented through graphs. It is observed that the porous plates act as smooth surfaces and reduce the viscous friction. Description: NITW Thu, 01 Jan 2015 00:00:00 GMT http://localhost:8080/xmlui/handle/123456789/3250 2015-01-01T00:00:00Z