Unsteady mixed convection boundary layer flow along a symmetric wedge with variable surface temperature embedded in a saturated porous medium

Abstract

Purpose – The purpose of this paper is to study laminar two-dimensional unsteady mixed-convection boundary-layer flow of a viscous incompressible fluid past a symmetric wedge embedded in a porous medium in the presence of the first and second orders resistances. Design/methodology/approach – The governing boundary-layer equations along with the boundary conditions are first converted into dimensionless form by a non-similar transformation, and then resulting system of coupled non-linear partial differential equations were solved by perturbation solutions for small dimensionless time until the second order. Numerical solutions of the governing equations are obtained employing the implicit finite-difference scheme in combination with the quasi-linearization technique. The obtained results will be compared with earlier papers on special cases of the problem to examine validity of the method of solution. Findings – The effects of various parameters on the fluid velocity and fluid temperature as well as the wall heat transfer rate and skin-friction coefficient are presented graphically and in tabulated form. Originality/value – The study of heat transfer in porous media has been attracted the attention of many researchers in recent times due to the utmost importance in many different applications, including physical, geophysical and chemical applications. Also in different areas of engineering and modern purposes as oil refining, pollution of the air with poison gas, the process of mineral extraction, the design water tanks and study volcanic activity. Also has many uses in medicine, modern science, food products, textiles and ion exchange.

Magnetohydrodynamic and Thermal Performance of Electrically Conducting Fluid along the Symmetrical and Vertical Magnetic Plate with Thermal Slip and Velocity Slip Effects

“…Such factors are crucial, particularly in the metallurgical processes that include the purifying of metallic materials from nonmetallic impurities and the cooling of consecutive strips and filaments dragged through a quiescent fluid. Due to its important impact in numerous fields, especially the mechanical, geomagnetic, and pesticide sciences, the research of heat transport in porous materials has recently attracted the attention of many scientists using vertical geometries by [6]. They found that a higher local Nusselt number increases the impact of viscous parameters over the surface.…”

Effect of Magnetic Field on Unsteady Free Convection Flow Over a Vertical Wavy Surface

“…Also Kumari et al 10 investigated free convection boundary layer flow of a non-Newtonian fluid along a vertical wavy surface. The extension of mixed-convection boundary-layer flow along a symmetric wedge with variable surface temperature embedded in a saturated porous median was explored by Al-Harbi and Ibrahim 11 . The magneto hydrodynamics mixed convection flow over a permeable non-isothermal wedge was analyzed by Prasad et al 12 in the presence of variable thermal conductivity.…”

Unsteady Falkner-Skan flow of fractional Maxwell fluid towards a stretched wedge with buoyancy effects

“…Furthermore, researchers are particularly interested in the characteristics of unsteady Falkner-Skan wedge flow. In 2015, Saleh et al[3] considered an unsteady flow of viscous fluid towards a stretching wedge with thermal radiation effects. Alam et al[4] discussed the unsteady forced convective flow of Newtonian fluid along stretching/shrinking wedge in 2016.…”