The additive effects of various convection flows saturated in porous media using Cu–water nanofluid: entropy analysis

Abstract

The current simulations treat impacts of the thermal radiation on some natural convective process and entropy generation along a vertical surface impeded in a non-Darcy porous medium. Various convective practicabilities are due to various thermal boundary conditions, namely, isothermal surface with horizontal leading edge C1, uniform surface with horizontal leading edge C2, an adiabatic surface with a concentrated heat source along the horizontal leading edge C3 and a plane plume rising from a horizontal thermal source C4. Beside the boundary conditions, these convection modes are characteristic with a power index such that refers to C1, refers to C2 and refers to C3 and C4. The worked mixture is Cu-water nanofluid. The dependent variables are expanded in terms of small parameters and those are function in the permeability parameter. Numerical imitations are carried out for several of the radiation parameter concentration of the nanoparticles and the porosity of the porous medium The outcomes disclosed that, for all the considered cases, profiles of the temperature, velocity, Bejan number and entropy are enhanced as the radiation parameter is increased. In C1 (isothermal case) the zero-order of the skin friction and the Nusselt coefficient are augmented as is varied. In the same context, in C1, the growing in the radiation coefficient from 0 to 2 results in an increase in the zero-order of the skin friction by 9.4%.

Impact of thermal and solute source-sink combination on thermosolutal convection in a partially active porous annulus

“…Rajabi et al [29] studied global sensitive analysis of dual buoyancy convection in a cavity and reported that for the heatdriven motion case, the concentration field is highly influenced by Lewis number rather than Rayleigh number. The effect of various thermal conditions on convective flow and entropy generation of nanofluid saturated porous medium has been analyzed and reported that temperature, velocity, entropy profiles enhance as the radiation parameter is increased [30]. Further, Hu and Mei [31] analyzed the impact of dual buoyancy forces on fluid movement numerically as well as analytically and concluded that the moisture and thermal transport rates are influenced by time-periodic temperature.…”

Thermosolutal Marangoni convection of Bingham non‐Newtonian fluids within inclined lid‐driven enclosures full of porous media

“…[32–44] and Refs. [45,46] introduced comprehensive studies in the area of internal flows with various thermal conductions.…”

Exothermic impact on Eyring-Powell nanofluid flow through a heated surface embedded in porous medium with thermal radiation: a numerical study

“…Brownian and thermo diffusion proved to be the most effective slip mechanisms in nanofluids out of all the aforesaid seven slip mechanisms. Several studies in literature are present which offer the very recent research on nanofluid flows [23][24][25][26][27][28][29].…”