Heat transport and stagnation‐point flow of magnetized nanoliquid with variable thermal conductivity, Brownian moment, and thermophoresis aspects

Abstract

The improvement of heat transport is a very important phenomenon in nuclear reactors, solar collectors, heat exchangers, and coolers, which can be achieved by choosing the nanofluid as the functional fluid. Nanofluids improve thermophysical properties; as a result, they have made great progress in engineering, biomedical, and industrial applications. Therefore, a numerical study has been proposed to analyze the flow and heat transport of nanoliquids over an extendable surface near a stagnation point with variable thermal conductivity under the influence of the magnetic field, due to their importance in the engineering field. Nanoliquid attributes explain the Brownian motion and the diffusion of thermophoresis. The effects of the chemical reaction and the uniform internal heat source/heat sink are also considered. The Nachtsheim‐Swigert shooting procedure based on the Runge‐Kutta scheme is used for numerical calculation. The impact of effective parameters on velocity, temperature, and volume fraction of the nanoparticles is shown in the graphs and reported in detail. The surface criteria are also estimated with respect to the shear stress and the rate of heat and mass transfer. The aspects of the Brownian moment and Lorentz force are positively correlated to the thermal field of the nanoliquid. Also, the variable thermal conductivity aspect favors the growth of the thermal boundary layer.

Numerical analysis of MHD nanofluid flow over a wedge, including effects of viscous dissipation and heat generation/absorption, using Buongiorno model

“…The thermophoresis along with random motion characteristics of radiative Casson fluid flow, including gyrotactic microorganisms driven by a moving wedge, has been acknowledged by Raju et al 6 They found that thermal and concentration profiles are boosted by the escalating value of thermophoresis parameter, whereas Brownian motion parameter showed a reverse trend for the thermal boundary layer. Recently, many researchers have explored the influences of random motion features of nanosized particles and thermophoresis on the flow of nanofluid using Buongiorno's model at different geometries 7–15 . Although, recent years have observed the rise in the number of investigators exploring the flow and heat transfer problems utilizing wedge surfaces due to its assorted feasible functions in the area of manufacturing, high‐speed thermal aerodynamics, fiber technology, nuclear cooling system, and so on.…”

A computational analysis of heat transport irreversibility phenomenon in a magnetized porous channel

“…To find the solutions [equations ( 8)-( 11)] of velocity and temperature distributions, we have used the numerical technique along with the numerical resolution support. Many other techniques for solving the above equations are available in the literature (Farhan et al, 2020;Raza et al, 2019aRaza et al, , 2019bSwain et al, 2020;Hamrelaine et al, 2019;Raza et al, 2019aRaza et al, , 2019bAlkasassbeh et al, 2019). The concept of velocity and temperature fields at every point is required to estimate the local entropy generation [equation ( 19)] for the considered problem.…”

Numerical Scrutinization of Darcy-Forchheimer Relation in Convective Magnetohydrodynamic Nanofluid Flow Bounded by Nonlinear Stretching Surface in the Perspective of Heat and Mass Transfer

“…An interesting study of Mustafa et al [ 4 ] disclosed an analysis on stagnation spot flow of nanofluids involving linear stretched sheet. For more details on this topic, one can see [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ] and cross references cited therein.…”