Analysis of entropy generation in the nonlinear thermal radiative micropolar nanofluid flow towards a stagnation point with catalytic effects

Abstract

The major goal of this work is to analyze the entropy generation in a micropolar nanofluid’s hydromagnetic stagnation point flow with the involvement of the catalytic and nonlinear thermal radiation effects. The magnetite nanoparticle Fe3O4 is added to the water to form the Fe3O4-water nanofluid. A vertical stretchable sheet is assumed to initiate the two-dimensional time-independent flow. The impacts of Joule heating and viscous dissipation are considered in the development of the governing equations of the concerned problem. An appropriate procedure of similarity transformations is implemented in the system of partial differential equations (PDE) to establish the nonlinear setup of ordinary differential equations (ODE). The behavior of various aspects of fluid such as micro-rotation, entropy generation, temperature, velocity, Bejan number, and concentration relative to the pertinent parameters is graphically revealed. The graphical nature of local Nusselt number and skin friction relative to the physical parameters is also exhibited in this analysis. This study concludes that the amplification in the magnetic field develops a minimization in the velocity field. The Bejan number shows the declining behavior corresponding to the larger quantities of the Brinkman number and Reynolds number, but the entropy of the system escalates for these parameters.

The Influence of Saturated and Bilinear Incidence Functions on the Dynamical Behavior of HIV Model Using Galerkin Scheme Having a Polynomial of Order Two

“…15 and 16 for C(t), and A(t), respectively. The basic flow equations of Nano liquid are [34][35][36][37][38][39]:…”

“…With bounded conditions [34,36,37,40] ũ| y=0 = u w = cx, ṽ| y=0 = −v 0 , w| y=0 = 0, T| y=0 = Tw , C| y=0 = Cw ũ| y=h = 0, ṽ| y=h = 0, w| y=h = 0, T| y=h = Tl , C| y=h = Cl .…”

Transportation of Fe3O4-SiO2-Al2O3/EO and SiO2-Al2O3/EO nanoparticles in magnetized Reiner–Philippoff liquid, including modified fluxes via Galerkin algorithm: Significance of EMHD

“…The time-independent, significant 2D flow demeanor is supposed to start with a vertically stretchable sheet. When creating the governing equations for the relevant issue, the Joule heating and viscous dissipation impacts are considered, as described previously [18]. Using updated heat and mass flux models, the entropy production approach is subjected to Maxwell nanofluid incorporated with gyrotactic microorganisms influenced by homogeneous-heterogeneous processes.…”

Fractional Nadeem trigonometric non-Newtonian (NTNN) fluid model based on Caputo-Fabrizio fractional derivative with heated boundaries

“…They concluded that the velocity of the system diminishes relative to the higher magnitude of the uid parameter. The heat transfer mechanism and chemical reactive ow phenomenon in uenced by different physical circumstances in a non-Newtonian uid were scrutinized by Ishtiaq et al [10]. The non-Newtonian model of Sisko uid with variable characteristics was demonstrated by Ahmad et al [11].…”