Convective Heat Transfer Performance of Hybrid Nanofluid in a Wavy-walled Thermal System with Localized Heating
Keywords:
MHD, Hybrid nanofluid, Compact scheme, Localized heating, Wavy-walled cavity.Abstract
This work ahead deals with the impact of magnetic field dependent viscosity (MFDV) on natural convection heat transfer of Ag - MgO (50%-50%) water hybrid nanoliquid. The considered thermal system is a wavy-walled cavity with heat source placed at bottom wall. The governing equations (Navier-Stokes equations) constituting streamfunction (y)- vorticity (z) formulation with energy equation are solved by adopting a compact finite difference fourth order scheme. Meanwhile, the flow domain which is influenced by several factors including Hartmann number (10 < Ha < 50), hybrid nanoparticles volume fraction (0 < jhnp < 0.02), Rayleigh number (104 < Ra < 106), orientation angle of magnetic field (00 < g < 900), magnetic number (0 < d0 < 1), different configurations (Configuration-I and Configuration-II) and internal heat generation or absorption (-5 < Q < 5) is analyzed generously. Experimentally based correlations for thermal conductivity and dynamic viscosity have been used throughout the study. The objective of this study is to design a thermal system with better thermal performance. The results are analyzed through streamlines and isotherms contour plots and average Nusselt numbers. The fluid flow and heat transfer are significantly influenced by buoyancy force, heat generation/absorption coefficient The outcomes show that the geometric parameters can be used as an excellent controller of the thermal performance inside the wavy chamber.
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