Numerical simulation and energy flux vector visualization of radiative-convection heat transfer in a porous triangular enclosure

Venkatadri, K, Beg, OA ORCID: https://orcid.org/0000-0001-5925-6711, Rajarajeswari, P, Prasad, VR, Rao, AS and Khan, MBH 2020, 'Numerical simulation and energy flux vector visualization of radiative-convection heat transfer in a porous triangular enclosure' , Journal of Porous Media, 23 (12) , pp. 1187-1199.

[img] PDF - Accepted Version
Restricted to Repository staff only until 29 October 2021.

Download (1MB) | Request a copy

Abstract

A detailed theoretical examination laminar natural convection heat flow in a triangular porous cavity with significant radiative heat transfer and porosity variation is presented. Twodimensional laminar incompressible flow is considered with the left slant and right walls are low and high temperature respectively, and the remaining (top) wall prescribed as adiabatic. The Darcy-Brinkman isotropic model is utilized, and the coupled governing equations are solved by a numerical method utilizing finite differences. Visualization of isotherms and streamlines is achieved with the method of Energy Flux Vectors (EFVs). The impacts of the different model parameters (Rayleigh number Ra, Darcy number-Da, porosity-E and radiation parameter-Rd) on the thermo fluid characteristics are studied in detail. The computations show that convective heat transfer is enhanced with greater Darcy parameter (permeability) which also leads to intensification in the density of energy flux vector patterns. The flow is accelerated with increasing buoyancy effect (Rayleigh number) and temperatures are also increased with greater radiative flux. Average Nusselt number is decreased with higher porosity. The simulations are relevant to hybrid porous media solar collectors.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Journal of Porous Media
Publisher: Begell House Publishers
ISSN: 1091-028X
Related URLs:
Depositing User: OA Beg
Date Deposited: 23 Oct 2020 07:35
Last Modified: 17 Nov 2020 08:05
URI: http://usir.salford.ac.uk/id/eprint/58623

Actions (login required)

Edit record (repository staff only) Edit record (repository staff only)

Downloads

Downloads per month over past year