Heat Transfer and Natural Convection in an Internally Heated Porous Box Container With Variable Gravity Field DOI
Amit Mahajan,

Madhvi Raj

Heat Transfer, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

ABSTRACT The study focuses on convection within a fluid‐saturated porous medium, which is internally heated, with gravitational field that changes height across the enclosure. Four distinct configurations of gravity variation and constant volumetric internal heating are selected, their impact onset analyzed four different models. primary aim to examine influence key parameters such as Rayleigh numbers 60, 70, 80, 100, 105, 110, parameter ranging from 0 0.06 heat between 0.1 0.4, dimensionless time concerning temperature transfer. formulated differential equation numerically solved using Galerkin method. MATLAB's built‐in solver, ode45, used for numerical simulations evaluate transfer rate generate two‐ three‐dimensional isotherms multidimensional models under varying fields, showing novelty our solutions. These elevate Nusselt number, signaling enhanced facilitating by destabilizing system. oscillations needed number stabilize fewer in vertical enclosure than other parameters, numbers. This analysis relevant material processing applications.

Language: Английский

Effect of impinging jet cooling and thermal radiation on magnetohydrodynamic mixed convection and entropy generation in a semicircular porous channel DOI
Aniket Halder, Arabdha Bhattacharya, Mikhail А. Sheremet

et al.

International Journal of Numerical Methods for Heat &amp Fluid Flow, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

Purpose This study aims to examine magnetohydrodynamic mixed convective phenomena and entropy generation within a semicircular porous channel, incorporating impinging jet cooling the effects of thermal radiation. The present analyzes complex flow dynamics heat transfer characteristics highly diluted 0.1% (volume) concentration Cu–Al 2 O 3 /water hybrid nanofluid, based on findings from previous studies. investigation is intended support development effective management systems across diverse industries, such as electronic devices enhanced energy system applications. Design/methodology/approach incorporates heated curved bottom wall nanofluid central top inlet, with two horizontal exit ports along rectangular duct. Finite element-based simulations are conducted using COMSOL Multiphysics, single-phase homogeneous model justified by earlier works. method uses experimental data conductivity viscosity, emphasizing evaluation performance in scenarios involving intricate geometries multiphysical conditions. nondimensional variables Reynolds number (Re), modified Rayleigh (Ra m ), Hartmann (Ha), Darcy (Da) radiation parameter while maintaining constant volume fraction. A grid independence code validation were performed ensure numerical accuracy. Findings analysis indicates that elevated Re contribute lessening boundary layer thickness, prompting separation significantly amplifying average Nusselt number. enhancement, coupled an overall reduction total generation, diminishes rising Ha. However, optimized combinations higher values for Ra Da yield improved performance, particularly pronounced increasing Radiative exerts detrimental impact both production. Practical implications While captures key macroscopic differentiating nanofluids base fluids, it does not provide insights at nanoparticle level. Future studies could incorporate two-phase models capture particle-level dispersion effects. In addition, would strengthen study’s conclusions. Originality/value work represents innovative perspectives efficient hydrothermal systems, accounting influences radiation, media geometry. results offer critical enhancing efficiency real-world applications, especially sectors demanding advanced solutions.

Language: Английский

Citations

1
Editorial: Advances in Heat Transfer Science: Enhanced Techniques for Modern Industrial Applications DOI Creative Commons
Ali Alahmer, Ahmed Al-Manea, Raed Al-Rbaihat

et al.

International Journal of Thermofluids, Journal Year: 2025, Volume and Issue: unknown, P. 101145 - 101145

Published: Feb. 1, 2025

Language: Английский

Citations

0
Heat Transfer and Natural Convection in an Internally Heated Porous Box Container With Variable Gravity Field DOI
Amit Mahajan,

Madhvi Raj

Heat Transfer, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

ABSTRACT The study focuses on convection within a fluid‐saturated porous medium, which is internally heated, with gravitational field that changes height across the enclosure. Four distinct configurations of gravity variation and constant volumetric internal heating are selected, their impact onset analyzed four different models. primary aim to examine influence key parameters such as Rayleigh numbers 60, 70, 80, 100, 105, 110, parameter ranging from 0 0.06 heat between 0.1 0.4, dimensionless time concerning temperature transfer. formulated differential equation numerically solved using Galerkin method. MATLAB's built‐in solver, ode45, used for numerical simulations evaluate transfer rate generate two‐ three‐dimensional isotherms multidimensional models under varying fields, showing novelty our solutions. These elevate Nusselt number, signaling enhanced facilitating by destabilizing system. oscillations needed number stabilize fewer in vertical enclosure than other parameters, numbers. This analysis relevant material processing applications.

Language: Английский

Citations

0