Enhanced discrete ordinates approach for mitigating shadowing effects in obstructed gas-filled spaces: Implications for astrophysical and industrial applications DOI Creative Commons
Taoufik Gassoumi,

Umar Fahed Alqsair,

Rachid Saïd

et al.

Results in Engineering, Journal Year: 2024, Volume and Issue: 23, P. 102728 - 102728

Published: Aug. 23, 2024

This article introduces a novel quadrature scheme for the discrete ordinates method (DOM) called Uniform Constant Weight Quadrature (UCWQ). A new version of has been developed to address shadowing effects in gas-filled enclosures with obstructions. The UCWQ method*, featuring pyramidal mesh within set, meets criteria zeroth, first, and second moments is symmetric any axis. In comparison standard SN quadrature, allows unlimited angular refinement, thereby preventing distortions temperature radiative flux profiles caused by effects. demonstrates high performance calculating propagation through semi-transparent medium situated between two concentric spheres. technique can be easily adopted study wide range industrial applications, as well various astrophysical systems, such stellar atmospheres structures interstellar medium. It also used radiation contribution greenhouse gases atmospheric pollution layers.

Language: Английский

A comprehensive numerical analysis of heat transfer enhancement in NEPCM-water mixtures using oscillating fin and oriented magnetic fields DOI Creative Commons
Mohammed Azeez Alomari, Ahmed M. Hassan, Abdullah F. Alajmi

et al.

International Communications in Heat and Mass Transfer, Journal Year: 2024, Volume and Issue: 161, P. 108455 - 108455

Published: Dec. 7, 2024

Language: Английский

Citations

4
Numerical analysis of coupled fluid-structure interaction in magnetohydrodynamic flow and phase change process of nano-encapsulated phase change material systems with deformable heated surface DOI Creative Commons
Ahmed M. Hassan, Mohammed Azeez Alomari, Abdalrahman Alajmi

et al.

Case Studies in Thermal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 106131 - 106131

Published: April 1, 2025

Language: Английский

Citations

0
Computational analysis of magnetohydrodynamic buoyancy-driven flow and thermal transmission within a circular dome-shaped porous enclosure using finite difference scheme DOI
Hyunju Kim,

K. Thirumalaisamy,

K. Venkatadri

et al.

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

Published: April 17, 2025

Purpose Heat transfer efficiency is crucial for enhancing device performance across various engineering and industrial sectors, including high-performance heat exchangers, solar collectors, electronic components, nuclear reactors, space thermal management lithium-ion batteries, which have posed challenges in recent years. Natural convection one of the significant ways to boost cooling these domains. Motivated by this application, study aims examine flow a porous circular dome-shaped cavity under influence Lorentz force radiation. Design/methodology/approach Designing model plays an important role performance, will considerable impact on energy usage. The partial differential equations are discretized using finite difference approximation. computational simulations been conducted different key parameter values Rayleigh numbers (10 3 ≤ Ra 10 6 ), Darcy −4 Da −1 radiation parameters (0 Rd 5), generation/absorption coefficient (−5 Q 5) Hartmann Ha 30). temperature distributions analyzed presence absence radiation, as well generation absorption. Findings Remarkably, intriguing observations noticed circulation when applying high magnetic forces within domain. velocity increases significantly with rise buoyancy-driven number. As number boosts from –10 , average rate improves 134.38%, while it decreases 84.92% augmenting 0 30. transmission monotonically enlarging source parameters, insignificant changes sink parameter. Practical implications findings investigation can be beneficial controlling characteristics applications, equipment’s such steam generator tubes power collectors. Originality/value To best authors’ knowledge, researchers not yet examined magnetohydrodynamic free fluid distribution porous, circular, enclosure influenced source/sink

Language: Английский

Citations

0
Enhanced natural convection in a U-shaped baffled cavity: Synergistic effects of magnetic fields and wall oscillations on Nano-encapsulated PCM DOI Creative Commons
Ahmed M. Hassan, Mohammed Azeez Alomari, Abdullah F. Alajmi

et al.

International Communications in Heat and Mass Transfer, Journal Year: 2025, Volume and Issue: 165, P. 109051 - 109051

Published: May 9, 2025

Language: Английский

Citations

0
Enhancing Heat Transfer Efficiency Through Controlled Magnetic Flux in a Partially Heated Circular Cavity Using Multi-Walled Carbon Nanotube Nanofluid and an Internal Square Body DOI Open Access
Eid S. Alatawi

Sustainability, Journal Year: 2024, Volume and Issue: 16(23), P. 10632 - 10632

Published: Dec. 4, 2024

Applications including aircraft systems and electronics cooling depend on effective heat transfer. This study investigates magnetohydrodynamic (MHD) free convection thermal radiation for transfer in a circular cavity filled with multi-walled carbon nanotube (MWCNT) nanofluid containing square obstruction. examines the impact of internal geometry fluid flow dynamics under three distinct boundary conditions, it presents comprehensive analysis based wide range Hartmann (Ha) Rayleigh (Ra) numbers. MWCNT high conductivity was employed to enhance efficiency, using solid volume fraction (SVF) 4% MWCNTs assuming Newtonian behavior computational simplification. Magnetic properties were imparted by dispersion nanotubes base magnetic nanoparticles. Other walls insulated, bottom wall heated, field (MF) Ha ranging from 0 100 applied. It observed that raising Ra 103 106 improved Nusselt number (Nu) 0.08 7.1 Galerkin finite element method. increased reduced Nu 35%. Three conditions body showed heated provided largest Nu. By means an increase SVF 0.04, 18%. Radiation effects parameter Rd = 0.5 transmission 22%. These results underline importance considering MHD characteristics maximizing commercial purposes, approaches this contribute deeper understanding influence geometry.

Language: Английский

Citations

1
Numerical analysis of NE-phase change material and water mixture in a chamfered cavity with flexible fin DOI
Mohammed Azeez Alomari, Ahmed M. Hassan,

Hawkar Birdawod

et al.

International Communications in Heat and Mass Transfer, Journal Year: 2024, Volume and Issue: 161, P. 108520 - 108520

Published: Dec. 20, 2024

Language: Английский

Citations

1
Enhanced discrete ordinates approach for mitigating shadowing effects in obstructed gas-filled spaces: Implications for astrophysical and industrial applications DOI Creative Commons
Taoufik Gassoumi,

Umar Fahed Alqsair,

Rachid Saïd

et al.

Results in Engineering, Journal Year: 2024, Volume and Issue: 23, P. 102728 - 102728

Published: Aug. 23, 2024

This article introduces a novel quadrature scheme for the discrete ordinates method (DOM) called Uniform Constant Weight Quadrature (UCWQ). A new version of has been developed to address shadowing effects in gas-filled enclosures with obstructions. The UCWQ method*, featuring pyramidal mesh within set, meets criteria zeroth, first, and second moments is symmetric any axis. In comparison standard SN quadrature, allows unlimited angular refinement, thereby preventing distortions temperature radiative flux profiles caused by effects. demonstrates high performance calculating propagation through semi-transparent medium situated between two concentric spheres. technique can be easily adopted study wide range industrial applications, as well various astrophysical systems, such stellar atmospheres structures interstellar medium. It also used radiation contribution greenhouse gases atmospheric pollution layers.

Language: Английский

Citations

0