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Journal of Porous Media
Facteur d'impact: 1.49 Facteur d'impact sur 5 ans: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

ISSN Imprimer: 1091-028X
ISSN En ligne: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v20.i3.40
pages 227-247

HEAT TRANSFER AND ENTROPY GENERATION IN POROUS MICRODUCT WITH SLIP BOUNDARY CONDITION USING LATTICE BOLTZMANN METHOD UNDER NONEQUILIBRIUM CONDITIONS

Raja Rabhi
Laboratoire d'Etudes des Systèmes Thermiques et Energétiques, Université de Monastir, Ecole Nationale d'Ingénieurs de Monastir, Rue Ibn Eljazzar, 5019 Monastir, Tunisia
Bayssain Amami
Laboratoire d'Etudes des Systèmes Thermiques et Energétiques, Université de Monastir, Ecole Nationale d'Ingénieurs de Monastir, Rue Ibn Eljazzar, 5019 Monastir, Tunisia
Hacen Dhahri
Laboratory of Thermal and Energy Systems Studies, National School of Engineers, Monastir University, Monastir, Tunisia
Abdallah Mhimid
University of Monastir, Thermal System Energetic Laboratory Research (LESTE), National School Engineering of Monastir, Avenue Ibn Jazzar, 5019 Tunisia

RÉSUMÉ

Solar water heating systems prove to be an effective technology for converting solar energy into thermal energy. The efficiency of solar thermal conversion is important compared to solar electrical direct conversion systems. Therefore this paper improves numerically the thermal efficiency of solar water heaters wherein we try to improve the convective heat transfer. The Darcy-Brinkman-Forchheimer (DBF) model is used to establish momentum equations for porous media, while the local thermal nonequilibrium model is adopted to represent the fluid–solid energy exchange. The solutions for velocity and temperature are obtained considering the viscous dissipation effect. This study details the effects of variations in the Knudsen number, Darcy number, and other dimensionless numbers on the velocity, temperature, Nusselt number, and entropy generation to illustrate important fundamental and practical results. In fact, using porous materials with high permeability, including viscous dissipation, enhances heat transfer.


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