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Journal of Porous Media
Импакт фактор: 1.752 5-летний Импакт фактор: 1.487 SJR: 0.43 SNIP: 0.762 CiteScore™: 2.3

ISSN Печать: 1091-028X
ISSN Онлайн: 1934-0508

Выпуски:
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Journal of Porous Media

DOI: 10.1615/JPorMedia.v8.i1.10
pages 1-12

Numerical Study of the Effects of Geometric Dimensions on Liquid-Vapor Phase Change and Free Convection in a Rectangular Porous Cavity

Mustapha Najjari
Laboratoire d'Etudes des Systemes Thermiques et Energetiques, Cite Riadh, Zirig 6072 Gabes, Tunisia
Sassi Ben Nasrallah
Laboratoire d'Études des Systèmes Thermiques et Énergétiques, Ecole Nationale d'Ingénieurs de Monastir, Monastir 5019 Tunisie

Краткое описание

By using an enthalpic method (two-phase mixture model), we have studied numerically liquid-vapor phase change with free convection in a rectangular porous cavity heated from below, cooled from above, and initially saturated with liquid phase. A finite-volume method is used for the numerical resolution of the volumetric enthalpy and pressure equations. Results giving evolution of temperature, velocities of the liquid and vapor, and evaporated volume are presented and analyzed. Parametric studies to assess the effects of aspect ratio of cavity are carried out. Special attention is paid to studying the complex interaction between free convection and liquid-vapor phase-change intensity.


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