Abstract
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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