Numerical study of boiling and natural convection in capillary porous media using the two-phase mixture model

C. Y. Wang, C. Beckermann, C. Fan

Research output: Contribution to journalArticle

54 Scopus citations

Abstract

A newly developed two-phase mixture model is applied, in conjunction with a control-volume-based finite difference method, to numerically investigate boiling with thermal convection in a porous layer heated from below. The numerical procedure employs a fixed grid and avoids tracking explicitly the moving interface between the liquid and two-phase regions. Numerical results are obtained to shed light on the intricate interactions between boiling and natural convection as well as to explain experimental observations. Four distinct flow patterns that were observed in previous experiments are predicted. A quantitative comparison of the predicted and measured vapor volume fraction in the porous bed shows good agreement. The numerical results also agree with published linear stability results. In addition, the present study documents the effects of important parameters such as Rayleigh number, bottom heat flux, and aspect ratio.

Original languageEnglish (US)
Pages (from-to)375-398
Number of pages24
JournalNumerical Heat Transfer; Part A: Applications
Volume26
Issue number4
DOIs
StatePublished - Oct 1994

All Science Journal Classification (ASJC) codes

  • Numerical Analysis
  • Condensed Matter Physics

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