Numerical investigation of thermofluid flow characteristics with phase change against high heat flux in porous media

K. Yuki, J. Abei, Hidetoshi Hashizume, S. Toda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study numerically evaluates thermofluid flow characteristics in porous media by a newly developed "modified two-phase mixture model" applying a two-energy model instead of an one-energy model. In a single-phase flow case, thermal nonequilibrium between a solid phase and a fluid phase is observed in the area where inlet heat conducts from a heating wall and further convective heat transfer is more active. Though the degree of thermal nonequilibrium has a positive correlation with the increase inflow velocity and inlet heat flux, the degree is very low and can be ignored, from an engineering perspective. In a case of two-phase flow, the thermal nonequilibrium is remarkable in the two-phase region because the solid-phase temperature in this region is far beyond saturation temperature. A difference between these two models is obvious especially in the two-phase flow case, so that the numerical simulation with the two-energy model is indispensable under the high heat flux conditions of over 1MW/m2.

Original languageEnglish
Title of host publicationProceedings of the ASME Summer Heat Transfer Conference, HT 2005
Pages409-419
Number of pages11
DOIs
Publication statusPublished - 2005 Dec 1
Event2005 ASME Summer Heat Transfer Conference, HT 2005 - San Francisco, CA, United States
Duration: 2005 Jul 172005 Jul 22

Publication series

NameProceedings of the ASME Summer Heat Transfer Conference
Volume2

Other

Other2005 ASME Summer Heat Transfer Conference, HT 2005
CountryUnited States
CitySan Francisco, CA
Period05/7/1705/7/22

ASJC Scopus subject areas

  • Engineering(all)

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