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
Country/TerritoryUnited States
CitySan Francisco, CA
Period05/7/1705/7/22

ASJC Scopus subject areas

  • Engineering(all)

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