0
Research Papers: Porous Media

Numerical Investigation of Thermofluid Flow Characteristics With Phase Change Against High Heat Flux in Porous Media

[+] Author and Article Information
Kazuhisa Yuki

Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japankyuki@qse.tohoku.ac.jp

Jun Abei, Hidetoshi Hashizume, Saburo Toda

Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan

J. Heat Transfer 130(1), 012602 (Jan 30, 2008) (12 pages) doi:10.1115/1.2780175 History: Received October 04, 2005; Revised May 03, 2007; Published January 30, 2008

This study numerically evaluates thermofluid flow characteristics in porous medium by a newly developed “modified two-phase mixture model” applying Ergun’s law and a two-energy model instead of a 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 imposed heat conducts from a heating wall and further convective heat transfer is more active. The degree of thermal nonequilibrium has a positive correlation with the increase in flow velocity and heat flux input. In the 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 modified two-phase mixture model is indispensable under the high heat flux conditions of over 1MWm2.

FIGURES IN THIS ARTICLE
<>
Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Heat removal system by EVAPORON

Grahic Jump Location
Figure 2

Computational domain

Grahic Jump Location
Figure 3

Influence of flow velocity on thermofluid flow characteristics (single-phase flow)

Grahic Jump Location
Figure 4

Radial distribution of heat-transfer coefficient

Grahic Jump Location
Figure 5

Influence of heat flux on thermofluid flow characteristics (single-phase flow)

Grahic Jump Location
Figure 6

Radial distribution of heat-transfer coefficient

Grahic Jump Location
Figure 7

Influence of flow velocity on thermofluid flow characteristics (two-phase flow)

Grahic Jump Location
Figure 8

Influence of flow velocity on liquid saturation distribution

Grahic Jump Location
Figure 9

Temperature distributions of solid phase and fluid phase at central axis and heating wall

Grahic Jump Location
Figure 10

Radial distribution of heat-transfer coefficient

Grahic Jump Location
Figure 11

Influence of heat flux on thermofluid flow characteristics (two-phase flow)

Grahic Jump Location
Figure 12

Influence of heat flux on liquid saturation distribution

Grahic Jump Location
Figure 13

Temperature distributions of solid phase and fluid phase at central axis and heating wall

Grahic Jump Location
Figure 14

Radial distribution of heat-transfer coefficient

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In