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 .
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Numerical Investigation of Thermofluid Flow Characteristics With Phase Change Against High Heat Flux in Porous Media
Kazuhisa Yuki,
Kazuhisa Yuki
Department of Quantum Science and Energy Engineering, Graduate School of Engineering,
e-mail: kyuki@qse.tohoku.ac.jp
Tohoku University
, Sendai 980-8579, Japan
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Jun Abei,
Jun Abei
Department of Quantum Science and Energy Engineering, Graduate School of Engineering,
Tohoku University
, Sendai 980-8579, Japan
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Hidetoshi Hashizume,
Hidetoshi Hashizume
Department of Quantum Science and Energy Engineering, Graduate School of Engineering,
Tohoku University
, Sendai 980-8579, Japan
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Saburo Toda
Saburo Toda
Department of Quantum Science and Energy Engineering, Graduate School of Engineering,
Tohoku University
, Sendai 980-8579, Japan
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Kazuhisa Yuki
Department of Quantum Science and Energy Engineering, Graduate School of Engineering,
Tohoku University
, Sendai 980-8579, Japane-mail: kyuki@qse.tohoku.ac.jp
Jun Abei
Department of Quantum Science and Energy Engineering, Graduate School of Engineering,
Tohoku University
, Sendai 980-8579, Japan
Hidetoshi Hashizume
Department of Quantum Science and Energy Engineering, Graduate School of Engineering,
Tohoku University
, Sendai 980-8579, Japan
Saburo Toda
Department of Quantum Science and Energy Engineering, Graduate School of Engineering,
Tohoku University
, Sendai 980-8579, JapanJ. Heat Transfer. Jan 2008, 130(1): 012602 (12 pages)
Published Online: January 30, 2008
Article history
Received:
October 4, 2005
Revised:
May 3, 2007
Published:
January 30, 2008
Citation
Yuki, K., Abei, J., Hashizume, H., and Toda, S. (January 30, 2008). "Numerical Investigation of Thermofluid Flow Characteristics With Phase Change Against High Heat Flux in Porous Media." ASME. J. Heat Transfer. January 2008; 130(1): 012602. https://doi.org/10.1115/1.2780175
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