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Solid/liquid phase change heat transfer in porous media. Effect of density inversion of water on melting process in a rectangular region; Takoshitsu sonai no ko-ekiso henka. Mizu no mitsudo gyakuten ga kukei ryoiki no yukai katei ni oyobosu eikyo

Journal Article:

Abstract

Solid/liquid phase change in porous media has a wide relation with freezing and melting of ground bed, storage of cold heat in soil, and underground heat exchangers. This paper describes an investigation on the effect of density inversion on melting of ice in porous media by using the previously reported numerical analysis method. The high-temperature side temperature and the Darcy number were varied and investigated systematically on the ice in a porous media sealed in a rectangular container of which right hand side is maintained at elevated temperatures and the other three sides are insulated of heat. As a result, a large number of findings were obtained including the following matters: when the Darcy number is fixed at 4.01 {times} 10{sup {minus}5} and the high-temperature side temperature, Tw, is varied, the fluid descends along the high-temperature side because of the density inversion at Tw=4{degree}C, and forms one weak circulation that rotates clockwise; however, when the temperature reaches 16{degree}C, the circulation disappears, and a circulation rotating counterclockwise is observed, becoming identical to the case of a fluid where there is no density inversion; and change in the Nusselt number against the melting ratio, R, is the smallest at Tw=8{degree}C, and decreases  More>>
Authors:
Sasaguchi, K [1] 
  1. Kumamoto University, Kumamoto (Japan). Faculty of Engineering
Publication Date:
Dec 25, 1994
Product Type:
Journal Article
Reference Number:
SCA: 360602; 540250; 360606; PA: NEDO-95:910186; EDB-95:084786; SN: 95001397825
Resource Relation:
Journal Name: Nippon Kikai Gakkai Ronbunshu. B Hen (Transactions of the Japan Society of Mechanical Engineers. Part B); Journal Volume: 60; Journal Issue: 580; Other Information: PBD: 25 Dec 1994
Subject:
36 MATERIALS SCIENCE; 54 ENVIRONMENTAL SCIENCES; LAYERS; POROUS MATERIALS; CAVITIES; RECTANGULAR CONFIGURATION; SOILS; SOIL MECHANICS; ICE; PHASE TRANSFORMATIONS; SOLIDS; LIQUIDS; DENSITY; TEMPERATURE DEPENDENCE; THAWING; FREEZING; COLD STORAGE; UNDERGROUND; HEAT EXCHANGERS; DARCY LAW; HYDRAULIC CONDUCTIVITY; CONVECTION; NUSSELT NUMBER
OSTI ID:
58924
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: NKGBDD; ISSN 0387-5016; TRN: 95:910186
Submitting Site:
NEDO
Size:
pp. 160-166
Announcement Date:

Journal Article:

Citation Formats

Sasaguchi, K. Solid/liquid phase change heat transfer in porous media. Effect of density inversion of water on melting process in a rectangular region; Takoshitsu sonai no ko-ekiso henka. Mizu no mitsudo gyakuten ga kukei ryoiki no yukai katei ni oyobosu eikyo. Japan: N. p., 1994. Web.
Sasaguchi, K. Solid/liquid phase change heat transfer in porous media. Effect of density inversion of water on melting process in a rectangular region; Takoshitsu sonai no ko-ekiso henka. Mizu no mitsudo gyakuten ga kukei ryoiki no yukai katei ni oyobosu eikyo. Japan.
Sasaguchi, K. 1994. "Solid/liquid phase change heat transfer in porous media. Effect of density inversion of water on melting process in a rectangular region; Takoshitsu sonai no ko-ekiso henka. Mizu no mitsudo gyakuten ga kukei ryoiki no yukai katei ni oyobosu eikyo." Japan.
@misc{etde_58924,
title = {Solid/liquid phase change heat transfer in porous media. Effect of density inversion of water on melting process in a rectangular region; Takoshitsu sonai no ko-ekiso henka. Mizu no mitsudo gyakuten ga kukei ryoiki no yukai katei ni oyobosu eikyo}
author = {Sasaguchi, K}
abstractNote = {Solid/liquid phase change in porous media has a wide relation with freezing and melting of ground bed, storage of cold heat in soil, and underground heat exchangers. This paper describes an investigation on the effect of density inversion on melting of ice in porous media by using the previously reported numerical analysis method. The high-temperature side temperature and the Darcy number were varied and investigated systematically on the ice in a porous media sealed in a rectangular container of which right hand side is maintained at elevated temperatures and the other three sides are insulated of heat. As a result, a large number of findings were obtained including the following matters: when the Darcy number is fixed at 4.01 {times} 10{sup {minus}5} and the high-temperature side temperature, Tw, is varied, the fluid descends along the high-temperature side because of the density inversion at Tw=4{degree}C, and forms one weak circulation that rotates clockwise; however, when the temperature reaches 16{degree}C, the circulation disappears, and a circulation rotating counterclockwise is observed, becoming identical to the case of a fluid where there is no density inversion; and change in the Nusselt number against the melting ratio, R, is the smallest at Tw=8{degree}C, and decreases monotonously with the R. 15 refs., 12 figs.}
journal = {Nippon Kikai Gakkai Ronbunshu. B Hen (Transactions of the Japan Society of Mechanical Engineers. Part B)}
issue = {580}
volume = {60}
journal type = {AC}
place = {Japan}
year = {1994}
month = {Dec}
}