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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

HEAT TRANSFER IN POROUS MEDIA CONSIDERING PHASE CHANGE, CAPILLARITY AND GRAVITY. APPLICATION TO CAPILLARY EVAPORATOR

Get access (open in a dialog) DOI: 10.1615/IHTC11.4000
pages 393-398

Résumé

A theoretical and numerical investigation of heat and mass transfer within the evaporator of a capillary pump loop (CPL) is presented. The theoretical study is based on a one-dimensional simplified approach. This approach enables us to explore the influence of various factors controlling the performance of the system.
Then, we present results of a two-dimensional pore network study. In this approach, the pore space is modeled by a network composed of pores and throats of various size randomly distributed. The solid phase is also represented as a network connected to the pore-space network. This solid dual network is necessary to account for the thermal conductive transport in the solid phase. The network approach turns out to be particularly useful for studying the influence of the pore size distribution. In particular, we show the occurrence of capillary fingering. A solution for limiting this capillary effect is proposed.