Heat Transfer Research

ISSN for PRINT: 1064-2285

For Online Access

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2008, Volume39

Issue 5

94 pages

DOI: 10.1615/HeatTransRes.v39.i5

Issue price - $372.00

Leonid L. Vasiliev
Byelorussian Academy of Sciences; and Luikov Heat & Mass Transfer Institute, Porous Media Laboratory, P. Brovka Str. 15, 220072 Minsk, Belarus

A. S. Zhuravlyov
Luikov Heat & Mass Transfer Institute, National Academy of Sciences of Belarus, Porous Media Laboratory, P. Brovka Str. 15, 220072 Minsk, Belarus

A. Shapovalov
Luikov Heat & Mass Transfer Institute, Minsk, Belarus

A. Konon
A.V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15 P. Brovka Str., Minsk, 220072, Belarus

The results of experimental investigation of mini/micro-scale heat transfer of two-phase flow (propane) conducted at the heat flux range 102-105 W/m² are presented. Investigation of pool boiling and evaporation heat transfer in mini-channels on a single horizontal tube (smooth and with porous coating) was performed for the reasons of analysis of its cooling efficiency. The data obtained on a flooded and partially flooded horizontal tube with porous coating in liquid pool or in confined space (from 0.1 to 2 mm) testify the phenomena of micro-heat pipe inside a porous structure. A micro-scale effect took place inside the porous body and a mini-scale effect was ensured due to a flank or annular mini-channel. Visual analysis and experimental results show that such combination is favorable for enhancement of evaporation and two-phase convection heat transfer. The availability of annular mini-channel significantly promotes to intense heat transfer (up to 2.5−3 times as high) at heat fluxes up to 50 kW/m² , as compared with the process in liquid pool.

DOI: 10.1615/HeatTransRes.v39.i5.30 Download article, 391-401 pages

Article price - $45.00

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