Journal of Enhanced Heat Transfer Theory and Application in High Performance Heat and Mass Transfer

ISSN for PRINT: 1065-5131

For Online Access

Best Paper Award Selection - Editorial Board Site

2004, Volume11

Issue 4

232 pages

DOI: 10.1615/JEnhHeatTransf.v11.i4

Issue price - $138.00

Y. H. Zhao
Institute of Engineering Thermophysics, Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, P.R. China

X. G. Hu
Institute of Engineering Thermophysics, Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, P.R. China

T. Tsuruta
Department of Mechanical Engineering, Kyushu Institute of Technology, Kitakyushu, Japan

K. Yamamoto
Department of Mechanical Engineering, Kyushu Institute of Technology, Kitakyushu, Japan

In the present paper, an experimental investigation about the phase-change heat transfer is performed on a vertical plate with rectangular micro-capillary grooves. The heat transfer is much enhanced compared to the pool nucleate boiling on a smooth surface. Boiling occurs, and vapor bubbles grow rapidly and rapture in the microgrooves as the wall heat flux is higher, while the heat transfer on the groove surface is a pure evaporation process at lower superheat. For smaller height surface, the mechanism of critical heat flux (CHF) is the same as that in usual pool boiling, but liquid supply limitation is essential to the maximum mean wall heat flux for larger height surface. The CHF is independent of the gravity. Furthermore, the experiment verified that the evaporative heat transfer only on the stable contact line (or meniscus) is small and incomparable to the value of CHF in usual pool boiling.

DOI: 10.1615/JEnhHeatTransf.v11.i4.90 Download article, 315-324 pages

Article price - $35.00

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