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International Heat Transfer Conference 5

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

NATURAL CONVECTION AND EVAPORATION FROM A FREE SURFACE OF LIQUID SODIUM

Ryoji Ishiguro
Department of Nuclea Engineering, Hokkaido University Sapporo 060, Japan

Toshiaki Kumada
Hokkaido University, Sapporo, Japan

Toshio Abe
Hokkaido University, Sapporo, Japan

Abstract

The free surface of the liquid sodium is a narrow rectangle surrounded by a large isothermal plate on the same level, temperature of which is fairly lower than the sodium. Numerical calculations of the convection are performed for the range of Rayleigh number up to 1.6×105 The temperature fields are observed by an interferometer. The evaporation rates are measured. The analogy between Nusselt and Sherwood number is valid for a small difference of the temperature between the free surface and the surroundings. Otherwise, the sodium fog is formed in the cover gas and Sherwood number becomes larger.

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