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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detector
Year: 2009  |  Volume: 605  |  Issue: 1  |  Page No.: 192 - 196

Shape measurement of bubble in a liquid metal

Y. Saito, X. Shen, K. Mishima and M. Matsubayashi    

Abstract:

Dynamic behavior of a two-phase bubble, i.e. a steam bubble containing a droplet evaporating in the bubble, in the molten alloy was clearly visualized using high-frame-rate neutron radiography. In relation to some direct contact heat exchanger design with molten lead–bismuth (Pb–Bi), experiments have been done at JRR-3M of JAEA (Japan Atomic Energy Agency) with water droplets evaporating in a stable thermally stratified Newton's alloy pool. The instantaneous shape and size of the bubble has been iteratively estimated from the void fraction distributions and total void volume by assuming a symmetrical bubble shape.

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