The Proceedings of the Thermal Engineering Conference
Online ISSN : 2424-290X
2016
Session ID : C221
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Effects of bubble lift-off conditions on numerical analysis of subcooled flow boiling
Shintaro SakamotoKazuhiro KaihoKoji EnokiTomio Okawa
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CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

Numerical simulation of subcooled flow boiling in a vertical rectangular duct was carried out using a one-way bubble tracking method; this method treats each bubble as an individual particle. Although a bubble behavior after lifting off the heated surface depends on the bubble size and velocity at lift-off, these lift-off conditions are not taken into consideration in existing subcooled flow boiling models. In the present simulation, the distributions of lift-off velocity and bubble size were considered. It was demonstrated that the calculated void fraction in subcooled flow boiling is influenced significantly by the lift-off conditions.

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© 2016 The Japan Society of Mechanical Engineers
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