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Indexed by:期刊论文

Date of Publication:2013-12-01

Journal:INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW

Included Journals:SCIE、EI、Scopus

Volume:44

Page Number:120-129

ISSN No.:0142-727X

Key Words:Lattice Boltzmann method; Flow boiling; Phase change; Bubble departure diameter; Bubble release frequency

Abstract:Nucleate boiling flows on a horizontal plate are studied in this paper by a hybrid lattice Boltzmann method, where both quiescent and slowly flowing ambient are concerned. The process of a single bubble growth on and departure from the superheated wall is simulated. The simulation result supports the transient micro-convection model. The bubble departure diameter and the release frequency are investigated from the simulation result. It is found that the bubble departure diameter and the release frequency are proportional to g(-0.425) and g(0.678) in quiescent fluid, respectively, where g is the gravitational acceleration. Nucleate boiling in slowly flowing ambient is also calculated in consideration of forced convection. It is presented that the bubble departure diameter and the release frequency have exponential relationship and linear relationship with inlet velocity in slowly flowing fluid, respectively. (C) 2013 Elsevier Inc. All rights reserved.