Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2011-08-01

Journal: INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW

Included Journals: EI、SCIE、Scopus

Volume: 32

Issue: 4

Page Number: 796-804

ISSN: 0142-727X

Key Words: Annular flow; Numerical simulation; CFD; Entrainment; Deposition; Film flow

Abstract: In this paper, a new two-fluid two-component computational fluid dynamics (CFD) model is developed to simulate vertical upward two-phase annular flow. The two-phase VOF scheme is utilized to model the roll wave flow, and the gas core is described by a two-component phase consisting of liquid droplets and gas phase. The entrainment and deposition processes are taken into account by source terms of the governing equations. Unlike the previous models, the newly developed model includes the effect of liquid roll waves directly determined from the CFD code, which is able to provide more detailed and, the most important, more self-standing information for both the gas core flow and the film flow as well as their interactions. Predicted results are compared with experimental data, and a good agreement is achieved. (C) 2011 Elsevier Inc. All rights reserved.