A study on large bubble motion and liquid film in vertical pipes and inclined narrow channels

被引：23

作者：

Behafarid, F. ^{[1
]}

Jansen, K. E. ^{[2
]}

Podowski, M. Z. ^{[1
]}

机构：

[1] Rensselaer Polytech Inst, Troy, NY 12180 USA

[2] Univ Colorado, Boulder, CO 80309 USA

来源：

INTERNATIONAL JOURNAL OF MULTIPHASE FLOW | 2015年 / 75卷

关键词：

Two-phase flow; Level set method; DNS; Liquid microfilm; Taylor bubbles; Narrow channels; INCOMPRESSIBLE 2-PHASE FLOWS; NAVIER-STOKES EQUATIONS; FINITE-ELEMENT METHODS; LEVEL SET METHOD; SURFACE-TENSION; CONTACT-ANGLE; LONG BUBBLES; SLUG FLOW; SIMULATION; TUBES;

D O I：

10.1016/j.ijmultiphaseflow.2015.04.016

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The objective of this paper is to discuss the results of a combined physical and computational analysis of the dynamics of large deformable bubbles in conduits of different geometries and orientations. The situations analyzed included a vertical circular pipe and a narrow rectangular channel of different inclination angles. Three-dimensional simulations were performed at a DNS-scale using the PHASTA code combined with the level set method for interface tracking. The results of computer simulations for Taylor bubble flow in a vertical pipe have been verified against a simplified theoretical model and validated against available general evidence deduced from various experimental studies. The predictions for bubbles flowing along inclined rectangular channels have been validated against experimental data. Several modeling and numerical issues have been investigated, including the effect of a liquid microfilm between the bubble and the wall above it, and the impact of the blending region arising from the level-set model formulation on the accuracy of results. (C) 2015 Published by Elsevier Ltd.

引用

页码：288 / 299

页数：12

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