Droplet dynamics in a bifurcating channel

被引：98
|
作者：
Carlson, A. [1 ]
Do-Quang, M. [1 ]
Amberg, G. [1 ]
机构：
[1] Royal Inst Technol, Dept Mech, Linne Flow Ctr, S-11428 Stockholm, Sweden
来源：
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW | 2010年 / 36卷 / 05期
关键词：
Droplet dynamics; Cahn-Hilliard; Bifurcating channels; Wetting; Rayleigh-Plateau instability; Passive breakup; SIMULATIONS; SYSTEM; FLUID; FLOWS; MODEL;
D O I：
10.1016/j.ijmultiphaseflow.2010.01.002
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
In the present paper we present a phenomenological description of droplet dynamics in a bifurcating channel that is based on three-dimensional numerical experiments using the Phase Field theory. Droplet dynamics is investigated in a junction, which has symmetric outflow conditions in its daughter branches. We identify two different flow regimes as the droplets interact with the tip of the bifurcation, splitting and non-splitting. A distinct criterion for the flow regime transition is found based on the initial droplet volume and the Capillary (Ca) number. The Rayleigh Plateau instability is identified as a driving mechanism for the droplet breakup close to the threshold between the splitting and non-splitting regime. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：397 / 405
页数：9
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