Bubble dynamics and interactions with a pair of micro pillars in tandem

被引：8

作者：

Elcock, D.

Honkanen, M. ^{[2
]}

Kuo, C. ^{[3
]}

Amitay, M.

Peles, Y. ^{[1
]}

机构：

[1] Rensselaer Polytech Inst, JEC 2049, Dept Mech Aerosp & Nucl Engn, Troy, NY 12180 USA

[2] Tampere Univ Technol, Dept Energy & Proc Engn, FIN-33720 Tampere, Finland

[3] Idaho Natl Lab, Idaho Falls, ID 83415 USA

来源：

INTERNATIONAL JOURNAL OF MULTIPHASE FLOW | 2011年 / 37卷 / 05期

基金：

美国国家科学基金会; 芬兰科学院;

关键词：

Bubbly flow; Micro channel; Adiabatic; Micro pillars bubble dynamics; Flow patterns; LIQUID 2-PHASE FLOW; BOILING HEAT-TRANSFER; SURFACE MICROCHANNELS; RECTANGULAR CHANNELS; SINGLE MICROCHANNEL; PRESSURE-DROP; PART I; DIAMETER; PREDICTION; PATTERNS;

D O I：

10.1016/j.ijmultiphaseflow.2010.12.004

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This study investigates flow patterns and bubble dynamics of two-phase flow around two 100 mu m diameter circular pillars in tandem, which were entrenched inside a horizontal micro channel. Bubble velocity, trajectory, size, and void fraction were measured using a high speed camera and analyzed using a particle tracking velocimetry method. A range of gas and liquid superficial velocities were tested, resulting in different bubbly flow patterns, which were consistent with previous studies. These flow patterns were altered as they interacted with the pillars. Depending on the relative transverse location of bubbles to the pillars, and through bubble-bubble interaction, the flow sometimes returned to its original state. It was also determined that the pillars altered both the bubble trajectory and void fraction, especially in the pillars region. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：440 / 452

页数：13

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