Confined bubble growth during flow boiling in a mini/micro-channel of rectangular cross-section Part I: Experiments and 1-D modelling

被引：56

作者：

Gedupudi, S. ^{[1
]}

Zu, Y. Q. ^{[2
]}

Karayiannis, T. G. ^{[1
]}

Kenning, D. B. R. ^{[1
]}

Yan, Y. Y. ^{[2
]}

机构：

[1] Brunel Univ, Sch Engn & Design, London UB8 3PH, England

[2] Univ Nottingham, Sch Built Environm, Nottingham NG7 2RD, England

来源：

INTERNATIONAL JOURNAL OF THERMAL SCIENCES | 2011年 / 50卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

Confined bubble growth; Flow boiling; Microchannel; Pressure fluctuation; HEAT-TRANSFER; PRESSURE-DROP; MICROCHANNELS; PREDICTION; DIAMETER; SIZE; TUBE;

D O I：

10.1016/j.ijthermalsci.2010.09.001

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Heat sinks using evaporation in arrays of parallel microchannels have potential for the removal of high heat fluxes from small areas. They suffer from flow instabilities and uneven distribution between channels that may cause local dryout and overheating. The current state of the art is reviewed critically. A simple 1-D model for bubble growth in a single channel with a compressible volume in its upstream plenum is developed as a tool for the rational design of measures known to reduce flow instabilities, namely inlet resistance and enhanced nucleation in every channel. The model considers two stages of partially and fully confined bubble growth in a single channel of rectangular cross-section, suggested by experimental observations, followed by venting of vapour to the downstream plenum. The experiments also show the influence of apparently minor changes in rig design and operation on upstream compressibility and flow reversal. The model considers upstream compressibility due to subcooled boiling in a preheater or trapped non-condensable gas and the reduction of flow reversal by inlet resistance. The feasibility of measuring transient axial variations in pressure within small channels using inexpensive transducers is demonstrated. (C) 2010 Elsevier Masson SAS. All rights reserved.

引用

页码：250 / 266

页数：17

共 5 条

[1] Confined bubble growth during flow boiling in a mini-/micro-channel of rectangular cross-section part II: Approximate 3-D numerical simulation
Zu, Y. Q.
Yan, Y. Y.
Gedupudi, S.
Karayiannis, T. G.
Kenning, D. B. R.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2011, 50 (03) : 267 - 273
[2] Modeling of pressure drop and heat transfer for flow boiling in a mini/micro-channel of rectangular cross-section
Jain, Shashwat
Jayaramu, Prasanna
Gedupudi, Sateesh
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2019, 140 : 1029 - 1054
[3] On the Prediction of Pressure Fluctuations and Pressure Drop Caused by Confined Bubble Growth During Flow Boiling in a Rectangular Mini/Micro-Channel
Jain, Shashwat
Gedupudi, Sateesh
HEAT TRANSFER ENGINEERING, 2020, 41 (21) : 1763 - 1783
[4] 1-D MODELLING AND 3-D SIMULATION OF CONFINED BUBBLE FORMATION AND PRESSURE FLUCTUATIONS DURING FLOW BOILING IN A MICROCHANNEL WITH A RECTANGULAR CROSS-SECTION OF HIGH ASPECT RATIO
Gedupudi, S.
Zu, Y. Q.
Karayiannis, T. G.
Kenning, D. B. R.
Yan, Y. Y.
ICNMM 2009, PTS A-B, 2009, : 1087 - 1094
[5] NUMERICAL SIMULATION AND EXPERIMENTAL OBSERVATIONS OF CONFINED BUBBLE GROWTH DURING FLOW BOILING IN A MICROCHANNEL WITH RECTANGULAR CROSS-SECTION OF HIGH ASPECT RATIO
Zu, Y. Q.
Gedupudi, S.
Yan, Y. Y.
Karayiannis, T. G.
Kenning, D. B. R.
ICNMM 2009, PTS A-B, 2009, : 1077 - 1085

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