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Bubble Coalescence and Moving Contact Line Evaporation During Flow Boiling in a Single Minichannel

Freystein, M. and Stephan, Peter and Kirse, C. (2013):
Bubble Coalescence and Moving Contact Line Evaporation During Flow Boiling in a Single Minichannel.
In: ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels, [Online-Edition: http://dx.doi.org/10.1115/ICNMM2013-73043],
[Conference or Workshop Item]

Abstract

Cooling systems incorporating flow boiling in mini- and microchannels achieve very high thermal performance. In this study a comprehensive measurement technique is used for the investigation of flow boiling in a single rectangular minichannel. This technique allows the measurement of local surface heat flux and temperature with a very high spatial and temporal resolution in combination with a synchronized flow regime observation 1. This way, an insight into the basic phenomena is possible and will contribute to the fundamental understanding of the process. The experimental results show different phenomena such as an alternating area of high heat transfer between bubble front and end for elongated bubbles and the coalescence of bubbles in the flow. These observed phenomenon are comparable to experimental and numerical results of pool boiling.

Item Type: Conference or Workshop Item
Erschienen: 2013
Creators: Freystein, M. and Stephan, Peter and Kirse, C.
Title: Bubble Coalescence and Moving Contact Line Evaporation During Flow Boiling in a Single Minichannel
Language: English
Abstract:

Cooling systems incorporating flow boiling in mini- and microchannels achieve very high thermal performance. In this study a comprehensive measurement technique is used for the investigation of flow boiling in a single rectangular minichannel. This technique allows the measurement of local surface heat flux and temperature with a very high spatial and temporal resolution in combination with a synchronized flow regime observation 1. This way, an insight into the basic phenomena is possible and will contribute to the fundamental understanding of the process. The experimental results show different phenomena such as an alternating area of high heat transfer between bubble front and end for elongated bubbles and the coalescence of bubbles in the flow. These observed phenomenon are comparable to experimental and numerical results of pool boiling.

Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
Exzellenzinitiative
Exzellenzinitiative > Clusters of Excellence
Zentrale Einrichtungen
Exzellenzinitiative > Clusters of Excellence > Center of Smart Interfaces (CSI)
Event Title: ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels
Date Deposited: 17 Mar 2015 14:43
Official URL: http://dx.doi.org/10.1115/ICNMM2013-73043
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