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Flow Boiling in Expanding Microchannels

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This Brief presents an up to date summary of details of the flow boiling heat transfer, pressure drop and instability characterist... Weiterlesen
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Beschreibung

This Brief presents an up to date summary of details of the flow boiling heat transfer, pressure drop and instability characteristics; two phase flow patterns of expanding microchannels. Results obtained from the different expanding microscale geometries are presented for comparison and addition to that, comparison with literatures is also performed. Finally, parametric studies are performed and presented in the brief. The findings from this study could help in understanding the complex microscale flow boiling behavior and aid in the design and implementation of reliable compact heat sinks for practical applications.



Poh-Seng Lee is Associate professor in the Department of Mechanical Engineering, at the National University of Singapore, Singapore.

Tamanna Alam is a Post-doctoral research fellow in the Department of Mechanical Engineering, University of South Carolina, SC, USA.



Autorentext

Poh-Seng Lee is Associate professor in the Department of Mechanical Engineering, at the National University of Singapore, Singapore.

Tamanna Alam is a Post-doctoral research fellow in the Department of Mechanical Engineering, University of South Carolina, SC, USA.



Inhalt
Chapter 1: Introduction
1.1Background
1.2Objectives
      References
Chapter 2: Flow Boiling Heat Transfer and Pressure Drop Characteristics in Expanding Microgap Channel
2.1Experimental Setup and Procedure<
2.2Bubble characteristics in flow boiling expanding microgap heat sink
2.3Comparison of pressure drop between expanding microgap heat sinks
2.4Comparison of boiling curves between expanding microgap heat sinks
2.5Comparison of local flow boiling heat transfer coefficient between expanding microgap heat sinks
2.6Comparison of microgap heat transfer coefficient data with literature
2.7Comparison of wall temperature uniformity between expanding microgap heat sinks
2.8Conclusions
     References
Chapter 3: Flow Boiling Instabilities in Expanding Microgap Channel
3.1Mass flux effects on flow boiling instabilities in expanding microgap channel
3.2Heat flux effects on flow boiling instabilities in expanding microgap channel
3.3Microgap size effects on flow boiling instabilities in expanding microgap channel
3.4Conclusions
     References
Chapter 4: Flow Boiling Heat Transfer, Pressure Drop and Instabilities in Straight and Expanding (Sloping Fin) Microchannels - A Comparative Study
4.1Experimental Setup and Procedure
4.2Flow boiling regimes and bubble dynamics in straight and sloping fin microchannels
4.3Comparison of boiling curves between straight and sloping fin microchannels
4.4Comparison of heat transfer coefficients between straight and sloping fin microchannels
4.5Comparison of pressure drops between straight and sloping fin microchannels
4.6Comparison of instabilities between straight and sloping fin microchannels
4.7Conclusions
     References
Chapter 5: Flow Boiling Performance in Scaled Up Expanding Channel Geometries: Stepped Fin Minichannels
5.1 Experimental Setup and Procedure
5.2 Comparison of boiling curves between straight and stepped fin minichannels
5.3 Comparison of heat transfer coefficients between straight and stepped fin minichannels
5.4 Comparison of pressure drops between straight and stepped fin minichannels
5.5 Comparison of wall temperature uniformity between straight and stepped fin minichannels
5.6 Conclusions
     References
Chapter 6: Closure
Appendix A: Uncertainty Analysis
Appendix B: Data Reduction

Produktinformationen

Titel: Flow Boiling in Expanding Microchannels
Autor:
EAN: 9783319550329
ISBN: 978-3-319-55032-9
Digitaler Kopierschutz: Wasserzeichen
Format: E-Book (pdf)
Herausgeber: Springer-Verlag GmbH
Genre: Technik
Anzahl Seiten: 82
Veröffentlichung: 24.05.2017
Jahr: 2017
Auflage: 1st ed. 2017
Untertitel: Englisch
Dateigrösse: 5.9 MB

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