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Nucleate Pool Boiling on Tubes With Subsurface Mini and Micro Channels

Stephan, Peter and Wondra, F. (2008):
Nucleate Pool Boiling on Tubes With Subsurface Mini and Micro Channels.
In: ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels, [Online-Edition: http://dx.doi.org/10.1115/ICNMM2008-62041],
[Conference or Workshop Item]

Abstract

Tubes with subsurface mini- and micro channels are widely used in boiling devices. Today, the design of these tubes is based on empirical investigations because reliable theoretical or numerical design methods are not available, and the heat transfer performance characteristics vary strongly e.g. for different fluids, system pressures and heat fluxes. The presented study approaches the subject of interest from 3 different paths: (i) macroscopic heat transfer performance measurements; (ii) optical measurements of the thermal and hydrodynamic phenomena inside the subsurface channels with very high spatial and temporal resolution; (iii) development of a computational model. While path (i) is a standard procedure in the scientific community, path (ii) is a completely new approach, and only the combination of (i) and (ii) is a solid basis for the physically based model development in path (iii). Tubes with different subsurface channels and micro pin-fins are used in combination with different fluids at different system pressures. The results are presented and discussed.

Item Type: Conference or Workshop Item
Erschienen: 2008
Creators: Stephan, Peter and Wondra, F.
Title: Nucleate Pool Boiling on Tubes With Subsurface Mini and Micro Channels
Language: German
Abstract:

Tubes with subsurface mini- and micro channels are widely used in boiling devices. Today, the design of these tubes is based on empirical investigations because reliable theoretical or numerical design methods are not available, and the heat transfer performance characteristics vary strongly e.g. for different fluids, system pressures and heat fluxes. The presented study approaches the subject of interest from 3 different paths: (i) macroscopic heat transfer performance measurements; (ii) optical measurements of the thermal and hydrodynamic phenomena inside the subsurface channels with very high spatial and temporal resolution; (iii) development of a computational model. While path (i) is a standard procedure in the scientific community, path (ii) is a completely new approach, and only the combination of (i) and (ii) is a solid basis for the physically based model development in path (iii). Tubes with different subsurface channels and micro pin-fins are used in combination with different fluids at different system pressures. The results are presented and discussed.

Divisions: 16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
Exzellenzinitiative > Clusters of Excellence > Center of Smart Interfaces (CSI)
16 Department of Mechanical Engineering
Zentrale Einrichtungen
Exzellenzinitiative
Exzellenzinitiative > Clusters of Excellence
Event Title: ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels
Date Deposited: 17 Mar 2015 15:04
Official URL: http://dx.doi.org/10.1115/ICNMM2008-62041
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