Boiling and Evaporation in Small Diameter Channels

By A. Bergles, J. Lienhard V, G. Kendall, P. Griffith. 2003

198 citations recorded by the source corpus.

Since the 1950s, the research and industrial communities have developed a body of experimental data and set of analytical tools and correlations for two-phase flow and heat transfer in passages having a hydraulic diameter greater than about 6 mm. These tools include flow regime maps, pressure drop and heat transfer correlations, and critical heat flux limits, as well as strategies for robust thermal management of HVAC systems, electronics, and nuclear power plants. Designers of small systems with thermal management by phase change will need analogous tools to predict and optimize thermal behavior in the mesoscale and smaller sizes. Such systems include a wide range of devices for computation, measurement, and actuation in environments that range from office space to outer space as well as living systems. This paper examines important processes that must be considered when channel diameters decrease, including flow distribution issues in single, parallel, and split flows; flow instability in parallel passages; manufacturing tolerance effects; single-phase heat transfer; nucleation processes; boiling heat transfer and pressure drop; and wall conductance effects. The discussion focuses on engineering issues for the design of practical systems.

Subfields: Computational Mechanics, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/45db1584e650f8393850008d9bb9cfe806451a51

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In Computational Mechanics

In Mechanical Engineering

Citations in the corpus

Two-phase flow instabilities: A review (2014, background): “[71] flashing could also play an important role in micro-channels as a cause of the large frictional pressure drop.”
Numerical study of bubble growth and wall heat transfer during flow boiling in a microchannel (2011, background): “[1], Garimella and Sobhan [2] and Thome [3].”
Microchannel size effects on local flow boiling heat transfer to a dielectric fluid (2008, methodology): “[17] also performed an analysis and showed that incipience of boiling in a subcooled flow was most likely governed by the nucleation sites in the walls and not by the channel size.”
Analysis and active control of pressure-drop flow instabilities in boiling microchannel systems (2010, background): “[10], pressure-drop oscillations, one of the well-known dynamic flow instabilities, occur in systems when two conditions are satisfied: there must be a upstream compressible volume of the boiling channel, and the channel pressure drop decreases with increasing mass flowrate in the negative-slope flo”
History, Advances, and Challenges in Liquid Flow and Flow Boiling Heat Transfer in Microchannels: A Critical Review (2012, background): “[8–11]).”
Prediction of the onset of nucleate boiling in microchannel flow (2005, background): “In spite of these attributes, the complex nature of convective flow boiling in microchannel heat sinks is still not well-understood, hindering their application in industry practice [1, 2, 3, 4].”
Saturated flow boiling heat transfer and pressure drop in silicon microchannel arrays (2008, background): “In spite of these appealing attributes, the complex nature of convective boiling and two-phase flow in microchannels is still not well understood and this has impeded their wide implementation in practical applications [1–4].”
Effects of inlet/outlet configurations on flow boiling instability in parallel microchannels (2008, methodology): “This type of connection was suggested by Bergles [16] and Bergles and Kandlikar [17], which was used by Kandlikar et al.”