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RESEARCH PAPERS

Numerical Study of an Evaporating Meniscus on a Moving Heated Surface

[+] Author and Article Information
Abhijit Mukherjee1

Thermal Analysis and Microfluidics Laboratory, Department of Mechanical Engineering, Rochester Institute of Technology, Rochester, NY 14623mukherje@mtu.edu

Satish G. Kandlikar

Thermal Analysis and Microfluidics Laboratory, Department of Mechanical Engineering, Rochester Institute of Technology, Rochester, NY 14623

1

Corresponding author.

J. Heat Transfer 128(12), 1285-1292 (Aug 03, 2006) (8 pages) doi:10.1115/1.2397093 History: Received August 31, 2005; Revised August 03, 2006

The present study is performed to numerically analyze an evaporating meniscus bounded between the advancing and receding interfaces on a moving heated surface. The numerical scheme developed for analyzing interface motion during bubble growth in pool boiling has been applied. A column of liquid is placed between a nozzle outlet and a moving wall, and calculations are done in two dimensions with a fixed distance between the nozzle and the wall. The results show that the wall velocity creates a circulation near the meniscus base, resulting in transient heat conduction. The local wall heat transfer is found to vary significantly along the meniscus base, the highest being near the advancing contact line. The heat transfer coefficient is found to depend on the advancing contact angle and wall velocity but is independent of the wall superheat. Reasonable agreement is observed when the meniscus profile and heat transfer results obtained from the numerical simulation are compared to the experimental data.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 1

Details of a stationary evaporating meniscus region

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Figure 2

Similarity between a nucleating bubble and a moving evaporating meniscus in the contact line region

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Figure 3

Computational domain

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Figure 4

Variation of meniscus base length with time and grid independence check (ACA—61; RCA—48; SH—5K; WV—0.1m∕s)

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Figure 5

Time-step independence check (ACA—61; RCA—48; SH—5K; WV—0.1m∕s)

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Figure 6

Liquid circulation inside meniscus (ACA—61; RCA—48; SH—5K; WV—0.1m∕s)

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Figure 7

Temperature field inside meniscus (ACA—61; RCA—48; SH—5K; WV—0.1m∕s)

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Figure 8

Variation of heat transfer coefficient along the meniscus base (ACA—61; RCA—48; SH—5K; WV—0.1m∕s)

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Figure 9

Comparison of moving meniscus shapes: (a) Experiment and (b) numerical simulation

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Figure 10

Comparison of average heat transfer coefficient at the meniscus base as a function of contact angle (SH—5K; WV—0.1m∕s)

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Figure 11

Comparison of average heat transfer coefficient at the meniscus base as a function of wall superheat (ACA—61; RCA—48; WV—0.1m∕s)

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Figure 12

Comparison of average heat transfer coefficient at the meniscus base as a function of wall velocity (ACA—61; RCA—48; SH—5K)

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