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Research Papers: Evaporation, Boiling, and Condensation

Numerical Simulations of the Dynamics and Heat Transfer Associated With a Single Bubble in Subcooled Pool Boiling

[+] Author and Article Information
Jinfeng Wu

Department of Mechanical and Aerospace Engineering, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles, Los Angeles, CA 90095

Vijay K. Dhir1

Department of Mechanical and Aerospace Engineering, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles, Los Angeles, CA 90095vdhir@seas.ucla.edu

1

Corresponding author.

J. Heat Transfer 132(11), 111501 (Aug 10, 2010) (15 pages) doi:10.1115/1.4002093 History: Received June 16, 2009; Revised June 21, 2010; Published August 10, 2010; Online August 10, 2010

In this study, numerical simulations of a vapor bubble in subcooled pool boiling have been performed. The applied numerical procedure coupling level-set function with moving mesh method has been validated by comparing the results of bubble-growth history including bubble departure diameter with data from experiments. The predictions of bubble dynamics and heat transfer for various subcoolings as well as different gravity levels are presented.

Copyright © 2010 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Macro- and microregions in numerical simulation

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Figure 2

(a) Growth rate. (b) Nu versus time for wall superheat=7°C, liquid subcooling=1.5°C, contact angle=54 deg, pressure=1.013×105 Pa, and g/ge=1.

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Figure 3

Flow field and temperature distribution for wall superheat=7°C, liquid subcooling=1.5°C, contact angle=54 deg, pressure=1.013×105 Pa, and g/ge=1

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Figure 4

Growth rate for wall superheat=6.5°C, liquid subcooling=4°C, contact angle=54 deg, pressure=1.013×105 Pa, and g/ge=1

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Figure 5

Growth history for wall superheat=2.5°C, liquid subcooling=0.4°C, contact angle=54 deg, pressure=1.013×105 Pa, g/ge=0.045, and water as test fluid

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Figure 6

Comparison of departure diameter of R-12 versus pressure for g/ge=0.01, contact angle=25 deg, wall superheat=8°C, and liquid subcooling=0°C

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Figure 7

(a) Growth rate. (b) Nu versus time for wall superheat=8°C, contact angle=38 deg, pressure=1.013×105 Pa, and g/ge=1

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Figure 8

Total heat transfer rate through the interface and microlayer for of wall superheat=8°C, contact angle=38 deg, pressure=1.013×105 Pa, and g/ge=1

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Figure 9

Heat flux as a function of location along bubble interface for wall superheat=8°C, contact angle=38 deg, pressure=1.013×105 Pa, and g/ge=1

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Figure 10

Temperature distribution and velocity field for wall superheat=8°C, liquid subcooling=0°C, contact angle=38 deg, pressure=1.013×105 Pa, and g/ge=1 (temperature increment between isotherms is 1.58°C)

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Figure 11

Temperature distribution and velocity field for wall superheat=8°C, liquid subcooling=1°C, contact angle=38 deg, pressure=1.013×105 Pa, and g/ge=1 (temperature increment between isotherms is 1.78°C)

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Figure 12

Temperature distribution and velocity field for wall superheat=8°C, liquid subcooling=5°C, contact angle=38 deg, pressure=1.013×105 Pa, and g/ge=1 (temperature increment between isotherms is 2.57°C)

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Figure 13

Evolving grid distribution

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Figure 14

(a) Growth rate. (b) Nu versus time for wall superheat=8°C, contact angle=38°, pressure=1.013×105 Pa, and g/ge=0.01

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Figure 15

Total heat transfer rate through the interface and microlayer for wall superheat=8°C, contact angle=38 deg, pressure=1.013×105 Pa, and g/ge=0.01

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Figure 16

Heat flux as a function of location along bubble interface for wall superheat=8°C, liquid subcooling=0°C, contact angle=38 deg, pressure=1.013×105 Pa, and g/ge=0.01

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Figure 17

Temperature distribution and velocity field for wall superheat=8°C, liquid subcooling=0°C, contact angle=38 deg, pressure=1.013×105 Pa, and g/ge=0.01 (temperature increment between isotherms is 1.58°C)

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Figure 18

Temperature distribution and velocity field for wall superheat=8°C, liquid subcooling=1°C, contact angle=38 deg, pressure=1.013×105 Pa, and g/ge=0.01 (temperature increment between isotherms is 1.78°C)

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Figure 19

Temperature distribution and velocity field for wall superheat=8°C, liquid subcooling=5°C, contact angle=38 deg, pressure=1.013×105 Pa, and g/ge=0.01 (temperature increment between isotherms is 2.57°C)

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Figure 20

Growth rate for wall superheat=8°C, contact angle=38 deg, pressure=1.013×105 Pa, and g/ge=0.0001

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Figure 21

Heat flux as a function of location along bubble interface for wall superheat=8°C, contact angle=38 deg, pressure=1.013×105 Pa, and g/ge=0.0001

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Figure 22

Temperature distribution and velocity field for wall superheat=8°C, liquid subcooling=5°C, contact angle=38 deg, pressure=1.013×105 Pa, and g/ge=0.0001 (temperature increment between isotherms is 2.57°C)

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