Film boiling on downward quenching hemisphereof varying sizes

Chan S. Kim, Kune Y. Suh, Joy L. Rempe, Fan Bill Cheung, Sang B. Kim

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

Film boiling heat transfer coefficients for a downward-facing hemispherical surface are measured from the quenching tests in DELTA (Downward-boiling Experimental Laminar Transition Apparatus). Two test sections are made of copper to maintain low Biot numbers. The outer diameters of the hemispheres are 120 mm and 294 mm, respectively. The thickness of all the test sections is 30 mm. The effect of diameter on film boiling heat transfer is quantified utilizing results obtained from the test sections. The measured data are compared with the numerical predictions from laminar film boiling analysis. The measured heat transfer coefficients are found to be greater than those predicted by the conventional laminar flow theory on account of the interfacial wavy motion incurred by the Helmholtz instability. Incorporation of the wavy motion model considerably improves the agreement between the experimental and numerical results in terms of heat transfer coefficient. In addition, the interfacial wavy motion and the quenching process are visualized through a digital camera.

Original languageEnglish (US)
Pages577-585
Number of pages9
StatePublished - Dec 30 2004
Event12th International Conference on Nuclear Engineering (ICONE12) - 2004 - Arlington, VA, United States
Duration: Apr 25 2004Apr 29 2004

Other

Other12th International Conference on Nuclear Engineering (ICONE12) - 2004
CountryUnited States
CityArlington, VA
Period4/25/044/29/04

Fingerprint

Boiling liquids
Quenching
Heat transfer coefficients
Facings
Digital cameras
Laminar flow
Heat transfer
Copper

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering

Cite this

Kim, C. S., Suh, K. Y., Rempe, J. L., Cheung, F. B., & Kim, S. B. (2004). Film boiling on downward quenching hemisphereof varying sizes. 577-585. Paper presented at 12th International Conference on Nuclear Engineering (ICONE12) - 2004, Arlington, VA, United States.
Kim, Chan S. ; Suh, Kune Y. ; Rempe, Joy L. ; Cheung, Fan Bill ; Kim, Sang B. / Film boiling on downward quenching hemisphereof varying sizes. Paper presented at 12th International Conference on Nuclear Engineering (ICONE12) - 2004, Arlington, VA, United States.9 p.
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Kim, CS, Suh, KY, Rempe, JL, Cheung, FB & Kim, SB 2004, 'Film boiling on downward quenching hemisphereof varying sizes', Paper presented at 12th International Conference on Nuclear Engineering (ICONE12) - 2004, Arlington, VA, United States, 4/25/04 - 4/29/04 pp. 577-585.

Film boiling on downward quenching hemisphereof varying sizes. / Kim, Chan S.; Suh, Kune Y.; Rempe, Joy L.; Cheung, Fan Bill; Kim, Sang B.

2004. 577-585 Paper presented at 12th International Conference on Nuclear Engineering (ICONE12) - 2004, Arlington, VA, United States.

Research output: Contribution to conferencePaper

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AU - Kim, Chan S.

AU - Suh, Kune Y.

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AU - Cheung, Fan Bill

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PY - 2004/12/30

Y1 - 2004/12/30

N2 - Film boiling heat transfer coefficients for a downward-facing hemispherical surface are measured from the quenching tests in DELTA (Downward-boiling Experimental Laminar Transition Apparatus). Two test sections are made of copper to maintain low Biot numbers. The outer diameters of the hemispheres are 120 mm and 294 mm, respectively. The thickness of all the test sections is 30 mm. The effect of diameter on film boiling heat transfer is quantified utilizing results obtained from the test sections. The measured data are compared with the numerical predictions from laminar film boiling analysis. The measured heat transfer coefficients are found to be greater than those predicted by the conventional laminar flow theory on account of the interfacial wavy motion incurred by the Helmholtz instability. Incorporation of the wavy motion model considerably improves the agreement between the experimental and numerical results in terms of heat transfer coefficient. In addition, the interfacial wavy motion and the quenching process are visualized through a digital camera.

AB - Film boiling heat transfer coefficients for a downward-facing hemispherical surface are measured from the quenching tests in DELTA (Downward-boiling Experimental Laminar Transition Apparatus). Two test sections are made of copper to maintain low Biot numbers. The outer diameters of the hemispheres are 120 mm and 294 mm, respectively. The thickness of all the test sections is 30 mm. The effect of diameter on film boiling heat transfer is quantified utilizing results obtained from the test sections. The measured data are compared with the numerical predictions from laminar film boiling analysis. The measured heat transfer coefficients are found to be greater than those predicted by the conventional laminar flow theory on account of the interfacial wavy motion incurred by the Helmholtz instability. Incorporation of the wavy motion model considerably improves the agreement between the experimental and numerical results in terms of heat transfer coefficient. In addition, the interfacial wavy motion and the quenching process are visualized through a digital camera.

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Kim CS, Suh KY, Rempe JL, Cheung FB, Kim SB. Film boiling on downward quenching hemisphereof varying sizes. 2004. Paper presented at 12th International Conference on Nuclear Engineering (ICONE12) - 2004, Arlington, VA, United States.