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 conferencePaperpeer-review

1 Scopus citations


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)
Number of pages9
StatePublished - 2004
Event12th International Conference on Nuclear Engineering (ICONE12) - 2004 - Arlington, VA, United States
Duration: Apr 25 2004Apr 29 2004


Other12th International Conference on Nuclear Engineering (ICONE12) - 2004
Country/TerritoryUnited States
CityArlington, VA

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering


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