HEAT TRANSFER TO A BOILING LIQUID MECHANISM AND CORRELATIONS. Progress Report No. 7 (58-40)

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Various heat transfer mechanisms which have been previously proposed are analyzed in the light of recent experiments. Evidence is presented in favor of a liquid-vapor exchange mechanism and against the widely accepted "micro-convection" mechanism. The vapor-liquid exchange rnechanism is shown to explain the insensltivity of boiling heat flux to the level of subcooling. A "Reynolds Analogy" for nucleate boiling is presented in some detail. A procedure is given for calculating the superheat at which the liquid bulk velocity ceases to contribute to the heat flux. An expression for the growth of a vapor bubble in a highly superheated liquid is ... continued below

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Forster, K. & Greif, R. May 28, 1958.

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Various heat transfer mechanisms which have been previously proposed are analyzed in the light of recent experiments. Evidence is presented in favor of a liquid-vapor exchange mechanism and against the widely accepted "micro-convection" mechanism. The vapor-liquid exchange rnechanism is shown to explain the insensltivity of boiling heat flux to the level of subcooling. A "Reynolds Analogy" for nucleate boiling is presented in some detail. A procedure is given for calculating the superheat at which the liquid bulk velocity ceases to contribute to the heat flux. An expression for the growth of a vapor bubble in a highly superheated liquid is deduced. A method is presented which allows the deduction of correlations for nucleate boiling which give the dependence of heat flux on superheat and system pressure. Two such correlations are presented and results are compared with experiment. It is shown that one correlation yields the heat flux for different liquids varying from water to mercury, without necessitating any change in constant or exponent of the correlation. (auth)

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  • Other Information: Orig. Receipt Date: 31-DEC-59

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  • Report No.: AECU-3843
  • Grant Number: AT(11-1)-34
  • Grant Number: PROJECT 34
  • DOI: 10.2172/4298039 | External Link
  • Office of Scientific & Technical Information Report Number: 4298039
  • Archival Resource Key: ark:/67531/metadc1024795

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  • May 28, 1958

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  • Oct. 15, 2017, 10:09 p.m.

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  • Jan. 30, 2018, 12:28 p.m.

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Forster, K. & Greif, R. HEAT TRANSFER TO A BOILING LIQUID MECHANISM AND CORRELATIONS. Progress Report No. 7 (58-40), report, May 28, 1958; United States. (digital.library.unt.edu/ark:/67531/metadc1024795/: accessed December 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.