NOTES ON THE LIQUID-METAL BOILING PHENOMENON

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A brief review of boiling for ordinary fluids with emphasis on the wall superheat required for bubble initation from different surfaces at varying pressures is presented. Calculations based on an equation valid for normal fluids indicate that superheats from two to eight times that for water are required to initiate a vapor bubble in some of the alkali metals. The high superheat and the high thermal conductivity peculiar to liquid metals are combined to explain the unstable liquid-metal boiling phenomenon in natural- and forced-circulation loops. Forced-convection boiling-potassium heat-transfer coefficients correlated by the Locknart-Martinelli two-phase flow parameter are in reasonable agreement ... continued below

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Pages: 33

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Krakoviak, A I July 10, 1963.

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Description

A brief review of boiling for ordinary fluids with emphasis on the wall superheat required for bubble initation from different surfaces at varying pressures is presented. Calculations based on an equation valid for normal fluids indicate that superheats from two to eight times that for water are required to initiate a vapor bubble in some of the alkali metals. The high superheat and the high thermal conductivity peculiar to liquid metals are combined to explain the unstable liquid-metal boiling phenomenon in natural- and forced-circulation loops. Forced-convection boiling-potassium heat-transfer coefficients correlated by the Locknart-Martinelli two-phase flow parameter are in reasonable agreement with the forced-convection boiling-water data of Dengler and Addoms. Some recomraendations on bubble initiation sites and future work with liquid metals are also included. (auth)

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Pages: 33

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  • Other Information: Orig. Receipt Date: 31-DEC-63

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  • Report No.: ORNL-TM-618
  • Grant Number: W-7405-ENG-26
  • DOI: 10.2172/4630817 | External Link
  • Office of Scientific & Technical Information Report Number: 4630817
  • Archival Resource Key: ark:/67531/metadc1032700

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  • July 10, 1963

Added to The UNT Digital Library

  • Oct. 18, 2017, 7:39 a.m.

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  • Oct. 24, 2017, 9:50 p.m.

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Krakoviak, A I. NOTES ON THE LIQUID-METAL BOILING PHENOMENON, report, July 10, 1963; Oak Ridge, Tennessee. (digital.library.unt.edu/ark:/67531/metadc1032700/: accessed January 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.