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FLOW REGIME TRANSITION CRITERIA FOR UPWARD TWO-PHASE FLOW IN VERTICAL TUBES.

Author(s) : MISHIMA K., ISHII M.

Type of article: Article

Summary

IT IS POSTULATED THAT DIRECT GEOMETRICAL PARAMETERS SUCH AS THE VOID FRACTION ARE CONCEPTUALLY SIMPLE AND THEREFORE RELIABLE PARAMETERS TO BE USED IN FLOW-REGIME CRITERIA. FROM THIS POINT OF VIEW, NEW FLOW-REGIME CRITERIA FOR UPWARD GAS-LIQUID FLOW IN VERTICAL TUBES HAVE BEEN DEVELOPED CONSIDERING THE MECHANISMS OF FLOW-REGIME TRANSITIONS. THESE NEW CRITERIA CAN BE COMPARED TO EXISTING CRITERIA AND EXPERIMENTAL DATA UNDER STEADY-STATE AND FULLY DEVELOPED FLOW CONDITIONS BY USING RELATIVE VELOCITY CORRELATIONS. THE CRITERIA SHOWED REASONABLE AGREEMENTS WITH THE EXISTING DATA FOR ATMOSPHERIC AIR-WATER FLOWS. THE PRESENT FLOW-REGIME TRANSITION CRITERIA CAN BE APPLIED OVER WIDE RANGES OF PARAMETERS AS WELL AS TO BOILING FLOW.

Details

  • Original title: FLOW REGIME TRANSITION CRITERIA FOR UPWARD TWO-PHASE FLOW IN VERTICAL TUBES.
  • Record ID : 1984-2233
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 27 - n. 5
  • Publication date: 1984/05

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