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ANALYTIC PREDICTION OF THE FRICTION FACTOR FOR TURBULENT FLOW IN INTERNALLY FINNED CHANNELS.

Author(s) : SCOTT M. J., WEBB R. L.

Type of article: Article

Summary

UNTIL THIS WORK, NO ANALYTICAL MODELS FOR THE TURBULENT FRICTION FACTOR HAVE BEEN PROPOSED. THE PRESENT MODEL ASSUMES THE VALIDITY OF THE LAW OF THE WALL AND APPLIES THE LOGARITHMIC VELOCITY DISTRIBUTION TO THE INTERFIN AND CORE REGIONS OF THE FLOW. THEORETICALLY BASED FRICTION FACTOR EQUATIONS ARE DEVELOPED FOR INTERNALLY FINNED CIRCULAR TUBES AND RECTANGULAR CHANNELS. THE MODEL PREDICTS CARNAVOS DATA FOR 21 INTERNALLY FINNED TUBES WITHIN ABOUT 10 PERCENT. FRICTION FACTOR DATA WERE TAKEN FOR FIVE INTERNALLY FINNED, RECTANGULAR CHANNELS WITHIN ABOUT 10 PERCENT, EXCEPT FOR THE CASE OF A VERY HIGH FIN.

Details

  • Original title: ANALYTIC PREDICTION OF THE FRICTION FACTOR FOR TURBULENT FLOW IN INTERNALLY FINNED CHANNELS.
  • Record ID : 1982-1166
  • Languages: English
  • Source: J. Heat Transf. - vol. 103 - n. 3
  • Publication date: 1981/08
  • Document available for consultation in the library of the IIR headquarters only.

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