Essentially exact characteristics of turbulent convection in a round tube

Ly Heng, Christina Chan, Stuart W. Churchill

Research output: Contribution to journalArticle

  • 20 Citations

Abstract

The new simplified models and integral formulations recently proposed by Churchill for turbulent flow and convection are utilized herein to compute improved numerical values for the Nusselt number for fully developed convection in a uniformly heated round tube over a wide range of the Reynolds number. The results for two limiting and one intermediate value of the Prandtl number are essentially exact and those for intermediate values appear to be more accurate than previous theoretical predictions. The improved accuracy arises from the use of a theoretically based correlating equation for the turbulent shear stress as well as from the use of the integral formulations. The results are proposed as criteria for evaluation of the accuracy of experimental data, approximate computed values and correlating equations. They also serve to identify those conditions for which improved experimental or theoretically predicted values of the turbulent heat flux density (or turbulent Prandtl number) are critically needed.

Original languageEnglish (US)
Pages (from-to)163-173
Number of pages11
JournalChemical Engineering Journal
Volume71
Issue number3
DOIs
StatePublished - Dec 18 1998
Externally publishedYes

Profile

Convection
convection
Premature Rupture Fetal Membranes
Prandtl number
Epirizole
Protamine Kinase
Anthralin
Joint Instability
Alternaria
Reynolds number
turbulent flow
shear stress
heat flux
prediction
Nusselt number
Turbulent flow
Heat flux
Shear stress

Keywords

  • Heat flux density ratio
  • Heat transfer
  • Reynolds analogy
  • Turbulent heat flux density
  • Turbulent modeling

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Environmental Engineering

Cite this

Essentially exact characteristics of turbulent convection in a round tube. / Heng, Ly; Chan, Christina; Churchill, Stuart W.

In: Chemical Engineering Journal, Vol. 71, No. 3, 18.12.1998, p. 163-173.

Research output: Contribution to journalArticle

Heng, Ly; Chan, Christina; Churchill, Stuart W. / Essentially exact characteristics of turbulent convection in a round tube.

In: Chemical Engineering Journal, Vol. 71, No. 3, 18.12.1998, p. 163-173.

Research output: Contribution to journalArticle

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