ANALYSIS OF TURBULENT HEAT TRANSFER AND FLOW IN THE ENTRANCE REGIONS OF SMOOTH PASSAGES

Abstract

A previous analysis for fully developed turbulent heat transfer and flow with variable fluid properties is extended and applied to the entrance regions of tubes and parallel flat plates. Integral heat-transfer and momentum equations are used for calculating the thicknesses of the thermal and flow boundary layers. The effect of variable properties is determined for the case of uniform heat flux, uniform initial temperature distribution, and fully developed velocity distribution. A number of other cases in which the fluid properties are constant are analyzed. The predicted Nusselt numbers for air with a uniform wall temperature and uniform initial temperature and velocity distributions agree closely with experimentally determined values.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1953
Accession Number
AD0017758

Entities

People

  • Robert G. Deissler

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Boundary Layer
  • Equations
  • Friction
  • Heat Energy
  • Heat Flux
  • Heat Transfer
  • Heat Transfer Coefficients
  • Laminar Flow
  • Liquid Metals
  • Prandtl Number
  • Reynolds Number
  • Static Pressure
  • Temperature Gradients
  • Thermal Boundary Layer
  • Thermal Conductivity
  • Turbulent Flow
  • Turbulent Mixing

Readers

  • Combustion and Flow Dynamics.