Laminar Flow Heat Exchangers. Viscosity Induced Non-Uniform Flow.

Abstract

Laminar flow heat exchangers which cool oil in non-interconnected parallel passages can experience non-uniform flows and reduction in the effective heat exchanger coefficient in a range of Reynolds number which varies with tube length and diameter, tube wall temperature and fluid inlet temperature. The method of predicting the reduction in effective heat transfer coefficient and the range of Reynolds number over which these instabilities exist is presented for a particular oil Mobil aviation oil 120. Also included is the prediction of the effect of radial viscosity variation on the constant property magnitudes of friction and heat transfer coefficient.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1984
Accession Number
ADA144777

Entities

People

  • G. R. Putnam

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Coefficients
  • Engineering
  • Equations
  • Flow
  • Flow Rate
  • Fluid Flow
  • Heat Exchangers
  • Heat Transfer
  • Heat Transfer Coefficients
  • Laminar Flow
  • Lepidoptera
  • Mechanical Engineering
  • Reynolds Number
  • Steady State
  • Thermal Conductivity

Readers

  • Combustion and Flow Dynamics.
  • Petroleum Engineering