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Thermophysics and Aeromechanics

, Volume 25, Issue 5, pp 705–716 | Cite as

Hydrodynamics and heat transfer for large amplitude pulsating laminar flow in channels

  • E. P. Valueva
  • M. S. Purdin
Article
  • 14 Downloads

Abstract

The heat transfer at superposition of high-frequency oscillations on a laminar flow of a liquid in flat and rectan-gular channels at a distance from an inlet of a heated site is investigated under boundary conditions on channel walls of the first and second kind. For the flat channel, the obtained analytical expressions for the amplitude and phase profiles of the longitudinal velocity oscillations are used as a function of the dimensionless oscillation frequency in the form of functions of a real variable. It is shown that the mean value taken for the perimeter of the channel and also the period of oscillations, the Nusselt number for large amplitudes of mean velocity oscillations over the cross section can signifi-cantly exceed its stationary value. The limiting value of the ratio of Nusselt numbers for a pulsating and steady flow in the region of high pulsation frequencies is found.

Key words

heat transfer pulsating laminar flow flat channel rectangular channels 

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Copyright information

© Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences 2018

Authors and Affiliations

  1. 1.National Research University “Moscow Power Engineering Institute”MoscowRussia

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