AN ANALYSIS OF CONVECTIVE HEAT TRANSFER FOR PULSATING FLOW IN A TUBE

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Abstract
An analysis of fully developed pipe flow in the presence of longitudinal periodic pulsations is presented. Turbulent exchange is assumed stationary to determine the influence of coupling of mean velocity and temperature transients on heat transfer. For a constant wall heat flux, the effects are generally small indicating that turbulence generated by the pulsating flow is the probable dominant factor in experimentally observed large increases in heat transfer. The Nusselt number is shown to depend on a vibrational Reynolds number and amplitude ratio. The Prandtl number dependency is such that effects are amplified by pulsations of fluids of Prandtl numbers well below unity.

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