Numerical analysis of heat transfer and flow field of pulsating flow in a transverse tube

摘要

In this paper, the flow and heat transfer of pulsating flow under low vibrational Reynolds number in a transverse tube were studied through numerical simulation method. The results showed that: the sine (or cosine) fluctuation of outlet pressure was produced by pulsating flow, furthermore, the fluctuate scope increased with increasing amplitude and frequency of pulsating flow; under low velocity and low vibrational Reynolds number, the vortices were induced to generate, migrate and shed periodically by pulsating flow; due to the growing of vortices, radial and mutual disturbance of flow were aggravated and flow boundary layer was thinner, therefore, the mass and energy transfer were enhanced; with the increasing amplitude of pulsating flow, the maximum enhanced heat transfer coefficient can reach 1.97.