The Effects of Wavy Plate Phase Shift on Flow and Heat Transfer Characteristics in Corrugated Channel

Abstract

The heat transfer and flow characteristics in corrugated sinusoidal wavy channels for different phase shift between the upper and lower wavy plates with the same equivalent diameter have been numerically investigated. The computations are performed on uniform wall temperature for air (Pr=0.696) over a range of Reynolds number(Re), 2000≤Re≤10000. The effects of phase shift and Re on flow and heat transfer are discussed. The relative thermalhydraulic performance enhancement is evaluated. Simulation results show that the corrugated channels have a significant heat transfer enhancement accompanied by increased pressure loss penalty, and the effect of phase shift on the flow and heat transfer is more pronounced in higher Re region than in lower Re region. For all channels the goodness factor G decreases with the increasing Re, and the G value is beyond 1 with the exception of the channel of 180°phase shift channel. The optimal performance is achieved on 0° phase shift channel in lower Re region.