Analysis of Two-Dimensional Flow and Heat Transfer in Dephased Sinusoidal Plates

摘要

A finite element code is used to obtain information regarding the two-dimensional, steady-state flow field and heat transfer in a channel formed by a pair of equal amplitude, equal wave length, sinusoidal plates at different isothermal temperatures. A sufficiently long channel with several corrugations is considered so that periodic boundary conditions aver one wave length are assumed in the flow inside the inner corrugations and the flow is assumed to be laminar. The nondimensional parameters governing the problem are similar to those encountered in compact heat exchangers. The primary objective of this study is to determine the nature of the hydrodynamics and the heat transfer characteristics as the phase angle between the geometry of the two plates is varied for a constant mean separation parameter. Quantitatively, the dimensionless pressure drop, ΔP, and Nusselt number, Nu, is found. An optimum configuration for which Nu/ΔP is the largest is determined. The results are explained in light of the hydrodynamic and thermal characteristics indicated by the numerical simulation.