Numerical Analysis of Flow and Heat Transfer in Duct with Repeated Cylindrical Blockages by Non-orthogonal Coordinate Transformation

주기적인 원주형 장애물이 있는 덕트유동 및 열전달의 비직교좌표변환에 의한 해석

This paper is concerned with the prediction of two dimensional turbulent flows in the parallel plate with the repeated cylindrical blockages. The purpose of this paper is to find the effect of the eccentricity and the pitch of the repeated cylindrical blockages on the flow field, heat transfer coefficients and friction factors. A special technique is developed for the solution of the fully developed turbulent recirculating flow, in which the flow field varies periodically. A non-othogonal coordinate transformation is employed to solve the momentum and the energy equations. The results show that the pitch ratio or the eccentricity of the repeated blockages become smaller, or the Reynolds number of the flow larger, friction factors and heat transfer coefficients increase.