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조장근(J.K. Cho),오상욱(S.W. Oh),박원규(W.G. Park),오세민(S.M. Oh),이수원(S.W. Lee) 한국전산유체공학회 1996 한국전산유체공학회 학술대회논문집 Vol.1996 No.-
The jet pump is being used in many fields for several purposes because of its simple construction and easy operation. The characteristics of the geometrical variables, pressure gradient and velocity distribution of the jet pump are studied using the CFD technique. The flow calculations through a bended nozzle, a mixing chamber and a venturi are presented and phenomenological aspects are discussed. This study solve 3-D steady incompressible Navier-Stokes equations using the Iterative time marching scheme. The governing equations are differenced with 1st-order accurate backward difference scheme for the time derivatives and 3rd-order accurate QUICK scheme for the convective terms, The Mark-and-cell concept was applied efficiently to solve continuity equation. which is differenced 2nd-order accurate central differenced scheme. The 4th-order artificial damping is added to the continuity equation for numerical stability. A O-type of grid system is generated inside a nozzle and venturi of the jet pump. It has concluded that the results of present study properly agree with physical flow phenomena.
Chimera 격자 기법을 이용한 Car-like body 주위의 전체 유동 해석
오상욱(S.W. Oh),박원규(W.G. Park) 한국전산유체공학회 1997 한국전산유체공학회 학술대회논문집 Vol.1997 No.-
This paper describes analysis of complex flow around Car-like body using Chimera grid technique. As a computational algorithm, Pullboat and Chaussee's Diagonal algorithm is selected to reduce computational time. Introducing hole points flag to this Diagonal algorithm, an algorithm for Chimera grid is generated easily. This study solves 3-D unsteady incompressible Navier-Stokes equations on a non-orthogonal curvilinear coordinate system using second-oreler accurate schemes for the time derivatives, and third/second-order scheme for the spatial derivatives. The Marker-and-cell concept is applied to efficiently solve continuity equation. The fourth-order artificial damping is added to the continuity equation for numerical stability. It bas concluded that the results of present study properly agree with physical flow phenomena.