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3차원 튜브 뱅크 주위의 난류 유동장 및 열전달에 대한 수치 해석적 연구
박상길,김경원,유홍선,최영기,Park, S.K.,Kim, K.W.,Ryou, H.S.,Choi, Y.K. 대한설비공학회 1996 설비공학 논문집 Vol.8 No.3
Turbulent flow and heat transfer characteristics around staggered tube banks were studied using the 3-D Navier-Stokes equations and energy equation governing a steady incompressible flow, which were reformulated in a non-orthogonal coordinate system with cartesian velocity components and discretized by the finite volume method with a non-staggered variable arrangement. The predicted turbulent kinetic energy using RNG $k-{\varepsilon}$ model was lower than that of standard $k-{\varepsilon}$ model but showed same result for mean flow field quantities. The prediction of the skin friction coefficient using RNG $k-{\varepsilon}$ model showed better trend with experimental data than standard $k-{\varepsilon}$ model result. The inclined flow showed higher velocity and skin friction coefficient than transverse flow because of extra strain rate ($\frac{{\partial}w}{{\partial}y}$). Also, this was why the inclined flow showed higher local heat transfer coefficient than the transverse flow.
최용호(Y.H. Choi),권순홍(S.H. Kwon),김대웅(D.W. Kim),박상길(S.K. Park) 한국해양공학회 1995 韓國海洋工學會誌 Vol.9 No.2
This paper investigates the problem of random analysis of fixed structures which are influenced by waves and current. Morison equation was employed to deal with the wave spectrum. The necessary statistics are calculated from the resulting response time history. The simulation results are turned out to be very sensitive to the simulation technique.