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다공성 벽면(porous-wall)과 거칠기가 있는 벽면(rough-wall)에 관한 경계조건을 이용한 초음속 흐름의 수치모사
곽인근(E.K. Kwak),유일용(I.Y. Yoo),이동훈(D.H. Lee),이승수(S. Lee) 한국전산유체공학회 2009 한국전산유체공학회지 Vol.14 No.4
The existing code which solves two-dimensional RANS(Reynolds Averaged Navier-Stokes) equations and 2-equation turbulence model equations was modified to enable numerical simulation of various supersonic flows. For this, various boundary conditions have been implemented to the code. Bleed boundary condition was incorporated into the code for calculating wall mean flow quantities. Furthermore, boundary conditions for the turbulence quantities along rough surfaces as well as porous walls were applied to the code. The code was verified and validated by comparing the computational results against the experimental data for the supersonic flows over bleed region on a flat plate. Furthermore, numerical simulations for supersonic shock boundary layer interaction with a bleed region were performed and their results were compared with the existing computational results.
군산지역 택시 운전기사의 혈액, 뇨 및 모발의 중금속 함량에 관한 조사 : Driver of Kun San Area
황인담,이종섭,유일수,김흥두 대한보건협회 1992 대한보건연구 Vol.18 No.1
Heavy metals in bood, urine and hair of 90 taxi-drivers in kunsan city and 60 rural inhabitants (seong-san Meyon, Okugun) were examined during from Februry to August, 1991. The average amounts of heavy metals in each group are summarized as faelows; 1. Blood - Lead contents were 23.70mg/dl in driver and 18.12mg/dl in rural inhabitants; and cadmium were 0.16mg/dl and 0.12mg/di respectively. 2. Urine - Lead contents were 33.86mg/i and 28.31mg/i in drivers group and rural inhabitants respedctively: candmium were 0.15mg/dl and 0.13mg/dl in rural inhabitants, and driver group respectively. 3. Hair - Lead cantents were 10.26mg/kg in driver and 6.94mg/kg in urral inhabitants: Cadmium were 0.52mg/kg and 0.40mg/kg in drivers and rural inhabitants respectively.