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김진범(J. B. Kim),박경암(K. A. Park),고성호(S. Ko) 한국유체기계학회 2000 유체기계 연구개발 발표회 논문집 Vol.- No.-
Flow through turbine flow meter is simulated by solving the incompressible Navier-Stockes equations. The solution method is based on the pseudocompressibility approach and uses an implicit-upwind differencing scheme together with the Gauss-Seidel line relaxation method. The equations are solved steadily in rotating reference frames and the centrifugal force and the Coriolis force are added to the equation of motion. The standard k-ε model is employed to evaluate turbulent viscosity.
레이저 국소증착에 의한 탄소 미세 구조물 제조 및 분광분석
한성일,김진범,Selvan, J.Senthil,정성호 한국레이저가공학회 2002 한국레이저가공학회지 Vol.5 No.2
Characteristics of micro carbon structures fabricated with laser-induced chemical vapor deposition (LCVD) are investigated. An argon ion laser (λ=514.5nm) and ethylene gas were utilized as the energy source and precursor, respectively. The laser beam was focused onto a graphite substrate to produce carbon deposit through thermal decomposition of the precursor. Average growth rate of a carbon rod increased for increasing laser power and pressure. Micro carbon rods with good surface quality were obtained at near the threshold condition. Micro carbon rods with aspect ratio of about 100 and micro tubular structures were fabricated to demonstrate the possible application of this method to the fabrication of three-dimensional microstructures. Laser Raman spectroscopic analysis of the micro carbon structures revealed that the carbon rods are consisting of amorphous carbon.