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Fractional Step Method을 이용한 원형 실린더 주위의 난류 유동해석
박금성(K.S. Park),박원규(W.G. Park) 한국전산유체공학회 2003 한국전산유체공학회 학술대회논문집 Vol.2003 No.-
As computer capacity has been progressed continuously, the studies of the flow characteristics have been performing by the numerical methods actively. Recent numerical simulation has a tendency to require the higher-order accuracy in time, as well as in space. This tendency is more true in LES and acoustic noise simulation. In this study, 3-dimensional unsteady incompressible Navier-Stokes equation was solved by numerical method using the fractional step method with the fourth order compact pade scheme to achieve high accuracy. To validate the present code and algorithm, 3D flow-field around a cylinder was simulated. The drag coefficient and lift coefficient were computed and, then, compared with experiment. The present code will be tailored to LES simulation for more accurate turbulent flow analysis.
Defrost nozzle의 토출 공기에 의한 승용차 실내 유동장 및 온도장 해석
강규태(K. T. Kang),박금성(K. S. Park),박원규(W. G. Park),장기룡(K. R. Jang) 한국전산유체공학회 2002 한국전산유체공학회지 Vol.7 No.2
The velocity and temperature profiles in the cabin of the automobile affect greatly the comfortableness of passengers. In this paper, the three dimensional flow and temperature analysis in the cabin of real automobile have been performed. The three dimensional Navier-Stokes equation solver was validated by comparing with the other numerical data of a 1/5 scale model, The temperature field of cavity was also analyzed for the validation of energy' equation solver. After the code validation, the numerical analysis of real field of flow and temperature of an automobile was performed and the present result provides the insight of flow and temperature field of the inside of cabin.
Fractional Step 방법과 Compact Pade 차분화를 이용한 원형 실린더 주위의 난류 유동해석
정상희(S.H.Chung),박금성(K.S.Park),박원규(W.G.Park) 한국전산유체공학회 2003 한국전산유체공학회지 Vol.8 No.3
Recent numerical simulation has a tendency to require the higher-order accuracy in time, as well as in space. This tendency is more true in LES and acoustic noise simulation. In the present work, the accuracy of a Fractional step method, which is widely used in LES simulation, has been increased to the fourth-order accurate compact Pade discretization. To validate the present code, the flow-field past a cylinder was simulated and compared with experiment. A good agreement with experiment was achieved.