주기적인 경계조건을 사용하는 수치모사에서 계산영역 크기의 영향

다국어 초록 (Multilingual Abstract)

Effect of computational domain size in simulating of periodic obstacle flow has been investigated for the flow past tube banks. Reynolds number, defined by freestream velocity (U∞ ) and cylinder diameter (d), was fixed as 200, and center-to-center distance (P) as 1.5d. In-line square array and staggered square array were considered. Drag coefficient, lift coefficient and Strouhal number were calculated depending on domain size. Circular cylinders were implemented on a Cartesian grid system by using an immersed boundary method. Boundary condition is periodic in both streamwise and lateral directions. Previous studies in literature often use a square domain with a side length of P, which contains only one cylinder. However, this study reveals that the domain size is improper. Especially, RMS values of flow-induced forces are most sensitive to the domain size.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 수치해석 기법 및 검증
• 3. 계산영역과 경계 조건
• 4. 결과
• 5. 결론
• 후기
• 참고문헌

참고문헌 (Reference)

1 Polak, D. R., "Vortex Shedding in Normal Triangular Tube Arrays" 9 : 1-17, 1995

2 Kevlahan, N. K. -R., "Three-Dimensional Floquet Stability Analysis of the Wake in Cylinder Arrays" 592 : 79-88, 2007

3 Watterson, J. K., "Predicting Turbulent Flow in a Staggered Tube Bundle" 20 : 581-591, 1999

4 Moulinec, C., "Direct Numerical Simulation on a Cartesian Mesh of the Flow Through a Tube Bundle" 18 (18): 1-14, 2004

5 Kevlahan, N. K. -R., "Computation of Turbulent Flow Past an Array of Cylinders Using a Spectral Method with Brinkman Penalization" 20 : 333-350, 2001

6 Kim, J., "Application of a Fractional-Step Method to Incompressible Navier-Stokes Equations" 59 : 308-323, 1985

7 Kim, J., "An Immersed-Boundary Finite-Volume Method for Simulations of Flow in Complex Geometries" 171 : 132-150, 2001

8 Beale, S. B., "A Numerical Study of Unsteady Fluid Flow in In-line and Staggered Tube Banks" 13 : 723-754, 1999