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http://dx.doi.org/10.3795/KSME-B.2009.33.5.349

Effect of Domain Size on Flow Characteristics in Simulating Periodic Obstacle Flow  

Choi, Choon-Bum (인하대학교 기계공학과 대학원)
Jang, Yong-Jun (한국철도기술연구원)
Kim, Jin-Ho (한국철도기술연구원)
Han, Seok-Youn (한국철도기술연구원)
Yang, Kyung-Soo (인하대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.33, no.5, 2009 , pp. 349-357 More about this Journal
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 ($U_{\infty}$) 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.
Keywords
Tube Banks; Periodic Boundary Condition; Computational Domain; Immersed Boundary Method;
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