상당저항계수식 산정을 위한 3차원 수치실험 : 횡방향 이격거리의 영향3-D Numerical Experiment for Estimation of Equivalent Resistance Coefficient due to Multi-piers : Effect of Transverse Intervals
- Other Titles
- 3-D Numerical Experiment for Estimation of Equivalent Resistance Coefficient due to Multi-piers : Effect of Transverse Intervals
- Authors
- 김형석; 최준우; 고광오; 윤성범
- Issue Date
- Jun-2009
- Publisher
- 한국해안,해양공학회
- Keywords
- drag interaction coefficient; 상당저항계수; FLOW-3D; equivalent resistance coefficient; 항력상호작용계수; transverse interval; 수치실험; 횡방향 이격거리; numerical experiment
- Citation
- 한국해안·해양공학회논문집, v.21, no.3, pp 216 - 223
- Pages
- 8
- Indexed
- KCI
- Journal Title
- 한국해안·해양공학회논문집
- Volume
- 21
- Number
- 3
- Start Page
- 216
- End Page
- 223
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/41108
- ISSN
- 19768192
- Abstract
- 수면보다 높은 사각기둥 저항체가 등간격으로 배치되어 있는 경우의 상당저항계수 식의 횡방향에 따른 항력상호작용계수를 연구하여 제안하였다. 저항체의 횡방향 이격거리에 따른 에너지 손실이 오리피스의 공극률에 따른 에너지 손실과 동일하다고 가정하고 오리피스의 에너지 손실계수를 차용하여 횡방향 항력상호작용계수를 제안하였다. 이 항력상호작용계수를 사용하는 상당저항계수 식을 김 등(2008)에 의해 사용된 수리조건에 대해 그 해석능력이 검증된 FLOW-3D를 이용하여 수치실험한 결과와 비교하였다. 그 결과가 잘 일치하였고 이로부터 바닥마찰뿐만 아니라 수면보다 높은 정방형 다열기둥의 종방향 및 횡방향 이격거리에 따라 변화되는 저항정도를 고려할 수 있는 제안된 상당저항계수 식의 타당성을 검증하였다.
A transverse drag interaction coefficient of the equivalent resistance coefficient formula for squaremulti-piers higher than water depth and arranged with equal intervals was studied. From the assumption that theenergy loss due to drag interaction according to transverse intervals of resistance bodies is essentially identical tothe energy loss due to thick orifice according to porosities, the transverse drag interaction coefficient was derivedby employing the orifice's energy loss coefficient. The equivalent resistance coefficient formula including thedrag interaction coefficient was compared with the numerical experiments using FLOW-3D, the performance ofwhich was verified by Kim et al. (2008) in the experimental condition with the multi-piers. The comparisonsshowed good agreement and thus, the equivalent resistance coefficient formula, which does not only considerfrictional resistance but also consider the multi-piers' drag resistance varied according to the intervals inlongitudinal or transverse direction, was verified.
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