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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록· 키워드
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The flow around a circular cylinder advancing beneath the free is numerically investigated using a VOF method. The simulations cover Froude numbers in the range of 0.2~0.6 and gap ratios (h/d) in the range of 0.1~2.0, where h is the distance from the free surface to a cylinder, and d is the diameter of a cylinder at Reynolds number 180. It is observed that the vortex suppression effect surface deformation increase as the gap ratio decreases or the Froude number increase. The most important results of the present study are as follows. The proximity of the free surface causes an initial increase in the Strouhal number and drag coefficient, and the maximum Strouhal number and drag coefficient occur in the range of 0.5~0.7. However, this trend reverses as the gap ratio becomes small, and the life coefficient increases downward as the gap ratio decreases.
목차
ABSTRACT
1. 서론
2. 문제의 설정과 수치 해석 방법
3. 유동특성에 미치는 자유표면 효과
4. 결론
References
참고문헌 (17)
참고문헌 신청
1. [학술지(정기간행물)] - Barkley, D. / 1996 / Three Dimensional Floquet Stability Analysis of the Wake of a Circular Cylinder / J. Fluid Mech 322 : 215 ~ 241
2. [학술지(정기간행물)] - Bearman, P. W. / 1978 / Flow Around a Circular Cylinder Near a Plane Boundary / J. Fluid Mech. 89 : 33 ~ 47
3. [학술지(정기간행물)] - Bloor, M. S. / 1964 / The Transition to Turbulence in the Wake of a Circular Cylinder / J. Fluid Mech 19 : 290 ~ 304
4. [학위논문] - Göktun, S. / 1975 / The Drag and Lift Characteristics of a Sylinder Placed near a Plane Surface / 석사 / Naval Postgraduate School
5. [학술지(정기간행물)] - Jeon, W. S. / 1996 / Experimental Study of Flow Fields around Cylinder Arrays Using PIV / Journal of Ocean Engineering and Technology 10 (3) : 83 ~ 88
2. [학술지(정기간행물)] - Bearman, P. W. / 1978 / Flow Around a Circular Cylinder Near a Plane Boundary / J. Fluid Mech. 89 : 33 ~ 47
3. [학술지(정기간행물)] - Bloor, M. S. / 1964 / The Transition to Turbulence in the Wake of a Circular Cylinder / J. Fluid Mech 19 : 290 ~ 304
4. [학위논문] - Göktun, S. / 1975 / The Drag and Lift Characteristics of a Sylinder Placed near a Plane Surface / 석사 / Naval Postgraduate School
5. [학술지(정기간행물)] - Jeon, W. S. / 1996 / Experimental Study of Flow Fields around Cylinder Arrays Using PIV / Journal of Ocean Engineering and Technology 10 (3) : 83 ~ 88
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UCI(KEPA) : I410-ECN-0101-2014-550-002762869