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공공누리This item is licensed Korea Open Government License

Title
Study on the Unsteady Wakes Past a Square Cylinder near a Wall
Author(s)
김태윤이동호이보성
Publication Year
2005-05-01
Abstract
Experimental and numerical studies on the unsteady wake field behind a square cylinder near a wall were conducted to find out how the vortex shedding mechanism is correlated with a gap flow. The computations were performed by solving the unsteady 2-D Incompressible Reynolds Averaged Navier-Stokes equations with the ε-SST turbulence model, which was newly developed for more accurate prediction of large separated flows. Through the spectral analysis and the smoke wire flow visualization, it was found that velocity profiles in a gap region had strong influences on the formation of vortex shedding behind a square cylinder near a wall. From these results, Strouhal number distributions could be found, and the transition region of the Strouhal number was found at G/D=0.5~0.7 above the critical gap height. In that region, the primary and minor shedding frequencies were measured. The primary shedding frequency is affected by the interaction between the upper and the lower separated shear laye
Keyword
Shedding Frequency; Separated Shear Layer; Separation Bubble; Vortex Shedding
Journal Title
Journal of Mechanical Science and Technology
Citation Volume
19
ISSN
1738-494x
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Appears in Collections:
7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/13606
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