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Flow characteristics along and above dimpled surfaces with three different dimple depths within a channel
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  • Flow characteristics along and above dimpled surfaces with three different dimple depths within a channel
  • Flow characteristics along and above dimpled surfaces with three different dimple depths within a channel
저자명
Won. S.Y.,Ligrani. P.M.
간행물명
Journal of mechanical science and technology
권/호정보
2007년|21권 11호|pp.1901-1909 (9 pages)
발행정보
대한기계학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The effects of dimples in altering time-averaged flow behavior occur mostly within one-half of one dimple print diameter from the surface, and the dimples within the mays periodically eject a primary vortex pair from each dimple, which exists in conjunction with edge vortek pairs that form along the spanwise edges of staggered dimples regardless of three dimple depths. As the dimple depth increases, deeper dimples eject stronger primary vortex pairs, with big her levels of turbulence transport due to larger deficits of time-averaged, normalized total pressure and streamwise velocity as the surfaces with deeper dimples are approached. Primary vortek pair ejection frequencies range about 7-9 Hz, and edge vortek pair oscillation frequencies range about 5-7 Hz for $Re_H=20,000$, regardless of dimple depths.