Visualization of the flow between co-rotating disks in shroud with an obstruction

장애물을 포함한 동시회전 디스크 내부의 비정상 유동가시화

  • 공대위 (연세대학교 기계공학과 대학원) ;
  • 도덕희 (한국해양대 기계정보공학) ;
  • 주원구 (연세대 기계공학부)
  • Published : 2003.05.01

Abstract

Hard disk drives (HDD) in computer are used extensively as data storage capacity. The trend in the computer industry to produce smaller disk drives rotating at higher speeds requires an improved understanding of fluid motion in the space between disks. PIV measurement was used fer the unsteady flow between the center pair of four disks of four times larger than common radius of HDD disk at several rpm in a fixed cylindrical enclosure. The boundary between inner region and outer region is detected using PIV measurement and the number of dominant vortices s determined clearly. Tip vortices generated by an obstruction with actual-like configuration can be found at inner region. Oscillating flow from the obstruction appears at outer region with complex flow pattern.

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