Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Mixed-Convection in an Annulus Between Co-Rotating Horizontal Cylinders

동시 회전하는 수평 실린더 내 환상공간에서의 혼합대류

  • 이관수 (한양대학교 기계공학부) ;
  • 김양현 (조선이공대학 건축환경설비과) ;
  • 임광옥 (한양대학교 BK21 기계사업단)
  • Published : 2002.04.01
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Abstract

Numerical analysis has been carried out for two-dimensional steady and unsteady mixed convection in the annulus between co-rotating horizontal cylinders with a heated inner cylinder. The ratio of annulus gap($\sigma$) is taken from 1 to 10 and the order of mixed-convection parameter B(=Gr/(1+Re)$^2$) varies from 10$^4$to $10^0$. The flow patterns over this parameter range are steady multicellular, oscillatory multicellular or steady unicellular. The addition of co-rotating of both cylinders stabilizes the flow in the annulus and weakens the unsteadiness. Even in the large values of rotating parameter such as of $10^0$/($\sigma$=2) and 10$^2$($\sigma$=10), the flow pattern becomes asymptotic to the steady unicellular flow, like as in the rigid-body rotating flow.

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References

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