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

  • 제26권4호
  • /
  • Pages.622-628
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  • 2002
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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동시 회전하는 수평 실린더 내 환상공간에서의 혼합대류

Mixed-Convection in an Annulus Between Co-Rotating Horizontal Cylinders

  • 이관수 (한양대학교 기계공학부) ;
  • 김양현 (조선이공대학 건축환경설비과) ;
  • 임광옥 (한양대학교 BK21 기계사업단)
  • 발행 : 2002.04.01
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초록

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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참고문헌

  1. Coles D., 1965, 'Transition in Circular Couette Flow,' J. Fluid Mech., Vol. 23, part 3, pp. 385-425 https://doi.org/10.1017/S0022112065001441
  2. 정재동, 김찬중, 유호선, 이준식, 1997, '수평동심환상공간내 자연대류의 다중해에 관한 수치적 연구,' 대한기계학회논문집(B), 제21권 제2호, pp. 252-263
  3. 유주식, 1998, '수평 환형공간에서의 낮은 Prnadtl 수 유체의 자연대류,' 대한기계학회논문집(B), 제22권 제12호, pp. 1784-1795
  4. Yoo J. S., Choi J. Y. and Kim M. U., 1994, 'Multicellular Natural Convection of a Low Prandtl Number Fluid between Horizontal Concentric Cylinders,' Numerical Heat Transfer, Part A, Vol. 25, pp. 103-115 https://doi.org/10.1080/10407789408955939
  5. Yoo J. S., 1996, 'Dual Steady Solutions in Natural Convection between Horizontal Concentric Cylinders,' Int. J. Heat and Fluid Flow, Vol. 17, No. 6, pp. 587-593 https://doi.org/10.1016/S0142-727X(96)00064-1
  6. Fant D. B., Prusa J. and Rothmayer A. P., 1990, 'Unsteady Multicellular Natural Convection in a Narrow Horizontal Cylindrical Annulus,' J. of Heat Transfer, Vol. 112, pp. 379-387 https://doi.org/10.1115/1.2910388
  7. Fusegi T., Farouk B. and Ball K. S., 1986, 'Mixed-Convection Flows within a Horizontal Concentric Annulus with a Heated Rotating Inner Cylinder,' Numerical Heat Transfer, Vol. 9, pp. 591-604 https://doi.org/10.1080/10407788608913495
  8. Patankar S. V., 1980, Numerical Heat Transfer and Fluid Flow, McGraw-Hill
  9. Lin D. and Yan W. M., 2000, 'Experimental Study of Unsteady Thermal Convection in Heated Rotating Inclined Cylinders,' Int. J. of Heat and Mass Transfer, Vol. 43, pp. 3359-3370 https://doi.org/10.1016/S0017-9310(99)00380-4
  10. Int. J. of Heat and Mass Transfer v.43 Experimental Study of Unsteady Thermal Convection in Heated Rotating Inclined Cylinders Lin D.;Yan W. M. https://doi.org/10.1016/S0017-9310(99)00380-4