설비공학논문집 (Korean Journal of Air-Conditioning and Refrigeration Engineering)

  • 제12권8호
  • /
  • Pages.755-762
  • /
  • 2000
  • /
  • 1229-6422(pISSN)
  • /
  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지

일정 열 유속으로 냉각되는 안쪽 실린더를 갖는 수평 환형 공간에서의 공기의 자연 대류

Natural Convection of Air in a Horizontal Annulus with the Inner Cylinder Cooled by Constant Heat Flux

  • 유주식 (안동대학교 기계공학교육과) ;
  • 엄용균 (안동대학교 기계공학과) ;
  • 김용진 (한국기계연구원 열유체 환경연구부)
  • 발행 : 2000.08.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Natural convection of air in a horizontal annulus with the inner cylinder cooled by the application of a constant heat flux and the isothermally heated outer cylinder is considered. The bifurcation phenomenon of flow patterns and the heat transfer characteristics are numerically investigated. The zero initial condition induces a unicellular flow in a half annulus. A bicellular flow consisting of two counter-rotating eddies in a half annulus can be obtained above a certain critical Rayleigh number. A transition from the bicellular to the unicellular flow occurs with a decrease in Rayleigh number. Hysteresis phenomena have not been observed. In the regime of dual flows, the overall Nusselt number of the bicellular flow is greater than that of the unicellular flow.

키워드

참고문헌

  1. Buoyancy-induced Flows and Transport Gebhart, B.;Jaluria, Y.;Mahajan, R. L.;Sammakia, B
  2. J. Heat Transfer v.91 Free convective flow patterns in cylindrical annuli Powe, R. E.;Carley, C. T.;Bishop, E. H.
  3. Int. J. Heat Mass Transfer v.28 Flow patterns of natural convection in horizontal cylindrical annuli Rao, Y. F.;Miki, Y.;Fukuda, K.;Takata, Y.;Hasegawa, S.
  4. Journal of Heat Transfer v.114 Free two-dimensional convective bifurcation in a horizontal annulus Cheddadi, A.;Caltagirone, J. P.;Mojtabi, A.;Vafai, K.
  5. Int. J. of Heat and Fluid flow v.17 Dual steady solutions in natural convection between horizontal concentric cylinders Yoo, J. -S.
  6. Quarterly Journal of Mechanics and Applied Mathematics v.21 Natural convection between horizontal concentric cylinders for low Rayleigh numbers Mack, L. R.;Bishop, E. H.
  7. J. Heat Transfer v.99 Thermoconvective motion of low Prandtl number fluids within a horizontal cylindrical annulus Custer, J. R.;Shaughnessy, E. J.
  8. J. Heat Transfer v.101 Numerical solution of a flow due to natural convection in horizontal cylindrical annulus Charrier-Mojtabi, M. C.;Mojtabi, A.;Caltagirone, J. P.
  9. J. Heat Transfer v.112 Unsteady multicellular natural convection in a narrow horizontal cylindrical annulus Fant, D. B.;Prusa, J.;Rothmayer, A. P.
  10. Numerical Heat Transfer v.25 Multicellular natural convection of a low Prandtl number fluid between horizontal concentric cylinders Yoo, J. -S.;Choi, J. Y.;Kim, M. -U.
  11. Int. J. Heat and Mass Transfer v.30 A Study of laminar natural convection in a nonuniformly heated annular fluid layer Prud'homme, M.;Robillard, L.;Vasseur, P.
  12. Int. J. Heat Mass Transfer v.31 Study of natural convection in horizontal annuli Kumar, P.
  13. Int, J. Heat Mass Transfer v.31 Laminar natural convection of cold water enclosed in a horizontal annulus with mixed boundary conditions Ho, C. J.;Lin, Y. H.
  14. Int, J. Heat Mass Transfer v.31 Non-stationary conjugate free convective heat transfer in horizontal cylindrical coaxial channels Kolesnikov, P. M.;Bubnovich, V. I.
  15. Int. J. of Heat and Mass Transfer v.41 Mixed convection of air between two horizontal Concentric cylinders with a cooled rotating outer cylinder Yoo, J. -S.
  16. Int. J. of Heat and Mass Transfer v.41 Natural convection in a narrow horizontal cylindrical annulus Yoo, J. -S
  17. Int. J. of Heat and Mass Transfer v.42 Transition and multiplicity of flows in natural convection in narrow horizontal cylindrical annulus : Ργ=0.4 Yoo, J. -S
  18. Int. J. of Heat and Mass Transfer v.42 Prandtl number effect on bifurcation and dual solutions in natural convection in a horizontal annulus Yoo, J. -S.
  19. Numerical Heat Transfer v.10 Constant heat flux solutions for natural convection between concentric and eccentric horizontal cylinders Glakpe, E. K.;Watkins, Jr. C. B.
  20. Transition to turbulence in Rayleigh-Benard convection. In Topics in Applied Physics v.45 Busse, F. H.;H. L. Swinney(ed.);J. P. Gollub.(ed.)
  21. Computational Fluid Dynamics Roache, P. J.
  22. SIAM J. Numer. Anal v.7 On direct methods for solving Poisson's equations Buzbee, B. L.;Golub, G. H.;Nielson, C. W.