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双扩散对流条件下圆柱容器内温度场和浓度场分层现象 被引量:1

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摘要 对圆柱容器内的双扩散对流进行了数值模拟,结果给出了在双扩散对流情况下温度场和浓度场非水平分层的新特征:在分层阶段,温度场竖直壁面附近的等温线高于中心轴处,浓度场则是中心轴附近的浓度等值线较高.通过与由热浮升力和溶质浮升力单独引起的自然对流产生的分层现象进行对比,阐述了产生这一非水平分层特征的机理.同时进一步探讨分析了Le数以及浮升力比Ⅳ等物性参数对这种温度场和浓度场非水平分层的影响.结果表明,随着Le数的增大(Le=1-15),一方面浓度场分层所涉及的区域越来越小,另一方面在Le数较小的时候,温度场的非水平度有所增加,当Le数增大到一定程度后,温度场的分层在容器上部有趋于水平的趋势;当浮升力比N增大时(N=0-2),浓度场的非水平分层逐渐趋于水平;温度场的非水平分层则进一步加剧.
出处 《科学通报》 EI CAS CSCD 北大核心 2006年第4期473-479,共7页 Chinese Science Bulletin
基金 国家自然科学基金(批准号:50336040)资助项目.
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参考文献22

  • 1Patterson J, Imberger J. Unsteady natural convection in a rectangular cavity. J Fluid Mechan, 1980, 100:65-86
  • 2Neumann G. Three-dimensional numerical simulation of buoyancy-driven convection in vertical cylinders heated from below. J Fluid Mechan, 1990, 214:559-578
  • 3Lin Y S, Akins R G Thermal description of pseudosteady-state natural convection inside a vertical cylinder. Intl J Heat Mass Transfer, 1986, 29:301-307
  • 4Vargas M, Sierra F Z, Ramos E, et al. Steady natural convection in a cyinder cavity. Intl Commun Heat Mass Transfer, 2002, 29:213-221
  • 5Lin W X, Armfield S W. Direct simulation of convection cooling in a vertical cylinder. Intl J Heat Mass Transfer, 1999, 42:4117-4130
  • 6Lin W X, Armfield S W. Natural convection cooling of rectangular and cylindrical containers. Intl J Heat Fluid Flow, 2001, 22:72-81
  • 7Turner J S. Double-diffusive phenomena. Annu Rev Fluid Mechan,1974, 6: 37-56
  • 8Phillips T N. Natural convection in an enclosed cavity. J Comput Phys, 1984, 54(3): 365-381
  • 9November M, Nansteel M W. Natural convection in rectangular enclosures heated from below and cooled along one side. Intl J Heat Mass Transfer, 1987, 30(11): 2433-2440
  • 10Upton T D, Watt D W. Experimental study of transient natural convection in an inclined rectangular enclosure. Intl J Heat Mass Transfer, 1997, 40(11): 2679-2690

二级参考文献15

  • 1Turner J S. Double-Diffusive Phenomena. Annu. Rev.Fluid Mech., 1974, 6:37-56.
  • 2Ghorayeb K, Khallouf H, Mojtabi A. Onset of Oscillatory Flows in Double-Diffusive Convection. International Journal of Heat and Mass Transfer, 1999, 42(4): 629-643.
  • 3Bennacer R, Mohamad A A, Akrour D. Transient Natural Convection in an Enclosure with Horizontal Temperature and Vertical Solutal Gradients. Int. J. Therm. Sci., 2001,40(10): 899-910.
  • 4Ghenai C, Mudunuri A, Lin C X, et al. Double-Diffusive Convection During Solidification of a Metal Analog System (NH4Cl-H2O) in a Differentially Heated Cavity. Experimental Thermal and Fluid Science, 2003, 28(1): 23-35.
  • 5Marcoux M, Charrier-Mojtabi M-C, Azaiez M. DoubleDiffusive Convection in an Annular Vertical Porous Layer.International Journal of Heat and Mass Transfer, 1999,42(13): 2313-2325.
  • 6Turner JS. Double-diffusive phenomena. Annu. Rev. Fluid Mech., 1974, 6:37 ~ 56
  • 7Murty VD. A finite element solution ofdouble diffusive convection. Int. Comm. Heat Mass Transfer, 1988, 15(2): 165~177
  • 8Nishimura T, Wakamatsu M, Morega AM. Oscillatory double-diffusive convection in a rectangular enclosure with combined horizontal temperature and concentration gradients. International Journal of Heat and Mass Transfer, 1998, 41 (11): 1601 ~ 1611
  • 9Ghorayeb K, Khallouf H, Mojtabi A. Onset of oscillatory flows in double-diffusive convection. International Journal of Heat and Mass Transfer,1999, 42(4): 629 ~ 643
  • 10Sundaravadivelu K, Kandaswamy P. Double diffusive nonlinear convection in a square cavity. Fluid Dynamics Research, 2000, 27 (5): 291 ~ 303

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