Effects of geometrical parameters and physical properties variation on transient natural convection and conduction of high Prandtl number fluid in enclosures

摘要：

The transient laminar natural convection and conduction of high Prandtl number (Pr =1.9 × 104) fluid with variable viscosity in a cavity bounded with massive walls is numerically studied.Initially the uid in the cavity is considered to be at rest at constant temperature and the temperatureof the six walls is set to constant value through the cooling process. The effect of wall thickness (20％and 40％ cavity length), aspect ratio (1 and 0.5) and Rayleigh number (1.4 × 106and 2.7 × 107)is studied. The time evolution of the ow patterns, the temperature contours and Nusselt numbercorrelation are presented and analyzed.

关键词： natural convection conduction high Prandtl number variable viscosity

作者: O.Younis J.Pallares F.X.Grau

作者单位: Department of Mechanical Engineering, Universitat Rovira I Virgili, Tarragona, 43007 Spain;Departmen Department of Mechanical Engineering, Universitat Rovira I Virgili, Tarragona, 43007 Spain

会议类型: 国际会议

会议名称: The Fifth International Conference on Fluid Mechanics(第五届国际流体力学会议)

会议地点: 上海

会议语种:英文

在线出版日期: 2007-08-15（万方平台首次上网日期，不代表论文的发表时间）