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建立三维圆内开缝圆的数学模型,分别采用二维和三维SIMPLE算法QUICK格式,对王国祥实验参数下的圆内开缝圆自然对流换热问题进行数值模拟,当Ra数较小时,系统为稳态的,二维和三维数值结果均与实验结果吻合得非常好,当Ra数较大时,系统随时间振荡,整体呈现明显的三维特性,二维数值结果与实验结果的差异趋于增大,而三维数值结果与实验结果仍吻合得非常好。
The mathematic model of three-dimensional circular slits in a circle was established. The two-dimensional and three-dimensional SIMPLE algorithm QUICK scheme was used to simulate the natural convection heat transfer problem within the circle with the experimental parameters of Wang Guoxiang respectively. When the Ra number is small, the system is The steady-state, two-dimensional and three-dimensional numerical results are in good agreement with the experimental results. When the Ra number is large, the system oscillates with time, showing obvious three-dimensional characteristics as a whole. The difference between the two-dimensional numerical results and the experimental results tends to increase Large, and three-dimensional numerical results are still in good agreement with the experimental results.