自然对流对界面形貌、流场和温度场的影响

Effect of natural convection on interface morphology,fluid field and temperature field

为了探究固液界面形貌、界面附近流场和温度场与自然对流强度的关系,设计了实验装置,用物理模拟和数值模拟的方法,研究了自然对流强度对透明有机材料固液界面的形貌、界面附近流体速度和温度分布的影响.结果表明,自然对流使固液界面发生弯曲,界面呈不对称形状;靠近固液界面的液体以边界层的方式流动;Rayleigh数较小时,界面附近的液体温度呈线性降低;Rayleigh数较大时,远离界面的液体温度几乎是均匀的,界面处液体温度迅速降低.可见,自然对流强度是影响固液界面形貌、界面附近液体速度和温度分布的重要因素.

In order to determine the relationship of the solid-liquid interface morphology as well as both fluid field and temperature field near the interface to the natural convection intensity,an experimental device was designed.Through both physical simulation and numerical simulation,the effect of the natural convection intensity on the interface morphology as well as the distribution of velocity and temperature near the interface in organic transparent material was investigated.The experimental results show that...