【摘要】 研究了在重力场及微重力场下,由温度梯度引起的Marangoni对流。实验在NASA的KC-135飞机中进行,通过飞机作俯冲飞行而产生微重力场。应用激光辐照激发染料变色技术,使流体流动可视化。研究了在不同粘度的硅油与水的液-液相界面上的流体流动,借助于二维正交曲线坐标中的Navier-Stokes方程进行数值模拟,并对比了计算与实验结果。更多还原

【Abstract】 The Marangoni convection driven by temperature gradient were studied both under normal and microgravity conditions.Ex- periments were conducted both on the ground and aboard the NASA’s KC-135 parabolic flight aircraft.Photochromic Dye Activation (PDA)technique was used to visualize the fluid movement.The effect on the fluid movement at the liquid-liquid interface of silicon oils with different viscosities was studied.The numerical simulations were performed by solving the Navier-Stokes(N-S)equations in two-dimensional(2-D)general orthogonal coordinates.The computed results were compared with experimental findings.更多还原