【摘要】 用Galerkin有限元法数值模拟了振动斜板上的下落液体薄膜流动,研究了流场中不同强迫频率和初始扰动频率的影响.结果表明由于它们之间的相互作用,流场中出现低频信号,其在流场中的非线性效应使得表面波发生合并,加速了表面波的发展.对较高的强迫频率,这种效应更明显,且可观察到孤立包的产生.更多还原

【Abstract】 The flow of a falling liquid film on an oscillating inclined plane is simulated numerically with Galerkin finite element method.The effects of oscillating frequency and initial perturbation frequency are investigated.A low-frequency modulation signal is observed in the flow field.Nonlinear effect of the low-frequency signal in the flow field promotes the coalescence of waves on a free surface,and accelerates the development of the waves.For higher oscillating frequencies,this effect is more apparent.A solitary hump is observed in the flow.更多还原