基于格子Boltzmann方法的液滴撞击粗糙壁面上液膜过程的数值
发布时间:2018-06-13 02:00
本文选题:格子Boltzmann方法 + 液滴 ; 参考:《科学通报》2017年21期
【摘要】:采用格子Boltzmann方法对液滴撞击粗糙壁面上液膜的过程进行了研究,主要考察了相对液膜厚度h、相对凹槽宽度d*、相对凹槽深度L*等物理参数对界面运动过程的影响.首先,当h较小时,由液滴溅起形成的水花半径r随时间满足r/2R≈αUt/2R1/2的关系,且随着相对液膜厚度h的增大,系数a变小,但当h较大时,该关系式不能很好地描述水花半径的增长过程,且水花的飞溅现象消失.其次,相对凹槽宽度d*对水花的形成及飞溅也会产生重要影响,当d*较小时,随着d*的增大,系数a先减小再增大,当d*8时凹槽宽度的增加对水花半径的变化影响较小.最后,相对凹槽深度L*对水花的形成影响较小,但对水花的飞溅现象影响较大.
[Abstract]:The lattice Boltzmann method was used to study the effect of the physical parameters such as the thickness of the liquid film, the width of the groove, the depth of the groove, and the depth of the liquid droplet on the motion of the interface. The process of the liquid film on the surface of the rough wall was studied by using the lattice Boltzmann method. First of all, when h is small, the water spray radius r formed by droplet splashing satisfies the relation of r / 2R 鈮,
本文编号:2012127
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