發(fā)布時間：2018-06-13 02:00

  本文選題：格子Boltzmann方法 + 液滴��； 參考：《科學(xué)通報》2017年21期

【摘要】：采用格子Boltzmann方法對液滴撞擊粗糙壁面上液膜的過程進行了研究,主要考察了相對液膜厚度h、相對凹槽寬度d*、相對凹槽深度L*等物理參數(shù)對界面運動過程的影響.首先,當(dāng)h較小時,由液滴濺起形成的水花半徑r隨時間滿足r/2R≈αUt/2R1/2的關(guān)系,且隨著相對液膜厚度h的增大,系數(shù)a變小,但當(dāng)h較大時,該關(guān)系式不能很好地描述水花半徑的增長過程,且水花的飛濺現(xiàn)象消失.其次,相對凹槽寬度d*對水花的形成及飛濺也會產(chǎn)生重要影響,當(dāng)d*較小時,隨著d*的增大,系數(shù)a先減小再增大,當(dāng)d*8時凹槽寬度的增加對水花半徑的變化影響較小.最后,相對凹槽深度L*對水花的形成影響較小,但對水花的飛濺現(xiàn)象影響較大.
[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，

本文編號：2012127