The motion process of a droplet on a circular cylinder based on the lattice Boltzmann method
The motion process of a single droplet on a cylindrical wall under gravity is simulated by using the pseudo-potential lattice Boltzmann method with a large density ratio multiphase flow model based on the real fluid state equation.The results indicate that as the hydrophobicity of the cylindrical surface progressively increases along the direction of gravity,the motion of droplet can be split into two stages:spreading and sliding.The wall wettability distribution and its change rate will affect the droplet motion process.When the droplet moves to the lower half of the cylinder,its average velocity,maximum velocity,attachment length and droplet height begin to differentiate with time.In addition,the horizontal and vertical components of the adhesion force acting on the droplet reached a maximum when it started and fully moved to the lower half of the cylinder,respectively.These findings provide important theoretical support for a deeper understanding of the droplet motion characteristics on the circular cylinder.
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维普
