Open AccessNumerical simulation of droplet impact onto liquid films with smoothed particle hydrodynamics
Author(s) -
Liqiang Ma,
Moubin Liu,
Jianzhong Chang,
Su Tie-Xiong,
Hantao Liu
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.244701
Subject(s) - smoothed particle hydrodynamics , surface tension , mechanics , drop (telecommunication) , materials science , computer simulation , free surface , particle (ecology) , physics , thermodynamics , computer science , oceanography , geology , telecommunications
In this paper, we present a modified smoothed particle hydrodynamics (SPH) method. In order to well predict the morphology change of liquid drop, the presented SPH method employs a kernel gradient correction and a coupled solid boundary treatment algorithm. An inter-particle interaction force is used to model surface tension, and an artificial stress model is used to deal with tensile instability. The process of droplet impacting on liquid film is numerically simulated by the modified SPH method, which can well predict the pressure field evolution process of the drop impacting onto the liquid film and capture the variation of the free surface at different instants. Effects of Web number and surface stress on droplet impacting are also investigated, and mechanism of droplet splashing is analyzed. It is clearly demonstrated that the modified SPH method can effectively describe the dynamics of droplet splashing and the variation of the free surface. The obtained liquid drop morphology accords well with the results from other sources.