考虑稀薄气体效应和范德华力的二元液滴碰撞结果预测的数值方法

A numerical method for predicting binary droplet collision outcomes based on physical models is proposed. An adaptive mesh refinement (AMR) algorithm based on droplet gas film thickness was developed with the open-source solver Basilisk, and the rarefied gas effect (RGE) and van der Waals (vdW) force were cooperated in numerical calculations. The numerical method was validated using axisymmetric simulations of equal sized binary droplets head on collision, demonstrating good conservation of total energy. Although RGE does not significantly affect the current calculation results, the increment in vdW force enables this numerical method to successfully make qualitative prediction of the non-monotonic droplet collision outcomes.