Development of Aerodynamic Force Model Based on Potential Flow for Liquid Droplets Analyzed by Particle Method

抄録

This study modeled the aerodynamical effect of airflow on liquid droplets. The purpose is to simulate the deformation of droplets using the particle method without calculating the air flow field. This paper proposes the potential flow model, in which the airflow at the upstream side of a droplet is assumed to be potential flow around a circular cylinder and the corresponding pressure is applied to surface particles. It is compared with the Newton flow model, that was previously developed by the authors, by simulating droplet breakup in two-dimensions. Breakup patterns such as sheet stripping and catastrophic breakup were observed. In all cases (We = 15, 45, 150, 1000), the droplet shape was improved from when the Newton flow model was used. The model will be studied further to be applied to problems concerning the breakups and trajectories of droplets, such as water splash around aircrafts and fuel atomization.