고체 표면에 충돌하는 뉴턴 액적에 대한 최대 액막 직경 모델 검토

Abstract

The maximum spreading is the maximum extent to which a drop can spread after impacting on a surface. It is one of the crucial factors determining the spraying performance in many applications. In this study, the existing maximum spreading models for a Newtonian liquid droplet impacting on a dry solid surface were reviewed and compared with the experimental results over the ranges of 4 ≤ Re ≤ 11700, 23 ≤ We ≤ 786, and 37.9° ≤ θs, ≤ 107.1°. The surface wettability was found to have only a minor influence on the maximum spreading, compared to the liquid viscosity and impact velocity. Among the models tested, the Roisman (2009) model showed the best agreement with the experimental results, matching 80% of the measured data within ±5%. © 2012 The Korean Society of Mechanical Engineers.