AAAR 31st Annual Conference
October 8-12, 2012
Hyatt Regency Minneapolis
Minneapolis, Minnesota, USA
Abstract View
The Effects of Small Scale Interactions on Liquid Particle Formation in Spray
WANJIAO LIU, Sean Garrick, Michael Cloeter, University of Minnesota
Abstract Number: 363 Working Group: Aerosol Physics
Abstract Droplet formation in sprays has been extensively studied in the past because of broad interest and applications. These include pharmacological applications, fuel spray inside engines, agricultural sprays, food processing, and chemical coatings. The effects of small scale interactions are critical to primary atomization and the break-up of the liquid jet. A clear understanding can provide guidance to the formation of liquid droplets and tailoring of droplet size distributions. However, the complicated interfacial or topological interactions — including primary breakup, secondary breakup and droplet coalescence — make the problem difficult to solve. High velocity, three dimensional character and dense distribution of liquid particles in gas medium also adds difficulty to experimental investigation. In this work we use the recently developed numerical tool - coupled level set and volume of fluid method (CLSVOF), to solve multiphase turbulent interfacial flow. Specifically, we will investigate the physical mechanisms underlying the liquid jet breakup process and the effect of small-scale interfacial structures on particle formation. Despite its critical role in droplet formation, the effect of small scale interactions in multiphase flows has not been extensively studied. We perform analyses on the effects of small scale interfacial structures, by carrying out a sub-grid scale analysis on the data from direct numerical simulation.