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- Publisher
- Emerald Publishing
- Copyright
- © Emerald Publishing Limited
- ISSN
- 0961-5539
- DOI
- 10.1108/hff-10-2018-0547
- Publisher site
- See Article on Publisher Site
Abstract
This paper aims to introduce a three-dimensional smoothed particle hydrodynamics (SPH) framework for simulating supercooled large droplets (SLD) dynamics at aeronautical speeds.Design/methodology/approachTo include the effects of the surrounding air, a multiphase model capable of handling high density-ratio problems is adopted. A diffusive term is incorporated to smooth the density field and avoid numerical instabilities. Additionally, a particle shifting technique is used to eliminate anisotropic particle distributions.FindingsThe framework is validated against low-speed droplet impingement experimental results and then applied to the droplet impingement at high speeds typical of SLD conditions. Preliminary parametric studies are conducted to investigate the post-impact splashing. It is observed that a thicker water film can decrease the crown diameter and a smaller impact angle can suppress upward and forward splashing.Originality/valueA three-dimensional multiphase SPH framework for SLD dynamics at a wide range of impact speed is developed and validated. The effects of particle resolution, water film thickness and impact angle on the post-impact crown evolution are investigated.
Journal
International Journal of Numerical Methods for Heat and Fluid Flow – Emerald Publishing
Published: Aug 30, 2019
Keywords: Droplet dynamics; Multiphase smoothed particle hydrodynamics (SPH); Supercooled large droplets (SLD)