Modeling of Large Droplets Impingement Using a Hybrid Taylor-Galerkin Variational Multi-Scale Stabilized Level Set Method

Bakkar, Ahmed; Habashi, Wagdi G.; Fossati, Marco

doi:10.2514/6.2016-1339

54th AIAA Aerospace Sciences Meeting 2016

DOI: 10.2514/6.2016-1339

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Modeling of Large Droplets Impingement Using a Hybrid Taylor-Galerkin Variational Multi-Scale Stabilized Level Set Method

Ahmed Bakkar

Wagdi G. Habashi

Marco Fossati

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2019

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“…Interface-capturing can decrease the computational time significantly for handling complicated interface motions (Tezduyar, 2002). High-speed droplet impingement has been demonstrated (Bakkar et al, 2016;Guo et al, 2016), where the interface was captured using the level-set method and the moment-offluid method, respectively. However, interface-capturing methods cannot strictly satisfy mass conservation (Tezduyar, 2002).…”

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A multiphase SPH framework for supercooled large droplets dynamics

Cui

Bakkar

Habashi

2019

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Purpose 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/approach To 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. Findings The 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/value A 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.

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confidence: 99%

A multiphase SPH framework for supercooled large droplets dynamics

Cui

Bakkar

Habashi

2019

HFF

Self Cite

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Modeling of Large Droplets Impingement Using a Hybrid Taylor-Galerkin Variational Multi-Scale Stabilized Level Set Method

Cited by 1 publication

References 13 publications

A multiphase SPH framework for supercooled large droplets dynamics

A multiphase SPH framework for supercooled large droplets dynamics

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