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Droplet generation in ensembles of randomly corrugated ligaments
Institut Jean le Rond ∂’Alembert, Sorbonne Université and CNRS, Paris, France.
KTH, Skolan för teknikvetenskap (SCI), Teknisk mekanik, Strömningsmekanik och Teknisk Akustik. KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW.ORCID-id: 0000-0002-5983-9199
Institut Jean le Rond ∂’Alembert, Sorbonne Université and CNRS, Paris, France.
Institut Jean le Rond ∂’Alembert, Sorbonne Université and CNRS, Paris, France; Institut Universitaire de France (IUF), Paris, France.
2021 (Engelska)Ingår i: ICLASS 2021 - 15th Triennial International Conference on Liquid Atomization and Spray Systems, ILASS - Europe, Institute for Liquid Atomization and Spray Systems , 2021Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

This study focuses on a statistical description of droplet sizes, created as a result of capillary-induced breakup of ligaments. Direct numerical simulations of air-water systems are employed by solving the two-phase Navier-Stokes equations on adaptive Octree grids (http://basilisk.fr/), using the VOF methodology coupled with height-function-based curvature modeling. Breakup of individual ligaments are triggered by initial surface corrugations, the dynamics of which are deterministic. Stochasticity is introduced in the mix by conducting an ensemble of simulations of slender corrugated ligaments, each realization corresponding to a random but unique initial configuration. Probability density functions of the droplet sizes are computed for different ensemble sizes. These results (fig. 1) combining the effects of stochasticity with the capillarity-driven nonlinear dynamics are compared to the predictions of a Gaussian random process theory for near-monochromatic waves, which facilitate our understanding of the nature of drop size distributions encountered in realistic and convoluted fluid fragmentation scenarios.

Ort, förlag, år, upplaga, sidor
ILASS - Europe, Institute for Liquid Atomization and Spray Systems , 2021.
Nyckelord [en]
atomization, DNS of air-water systems, drop size distributions, Gamma distribution, ligaments
Nationell ämneskategori
Beräkningsmatematik Sannolikhetsteori och statistik
Identifikatorer
URN: urn:nbn:se:kth:diva-342091Scopus ID: 2-s2.0-85180760548OAI: oai:DiVA.org:kth-342091DiVA, id: diva2:1826293
Konferens
15th Triennial International Conference on Liquid Atomization and Spray Systems, ICLASS 2021, Edinburgh, United Kingdom of Great Britain and Northern Ireland, Aug 29 2021 - Sep 2 2021
Anmärkning

QC 20240111

Tillgänglig från: 2024-01-11 Skapad: 2024-01-11 Senast uppdaterad: 2024-01-11Bibliografiskt granskad

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Crialesi-Esposito, Marco

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Strömningsmekanik och Teknisk AkustikLinné Flow Center, FLOW
BeräkningsmatematikSannolikhetsteori och statistik

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