Modelling aircraft fuel jettison using smoothed particle hydrodynamics on finite-volume meshes

Jamie O Macleod, Thomas C S Rendall*, Christian B Allen

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

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Weakly compressible smoothed particle hydrodynamics (WCSPH) is used to investigate aircraft fuel jettison using a single phase model. Fuel simulations are coupled to the aircraft CFD flowfield using cell containment checks on the finite-volume mesh to locate any SPH particle within the mesh, after which the local flow velocity vector is retrieved and then used to apply an approximate aerodynamic force to the SPH particle based on a continuum correction
to discrete droplet calculations. Further downstream the SPH simulation may be continued, or a switch made to implicit particle tracking (IPT) in order to accelerate the simulation. Comparison to IPT results shows that a fluid model of the initial continuum breakup of the jet is required, but following this transition to IPT is reasonable to reduce computation time. Models are validated against volume of fluid (VOF) simulations, with runtime of the proposed model being approximately 100 times less than the VOF, and good qualitative agreement also
found compared to recorded flight results.
Original languageEnglish
Pages (from-to)1-18
Number of pages18
JournalJournal of Aircraft
Early online date13 Feb 2024
Publication statusE-pub ahead of print - 13 Feb 2024


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