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Hybrid treatment of atomized droplets

Abstract : Atomization of liquid fuel has a direct impact on the production of pollutant emission in engineering propulsion devices. Due to the multiple challenges in experimental investigations, motivation for numerical study is increasing on liquid-gas interaction from injection till dispersed spray zone. Our purpose is to increase the accuracy of the treatment of droplets in atomized jet, which are typically 100 times smaller than the characteristic injection length size. As the characteristic length reduces downstream to the jet, it is increasingly challenging to track the interface of the droplets accurately. To solve this multiscale issue, a coupled tracking Eulerian-Lagrangian Method exists [1]. It consists in transforming the small droplets to Lagrangian droplets that are transported with drag models. In addition to the size transformation criteria, one can consider geometric parameters to determine if a droplet has to be transformed. Indeed, the geometric criteria are there for two reasons. The first one is the case where the droplets can break if there are not spherical. The second one is about the drag models that are based on the assumption that the droplet is spherical.
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https://hal.archives-ouvertes.fr/hal-02144607
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Submitted on : Friday, May 31, 2019 - 8:20:28 AM
Last modification on : Wednesday, November 3, 2021 - 5:36:52 AM

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  • HAL Id : hal-02144607, version 1

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Victor Cheron, Jorge César Brändle de Motta, T. Menard, A. Berlemont. Hybrid treatment of atomized droplets. 12th European Fluid Mechanics Conference, Sep 2018, Vienna, Austria. ⟨hal-02144607⟩

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