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• W2550072733 abstract "Liquid jet atomization in cross-flowing gas is a critical phenomenon in the fuel preparation process and controls combustor efficiency and emissions. Quantitative experimental studies of atomization have been rare due to limited optical access to the near-field dense spray region. High fidelity multiphase flow simulation has shown promise as an alternative approach for scrutinizing the complex physics involved. Computationally, it remains challenging to resolve the wide range of spatial and temporal scales involved and to properly account for the large variation of density across the liquid-gas interface. In this work, the Coupled Level Set and Volume Of Fluid (CLSVOF) approach is used to directly capture liquid-gas interface involving topological changes. The ghost fluid method is used to facilitate simulations at realistic fuel-air density ratio. Adaptive Mesh Refinement (AMR) and Lagrangian droplet models are used to efficiently resolve the multiple scales simultaneously. High performance computing is leveraged to manage the cost of the high resolution simulations which were performed using over 2000 processors at the Oakridge Leadership Computing Facility of the US Department of Energy. The equivalence between uniform resolution and AMR-based simulations is established by comparing surface instability and breakup. The significant cost advantages of using AMR are documented. The detailed simulation results at different Weber numbers are validated with experimental measurements of surface wavelength, breakup location and column trajectory. The size, velocity and mass rate of droplets formed along jet column are studied and also compared with experimental measurements. The effects of increasing Weber number on jet breakup and aerodynamic flow are discussed." @default.
• W2550072733 created "2016-11-30" @default.
• W2550072733 creator A5050474668 @default.
• W2550072733 creator A5083912070 @default.
• W2550072733 date "2014-01-01" @default.
• W2550072733 modified "2023-09-24" @default.
• W2550072733 title "High-fidelity Simulation of High Density-Ratio Liquid Jet Atomization in Crossflow with Experimental Validation" @default.
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• W2550072733 hasPublicationYear "2014" @default.
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