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Title: Development of a hybrid multi-scale simulation approach for spray processes
Authors: Zhou, L
Xia, J
Shinjo, J
Cairns, A
Cruff, L
Blaxill, H
Keywords: Multi-scale approach;Coupled level-set and volume-of-fluid method;Point particle;Spray atomisation
Issue Date: 2015
Publisher: SAGE Publications
Citation: Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2015
Abstract: This paper presents a multi-scale approach coupling a Eulerian interface-tracking method and a Lagrangian particle-tracking method to simulate liquid atomisation processes. This method aims to represent the complete spray atomisation process including the primary break-up process and the secondary break-up process, paving the way for high-fidelity simulations of spray atomisation in the dense spray zone and spray combustion in the dilute spray zone. The Eulerian method is based on the coupled level-set and volume-of-fluid method for interface tracking, which can accurately simulate the primary break-up process. For the coupling approach, the Eulerian method describes only large droplet and ligament structures, while small-scale droplet structures are removed from the resolved Eulerian description and transformed into Lagrangian point-source spherical droplets. The Lagrangian method is thus used to track smaller droplets. In this study, two-dimensional simulations of liquid jet atomisation are performed. We analysed Lagrangian droplet formation and motion using the multi-scale approach. The results indicate that the coupling method successfully achieves multi-scale simulations and accurately models droplet motion after the Eulerian–Lagrangian transition. Finally, the reverse Lagrangian–Eulerian transition is also considered to cope with interactions between Eulerian droplets and Lagrangian droplets.
ISSN: 0954-4070
Appears in Collections:Dept of Mechanical Aerospace and Civil Engineering Research Papers

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