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Atomization and Sprays

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ISSN Print: 1044-5110
ISSN Online: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2015011771
pages 857-869

THEORETICAL MODELING OF SPRAY DROP DEFORMATION AND BREAKUP IN THE MULTIMODE BREAKUP REGIME

Chen Wang
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
Shinan Chang
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
H. Wu
Institute of Engineering and Energy Technologies, School of Engineering and Computing, University of the West of Scotland, Paisley, PA1 2BE, UK
L. Ding
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
J. M. Thompson
Institute of Engineering and Energy Technologies, School of Engineering and Computing, University of the West of Scotland, Paisley, PA1 2BE, UK

ABSTRACT

Drop multimode breakup is more complex than the bag and shear breakup regimes, and modeling drop breakup in the multimode breakup regime is less reported. In this article, a theoretical model is developed to predict the drop breakup properties in the multimode regime in a more accurate manner. In the present model, the process of the drop deformation and breakup are regarded as the movement of the center of the mass along the cross-stream and streamwise directions, respectively. The displacement of the center of the mass is obtained by solving a pressure balance equation and a mechanical analog model equation. Drop breakup occurs when the displacement of the mass center is out of the scale defined by the threshold function of Weber number. The characteristics of the proposed model as well as the breakup properties of the drops in the multimode regime are addressed by comparing the predicted results with the experimental data in the open published literature.