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Numerical simulation of flashing jets atomisation using a unified approach
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Lyras, Konstantinos G., Dembele, Siaka and Wen, Jennifer X. (2019) Numerical simulation of flashing jets atomisation using a unified approach. International Journal of Multiphase Flow, 113 . pp. 45-58. doi:10.1016/j.ijmultiphaseflow.2018.12.011 ISSN 0301-9322.
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WRAP-numerical-simulation-flashing-jets-unified-approach-Wen-2019.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (2890Kb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.ijmultiphaseflow.2018....
Abstract
The physics of the atomisation of flash boiling jets is known to be extremely complex with interactions of different mechanisms at microscopic and macroscopic level. Early studies describe both the mechanical and thermodynamic effects focusing on the influence of the initial pressure and temperature on the spray characteristics. The resulting flashing jet usually emerges to the low-pressure region with a high velocity and fragments to large blobs and ligaments which break up to droplets due to both mechanical and thermodynamic effects. This present study describes a numerical approach for simulating the atomisation of flashing liquids suitable for both primary atomisation and secondary break-up using the Eulerian-Lagrangian-Spray-Atomisation model coupled with a pressure equation for the metastable jet. The proposed approach aims at describing the atomisation of superheated jets and the impact of bubble nucleation at different stages and regimes inside the channel the liquid emerges from. The changes in the regime outside the nozzle are discussed for various cases of flashing liquids providing insights for the interactions of the mechanisms that contribute to the liquid fragmentation and the spray characteristics such as the droplet size and velocity and the spray angle.
Item Type: | Journal Article | ||||||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TL Motor vehicles. Aeronautics. Astronautics |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
Library of Congress Subject Headings (LCSH): | Multiphase flow, Nozzles -- Fluid dynamics | ||||||||
Journal or Publication Title: | International Journal of Multiphase Flow | ||||||||
Publisher: | Elsevier | ||||||||
ISSN: | 0301-9322 | ||||||||
Official Date: | April 2019 | ||||||||
Dates: |
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Volume: | 113 | ||||||||
Page Range: | pp. 45-58 | ||||||||
DOI: | 10.1016/j.ijmultiphaseflow.2018.12.011 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 4 January 2019 | ||||||||
Date of first compliant Open Access: | 29 December 2019 | ||||||||
RIOXX Funder/Project Grant: |
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