Publicou 12 edições por ano
ISSN Imprimir: 1044-5110
ISSN On-line: 1936-2684
Indexed in
CRITERION BETWEEN PERMANENT COALESCENCE AND SEPARATION FOR HEAD-ON BINARY DROPLET COLLISION
RESUMO
Criterion between permanent coalescence and separation in head-on binary droplet collision is investigated experimentally and numerically. Colliding droplets are transformed into a torus-like disk that contracts to form an elongated droplet having rounded ends and a slim connecting neck. The results of numerical simulation are in good agreement with experimental results. The surface energy at the maximum elongation indicates the criterion for the separation only in the collision of equal-sized droplets. The nondimensional axial length at the criterion between permanent coalescence and separation is independent of the radius ratio of the droplets. The separation mechanism is discussed based on the fluid flows at the maximum elongation. In separation collision, the pressure at the connecting neck of the elongated droplet rises because the connecting neck of the droplet becomes slender. While the length of the elongated droplet decreases after the maximum elongation, the fluid flow stretching the connecting neck leads to the separation.
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Munnannur Achuth, Reitz Rolf D., A new predictive model for fragmenting and non-fragmenting binary droplet collisions, International Journal of Multiphase Flow, 33, 8, 2007. Crossref
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Saroka Mary D., Ashgriz Nasser, Separation Criteria for Off-Axis Binary Drop Collisions, Journal of Fluids, 2015, 2015. Crossref
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Merdasi Arshia, Ebrahimi Saman, Moosavi Ali, Shafii Mohammad Behshad, Kowsary Farshad, Numerical simulation of collision between two droplets in the T-shaped microchannel with lattice Boltzmann method, AIP Advances, 6, 11, 2016. Crossref