Abstract
In this paper, a numerical solution for viscoelastic drop formation from a nozzle into an ambient gas is presented. A volume of fluid (VOF) method is used to predict the formation and break-up process of viscoelastic drop. Here, Giesekus model is used as the constitutive equation. The major features of the phenomenon, such as instantaneous drop length, limiting length of a drop at breakup, minimum drop radius and the volume of the primary drop is determined for a range of the parameter space spanned by the appropriate dimensionless groups. The results reveal that enhancing the mobility factor, Wiessenberg number, and viscosity ratio causes a noticeable decrease in limiting drop length and a small decrease on the primary drop volume. Also, the increasing of gravitational bond number and capillary number causes the limiting drop length increases while the primary drop volume is reduced.
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Komeili Birjandi, A., Norouzi, M. & Kayhani, M.H. A numerical study on drop formation of viscoelastic liquids using a nonlinear constitutive equation. Meccanica 52, 3593–3613 (2017). https://doi.org/10.1007/s11012-017-0669-2
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DOI: https://doi.org/10.1007/s11012-017-0669-2