Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/105900
Author(s): F. J. N.Direito
J. B. L. M. Campos
J. M. Miranda
Title: Rising of a single Taylor drop in a stagnant liquid-2D laminar flow and axisymmetry limits
Issue Date: 2016
Abstract: A numerical (computational fluid dynamics (CFD)) study concerning the rise of individual liquid Taylor drops through vertical columns of stagnant heavier liquids is presented in this paper. CFD simulations were performed in Ansys Fluent, using its implementation of volume of fluid method, assuming the flow to be axisymmetric and laminar. Different physical conditions were tested, corresponding to different combinations of relevant dimensionless parameters and the numerical method was validated through experimental data available in the literature. The viscosity ratio between the lighter and the heavier liquid was within the range 0.01-40 and Eotvos number was between 8 and 30. Morton number was within the interval of 2.32 x 10(-6)-100. Froude number results were compared to data from a literature correlation. The accordance is acceptable for the ranges studied. Velocity profiles in significant regions are reported (drop nose, drop bottom and continuous phase liquid film). The influence of changing one dimensionless parameter alone was assessed. For small and large viscosity ratios, axisymmetric behavior is not a valid assumption.
URI: https://hdl.handle.net/10216/105900
Related Information: info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Incentivo/Incentivo/EME/UI0532/2014/Incentivo/EME/UI0532/2014/UI0532
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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