Rising of a single Taylor drop in a stagnant liquid-2D laminar flow and axisymmetry limits

• Type: Article in International Scientific Journal
• Date: 2016

Authors

F. J. N.Direito (Author) FEUP; J. B. L. M. Campos (Author) FEUP; J. M. Miranda (Author) FEUP

Journal

Title: Physics of Fluids

Vol. 28 No. 5

Pages: 057101-1-057101-20

ISSN: 1070-6631

Publisher: American Institute of Physics

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 6 Citations

INSPEC

Associated Projects

UI0532 - Incentivo/EME/UI0532/2014

Other information

Authenticus ID: P-00K-FW8

DOI: 10.1063/1.4947426

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 20