Droplet Deformation Between Two Moving Parallel Plates

Document Type : Research Article

Authors

1 Polymer Engineering Department, Sahand University of Technology

2 sahand university student

3 faculty member

4 Leibniz Institute for Polymer Research, Dresden University of Technology

Abstract

One of the most important and challenging subjects for scientists is the numerical simulation of the transport phenomena in heterogeneous media. The discontinuity in the properties causes computational errors leading to incorrect estimation of the exact values. The extended finite element method is one of the powerful tools to predict the behavior of heterogenic materials and phenomena. In the present study, we attempted to adapt the extended finite element method to study the flow of a two phase system and investigate the effect of different material and operational parameters such as Capillary number on the drop deformation process in Newtonian/Newtonian and non-Newtonian/ Newtonian systems. The results showed a good agreement with the experimental ones and complete compliance with other methods in benchmark studies. The results indicated that increasing the initial radius of the droplet would increase the steady-state deformation parameter. Moreover, it was shown that increasing viscosity ratio suppressed the droplet deformation. The effect of non-Newtonian fluid behavior was also investigated for a Carreau fluid. Furthermore, the distribution of shear rate around the droplet was discussed.

Keywords

Main Subjects


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