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Authors
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Moeeni, M.A. ; Hosseini, M. S. ; Aghjeh, M.K.R. ; Mostafaiyan, M.
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Title
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Numerical study on the effect of rheological parameters on the droplet deformation process in Newtonian and non-Newtonian two-phase systems using extended finite element method
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Date
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11.06.2020
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Number
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58633
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Abstract
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In the present study, attempts were made to study the effect of rheological parameters on the drop deformation process. For this purpose, both Newtonian and non-Newtonian (Carreau-Yasuda model) were considered and extended finite element method (XFEM) along with level-set method (LSM) were used to simulate the process. The result showed that in Newtonian-Newtonian systems, there was no shear stress overshoot (maximum) during the deformation process and the shear stress increased monotonically until it reached a steady-state, whereas, it exhibited an overshoot (maximum) for non-Newtonian systems. Results also showed that the increase of the wall confinement parameter (R/H) would increase the droplet deformation monotonically for studied viscosity ratios. It was further observed that the steady-state deformation parameter (Dss) was increased as Ca increased from 0.2 to 0.8 for viscosity ratio (·) between 0.5 and 2.5.
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Publisher
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Progress in Computational Fluid Dynamics : An International Journal
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Wikidata
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Citation
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Progress in Computational Fluid Dynamics : An International Journal 20 (2020) 143-155
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DOI
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https://doi.org/10.1504/PCFD.2020.107270
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