کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
671169 | 1459092 | 2009 | 14 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Influence of viscoelasticity on drop deformation and orientation in shear flow. Part 2: Dynamics Influence of viscoelasticity on drop deformation and orientation in shear flow. Part 2: Dynamics](/preview/png/671169.png)
An experimental study of drop dynamics under shear is conducted for five fluid pairs: a reference Newtonian system, two systems with a viscoelastic drop in a Newtonian matrix, one with a Newtonian drop in a viscoelastic matrix, all at drop to matrix viscosity ratio λ=1.5λ=1.5, and a separate case at λ=0.75λ=0.75. The viscoelastic liquids are either a Boger fluid or a shear-thinning viscoelastic fluid satisfying an Ellis model. Deborah numbers in the range 1–2 and a range of capillary numbers from low to above breakup conditions are addressed. The results focus on three aspects: relaxation after cessation of shear, a new viscoelastic drop breakup scenario, and the effect of shear flow history on drop breakup. Numerical simulations with the 3D volume-of-fluid PROST method complement the experimental results.
Journal: Journal of Non-Newtonian Fluid Mechanics - Volume 156, Issues 1–2, January 2009, Pages 44–57