Abstract
| Original language | English |
|---|---|
| Article number | 87 |
| Number of pages | 11 |
| Journal | Microfluidics and Nanofluidics |
| Volume | 23 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1 Jul 2019 |
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Keywords
- Film drainage
- Head-on collision
- Numerical simulation
- Viscoelastic fluid
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Head-on collision of Newtonian drops in a viscoelastic medium. / Mitrias, Christos; Jaensson, N.O.; Hulsen, Martien; Anderson, Patrick (Corresponding author).
In: Microfluidics and Nanofluidics, Vol. 23, No. 7, 87, 01.07.2019.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Head-on collision of Newtonian drops in a viscoelastic medium
AU - Mitrias, Christos
AU - Jaensson, N.O.
AU - Hulsen, Martien
AU - Anderson, Patrick
PY - 2019/7/1
Y1 - 2019/7/1
N2 - Depending on the application one needs to either stabilize or destabilize the interfacial properties of an emulsion. An aspect of the dynamics that governs the stability of emulsions in general is the drainage time of the film that is formed when two drops collide. In this work, we study the effect that viscoelasticity of the matrix fluid has on this drainage time of two Newtonian drops that perform a head-on collision under an applied macroscopic extensional rate. For the modeling of the viscoelastic matrix material the Giesekus model is chosen. A cylindrical coordinate system is applied with imposed axisymmetry and the resulting equations are solved using fully resolved numerical simulations employing a finite element discretization. Our results show that viscoelasticity reduces the drainage time, which is a combined effect of three different stages.
AB - Depending on the application one needs to either stabilize or destabilize the interfacial properties of an emulsion. An aspect of the dynamics that governs the stability of emulsions in general is the drainage time of the film that is formed when two drops collide. In this work, we study the effect that viscoelasticity of the matrix fluid has on this drainage time of two Newtonian drops that perform a head-on collision under an applied macroscopic extensional rate. For the modeling of the viscoelastic matrix material the Giesekus model is chosen. A cylindrical coordinate system is applied with imposed axisymmetry and the resulting equations are solved using fully resolved numerical simulations employing a finite element discretization. Our results show that viscoelasticity reduces the drainage time, which is a combined effect of three different stages.
KW - Film drainage
KW - Head-on collision
KW - Numerical simulation
KW - Viscoelastic fluid
UR - http://www.scopus.com/inward/record.url?scp=85067025574&partnerID=8YFLogxK
U2 - 10.1007/s10404-019-2254-6
DO - 10.1007/s10404-019-2254-6
M3 - Article
VL - 23
JO - Microfluidics and Nanofluidics
JF - Microfluidics and Nanofluidics
SN - 1613-4982
IS - 7
M1 - 87
ER -