Abstract
In this research we investigated the spreading of polyisobutylene solutions in polybutene on glass surfaces by measuring contact line speed as a function of dynamic contact angle. Polymer concentration was less than twice the coil overlap concentration (2c*). The contact line motion of polymer solutions was qualitatively similar to that of Newtonian liquid in that it followed the Tanner-Voinov-Hoffman relation. However the contact line speed was strongly affected by the migration of polymer molecules away from the wall due to the hydrodynamic interaction between the polymer and the wall at the contact line region. The hydrodynamic interaction is caused by the elasticity of polymer molecules in the shear flow. However, the elasticity of the polymer solution did not directly affect the bulk motion strongly since the Deborah number of the bulk motion was less than 0.1. The present result can be used in the derivation of the boundary condition for solving free surface flows of viscoelastic fluid on a solid surface.
| Original language | English |
|---|---|
| Pages (from-to) | 120-130 |
| Number of pages | 11 |
| Journal | Journal of Non-Newtonian Fluid Mechanics |
| Volume | 202 |
| DOIs | |
| Publication status | Published - 2013 Dec 1 |
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Keywords
- Boger fluid
- Contact line
- Depletion layer
- Migration
- TVH relation
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanical Engineering
- Chemical Engineering(all)
- Materials Science(all)
- Applied Mathematics
Cite this
Spreading of Boger fluid on horizontal surface. / Han, Jeongin; Kim, Chongyoup.
In: Journal of Non-Newtonian Fluid Mechanics, Vol. 202, 01.12.2013, p. 120-130.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Spreading of Boger fluid on horizontal surface
AU - Han, Jeongin
AU - Kim, Chongyoup
PY - 2013/12/1
Y1 - 2013/12/1
N2 - In this research we investigated the spreading of polyisobutylene solutions in polybutene on glass surfaces by measuring contact line speed as a function of dynamic contact angle. Polymer concentration was less than twice the coil overlap concentration (2c*). The contact line motion of polymer solutions was qualitatively similar to that of Newtonian liquid in that it followed the Tanner-Voinov-Hoffman relation. However the contact line speed was strongly affected by the migration of polymer molecules away from the wall due to the hydrodynamic interaction between the polymer and the wall at the contact line region. The hydrodynamic interaction is caused by the elasticity of polymer molecules in the shear flow. However, the elasticity of the polymer solution did not directly affect the bulk motion strongly since the Deborah number of the bulk motion was less than 0.1. The present result can be used in the derivation of the boundary condition for solving free surface flows of viscoelastic fluid on a solid surface.
AB - In this research we investigated the spreading of polyisobutylene solutions in polybutene on glass surfaces by measuring contact line speed as a function of dynamic contact angle. Polymer concentration was less than twice the coil overlap concentration (2c*). The contact line motion of polymer solutions was qualitatively similar to that of Newtonian liquid in that it followed the Tanner-Voinov-Hoffman relation. However the contact line speed was strongly affected by the migration of polymer molecules away from the wall due to the hydrodynamic interaction between the polymer and the wall at the contact line region. The hydrodynamic interaction is caused by the elasticity of polymer molecules in the shear flow. However, the elasticity of the polymer solution did not directly affect the bulk motion strongly since the Deborah number of the bulk motion was less than 0.1. The present result can be used in the derivation of the boundary condition for solving free surface flows of viscoelastic fluid on a solid surface.
KW - Boger fluid
KW - Contact line
KW - Depletion layer
KW - Migration
KW - TVH relation
UR - http://www.scopus.com/inward/record.url?scp=84887245997&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84887245997&partnerID=8YFLogxK
U2 - 10.1016/j.jnnfm.2013.10.002
DO - 10.1016/j.jnnfm.2013.10.002
M3 - Article
AN - SCOPUS:84887245997
VL - 202
SP - 120
EP - 130
JO - Journal of Non-Newtonian Fluid Mechanics
JF - Journal of Non-Newtonian Fluid Mechanics
SN - 0377-0257
ER -