The work of adhesion of polymer/wall interfaces and its association with the onset of wall slip

1998 ◽  
Vol 42 (4) ◽  
pp. 795-812 ◽  
Author(s):  
Spiros H. Anastasiadis ◽  
Savvas G. Hatzikiriakos
Keyword(s):  
Wall Slip ◽  
Work Of Adhesion ◽  
Polymer Wall

scholarly journals Polymer wall slip modelling

2014 ◽  
Vol 5 (3(19)) ◽  
pp. 8 ◽  
Author(s):  
Игорь Игоревич Ивицкий
Keyword(s):  
Wall Slip ◽  
Polymer Wall

Cyclic generation of wall slip at the exit of plane Couette flow

2003 ◽  
Vol 47 (3) ◽  
pp. 737-757 ◽  
Author(s):  
Hiroshi Mizunuma ◽  
Hideyuki Takagi
Keyword(s):  
Couette Flow ◽  
Wall Slip ◽  
Plane Couette Flow

scholarly journals Effect of wall-slip on natural convection in a square cavity

2021 ◽  
Vol 1132 (1) ◽  
pp. 012040
Author(s):  
Kartik Suresh ◽  
C K Arjun ◽  
Damu Murali ◽  
S Ajith Kumar
Keyword(s):  
Natural Convection ◽  
Wall Slip ◽  
Square Cavity

scholarly journals Wall slip of complex fluids: Interfacial friction versus slip length

2018 ◽  
Vol 3 (6) ◽  
Author(s):  
Benjamin Cross ◽  
Chloé Barraud ◽  
Cyril Picard ◽  
Liliane Léger ◽  
Frédéric Restagno ◽  
...  
Keyword(s):  
Slip Length ◽  
Complex Fluids ◽  
Wall Slip ◽  
Interfacial Friction

scholarly journals Quantification of shear viscosity and wall slip velocity of highly concentrated suspensions with non-Newtonian matrices in pressure driven flows

2021 ◽  
Author(s):  
Patrick Wilms ◽  
Jan Wieringa ◽  
Theo Blijdenstein ◽  
Kees van Malssen ◽  
Reinhard Kohlus
Keyword(s):  
Shear Stress ◽  
Liquid Phase ◽  
Shear Rate ◽  
Shear Viscosity ◽  
Slip Velocity ◽  
Volume Fraction ◽  
Solid Volume Fraction ◽  
Wall Slip ◽  
Flow Index ◽  
Concentrated Suspensions

AbstractThe rheological characterization of concentrated suspensions is complicated by the heterogeneous nature of their flow. In this contribution, the shear viscosity and wall slip velocity are quantified for highly concentrated suspensions (solid volume fractions of 0.55–0.60, D4,3 ~ 5 µm). The shear viscosity was determined using a high-pressure capillary rheometer equipped with a 3D-printed die that has a grooved surface of the internal flow channel. The wall slip velocity was then calculated from the difference between the apparent shear rates through a rough and smooth die, at identical wall shear stress. The influence of liquid phase rheology on the wall slip velocity was investigated by using different thickeners, resulting in different degrees of shear rate dependency, i.e. the flow indices varied between 0.20 and 1.00. The wall slip velocity scaled with the flow index of the liquid phase at a solid volume fraction of 0.60 and showed increasingly large deviations with decreasing solid volume fraction. It is hypothesized that these deviations are related to shear-induced migration of solids and macromolecules due to the large shear stress and shear rate gradients.

Moldability improvement in microinjection molding via film lamination

2021 ◽  
pp. 096739112098650
Author(s):  
Dah Hee Kim ◽  
Young Seok Song
Keyword(s):  
Heat Transfer ◽  
Light Guide ◽  
Wall Slip ◽  
Skin Layer ◽  
Pattern Transfer ◽  
Plastic Plate ◽  
Resin Infusion ◽  
Microinjection Molding ◽  
Insulation Effect ◽  
Thin Plastic

The purpose of this study is to integrate a polymeric film onto a mold to impede thermal heat transfer during resin infusion. A thin plastic plate was fabricated by using microinjection molding. A polyimide (PI) film was laminated onto a mold in an effort to produce a thin light guide plate (LGP). The film could decelerate the solidification of molten polymer in the cavity of mold and enhance the wall slip of resin on the mold. The insulation effect was modeled numerically. The surface roughness and pattern transfer characteristics of the LGP were evaluated. It was found that the fluidity of the resin increased due to the decreased skin layer during mold filling. The results showed that the strategy proposed in this study could help decrease the thickness of LGP effectively when manufacturing the part via injection molding.

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