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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Kumar, Satish
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2024MAX Phase Ti<sub>2</sub>AlN for HfO<sub>2</sub> Memristors with Ultra‐Low Reset Current Density and Large On/Off Ratiocitations
- 2024Multi-Objective Optimization of Friction Stir Processing Tool with Composite Material Parameters
- 2023Photochemically Induced Marangoni Patterning of Polymer Bilayers
- 2023Wear performance analysis of B<sub>4</sub>C and graphene particles reinforced Al–Cu alloy based composites using Taguchi methodcitations
- 2023Evolution of flow reversal and flow heterogeneities in high elasticity wormlike micelles (WLMs) with a yield stresscitations
- 2022SURFACE EROSION PERFORMANCE OF YTTRIUM OXIDE BLENDED WC-12CO THERMALLY SPRAYED COATING FOR MILD STEELcitations
- 2022Controlling Surface Deformation and Feature Aspect Ratio in Photochemically Induced Marangoni Patterning of Polymer Filmscitations
- 2021Criteria Governing Rod Formation and Growth in Nonionic Polymer Micellescitations
- 2021Achieving Stable Patterns in Multicomponent Polymer Thin Films Using Marangoni and van der Waals Forcescitations
- 2021Study on Solid Particle Erosion of Pump Materials by Fly Ash Slurry using Taguchi’s Orthogonal Arraycitations
- 2020Self-aligned capillarity-assisted printing of high aspect ratio flexible metal conductorscitations
- 2019Dynamic wetting failure in curtain coatingcitations
- 2017Droplet wetting transitions on inclined substrates in the presence of external shear and substrate permeabilitycitations
- 2016Dynamic wetting failure and hydrodynamic assist in curtain coatingcitations
- 2015Combined thermal and electrohydrodynamic patterning of thin liquid filmscitations
- 2011Highly conducting and flexible few-walled carbon nanotube thin filmcitations
- 2010Meltblown fiberscitations
- 2010Transient growth without inertiacitations
- 2010Transient response of velocity fluctuations in inertialess channel flows of viscoelastic fluids
- 2004Instability of viscoelastic plane Couette flow past a deformable wallcitations
- 2000Shear banding and secondary flow in viscoelastic fluids between a cone and platecitations
Places of action
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article
Shear banding and secondary flow in viscoelastic fluids between a cone and plate
Abstract
<p>When subject to flow, entangled polymer melts and wormlike micellar solutions can form adjacent regions having a shear-rate discontinuity at their interface. This phenomenon is known as shear banding, and has recently been observed using NMR microscopy. However, the mechanisms involved in the banding process are not well understood. One important mechanism may involve secondary flow, and in this work we study the effects of shear banding on secondary flow in viscoelastic fluids between a cone and plate. We model each band as an Oldroyd-B fluid and apply regular perturbation theory assuming that the cone angle is small. Flows with both two and three bands are considered, and we study the effects of elasticity and viscosity contrast between the bands. Elasticity contrast is found to mainly affect the strength of the secondary flow, and can even cause its direction of circulation to reverse. Viscosity contrast is found to localize the secondary flow in the less viscous band, in addition to affecting its strength. These results may help explain why the experimentally observed shear banded structure is relatively stable. They also suggest an interesting mechanism for the formation of cusps at free surfaces.</p>