Thixotropy and shear thinning of lubricated contacts with confined membranes
| Autor: | Thomas Le Goff, Tung B.T. To, Olivier Pierre-Louis |
|---|---|
| Přispěvatelé: | Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2017 |
| Předmět: |
Thixotropy
Materials science Biophysics 02 engineering and technology 01 natural sciences Quantitative Biology::Cell Behavior Quantitative Biology::Subcellular Processes Physics::Fluid Dynamics [SPI]Engineering Sciences [physics] Rheology 0103 physical sciences Membrane dynamics [CHIM]Chemical Sciences General Materials Science 010306 general physics Nonlinear evolution [PHYS]Physics [physics] Shear thinning Surfaces and Interfaces General Chemistry Mechanics 021001 nanoscience & nanotechnology Condensed Matter::Soft Condensed Matter Nonlinear system Membrane Shear (geology) 0210 nano-technology Biotechnology |
| Zdroj: | European Physical Journal E: Soft matter and biological physics European Physical Journal E: Soft matter and biological physics, EDP Sciences: EPJ, 2017, 40, pp.44-44. ⟨10.1140/epje/i2017-11532-6⟩ |
| ISSN: | 1292-895X 1292-8941 |
| DOI: | 10.1140/epje/i2017-11532-6 |
| Popis: | We have modeled the nonlinear dynamics and the rheological behavior of a system under shear containing a membrane confined between two attractive walls. The presence of the membrane induces additional tangential forces on the walls that always increase the global friction. At low shear rates, the membrane exhibits chaotic dynamics with slow coarsening leading to thixotropy, i.e. to a slow decrease of the membrane-induced tangential forces on the walls. At intermediate shear rates, the membrane profile presents stationary periodic patterns. At higher shear rates, membrane dynamics are governed by a nonlinear evolution equation which is similar to the Kuramoto-Sivashinski equation, but with a sixth-order stabilizing term. The membrane experiences chaotic dynamics without coarsening. As a consequence of the nonlinear dynamics of the membrane at intermediate and large shear rates, the system exhibits shear thinning. |
| Databáze: | OpenAIRE |
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