Contraction of a shear-thinning axisymmetric cavity
| Autor: | Jiakai Lu, Michele Ferri, Osvaldo H. Campanella, Carlos Corvalan, Sebastian Ubal |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Fabrication
Capillary action Computational Mechanics Rotational symmetry Physics::Optics Collapse (topology) 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics FINITE ELEMENTS 0103 physical sciences 010306 general physics Scaling Fluid Flow and Transfer Processes Physics Shear thinning BUBBLES Mechanical Engineering Front (oceanography) Mechanics INTERFACIAL FLOWS Condensed Matter Physics NON-NEWTONIAN FLUIDS Condensed Matter::Soft Condensed Matter Nanopore purl.org/becyt/ford/2.4 [https] purl.org/becyt/ford/2 [https] Mechanics of Materials |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| Popis: | We investigate the capillary driven collapse of a small contracting cavity or hole in a shear-thinning fluid. We find that shear-thinning effects accelerate the collapse of the cavity by decreasing the apparent liquid viscosity near the cavity’s moving front. Scaling arguments are used to derive a power-law relationship between the size of the cavity and the rate of collapse. The scaling predictions are then corroborated and fully characterized using high-fidelity simulations. The new findings have implications for natural and technological systems including neck collapse during microbubble pinch-off, the integrity of perforated films and biological membranes, the stability of bubbles and foams in the food industry, and the fabrication of nanopore based biosensors.We investigate the capillary driven collapse of a small contracting cavity or hole in a shear-thinning fluid. We find that shear-thinning effects accelerate the collapse of the cavity by decreasing the apparent liquid viscosity near the cavity’s moving front. Scaling arguments are used to derive a power-law relationship between the size of the cavity and the rate of collapse. The scaling predictions are then corroborated and fully characterized using high-fidelity simulations. The new findings have implications for natural and technological systems including neck collapse during microbubble pinch-off, the integrity of perforated films and biological membranes, the stability of bubbles and foams in the food industry, and the fabrication of nanopore based biosensors. |
| Databáze: | OpenAIRE |
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