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Updated: May 18, 2026
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Magnetically Induced Rotating Rayleigh-Taylor Instability
Published on: March 3, 2017
Taylor-Couette instability in anisotropic clay suspensions measured using small-angle X-ray scattering
A M Philippe1, C Baravian, M Jenny
1Laboratoire d'Énergétique et de Mécanique Théorique et Appliquée, Université de Lorraine - CNRS, UMR 7563, 2 Avenue de la Forêt de Haye, BP160, 54504 Vandoeuvre Lès Nancy Cedex, France. adrian-marie.philippe@ensem.inpl-nancy.fr
Physical Review Letters
|September 26, 2012
Summary
This study introduces a new method to observe Taylor-Couette instability in non-Newtonian fluids. Results show that fluid anisotropy, not just shear-thinning, significantly impacts instability and vortex formation.
Area of Science:
- Fluid Dynamics
- Rheology
- Materials Science
Background:
- Taylor-Couette instability is crucial in fluid mechanics.
- Non-Newtonian fluids exhibit complex behaviors like shear-thinning and anisotropy.
- Understanding these instabilities is key for industrial processes.
Purpose of the Study:
- To develop a novel experimental method for characterizing Taylor-Couette instability.
- To investigate the interplay between shear-thinning, anisotropy, and instability in clay suspensions.
- To determine the morphology of vortices in non-Newtonian Couette flow.
Main Methods:
- Synchrotron-based rheological small-angle X-ray scattering (SAXS) experiments.
- Investigation of natural swelling clays suspensions.
- Linear stability analysis for power-law fluids.
Main Results:
- A novel method to characterize Taylor-Couette instability onset and morphology.
- Experimental and numerical evidence of a destabilizing effect.
- Vortex morphology depends on the fluid index.
- Anisotropy significantly impacts Taylor-Couette instability, beyond shear-thinning effects.
Conclusions:
- The study provides a new experimental approach for studying fluid instabilities.
- Medium anisotropy plays a critical role in Taylor-Couette instability in these systems.
- Findings advance the understanding of complex fluid behavior in rotational flows.
