dorsal/arxiv
View SchemaOscillations of a solid sphere falling through a wormlike micellar fluid
| Authors | Anandhan Jayaraman, Andrew Belmonte |
|---|---|
| Categories | |
| ArXiv ID | physics/0205067 |
| URL | https://arxiv.org/abs/physics/0205067 |
| DOI | 10.1103/PhysRevE.67.065301 |
Abstract
We present an experimental study of the motion of a solid sphere falling through a wormlike micellar fluid. While smaller or lighter spheres quickly reach a terminal velocity, larger or heavier spheres are found to oscillate in the direction of their falling motion. The onset of this instability correlates with a critical value of the velocity gradient scale $\Gamma_{c}\sim 1$ s$^{-1}$. We relate this condition to the known complex rheology of wormlike micellar fluids, and suggest that the unsteady motion of the sphere is caused by the formation and breaking of flow-induced structures.
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"abstract": "We present an experimental study of the motion of a solid sphere falling\nthrough a wormlike micellar fluid. While smaller or lighter spheres quickly\nreach a terminal velocity, larger or heavier spheres are found to oscillate in\nthe direction of their falling motion. The onset of this instability correlates\nwith a critical value of the velocity gradient scale $\\Gamma_{c}\\sim 1$\ns$^{-1}$. We relate this condition to the known complex rheology of wormlike\nmicellar fluids, and suggest that the unsteady motion of the sphere is caused\nby the formation and breaking of flow-induced structures.",
"arxiv_id": "physics/0205067",
"authors": [
"Anandhan Jayaraman",
"Andrew Belmonte"
],
"categories": [
"physics.flu-dyn",
"cond-mat.mtrl-sci",
"cond-mat.soft"
],
"doi": "10.1103/PhysRevE.67.065301",
"title": "Oscillations of a solid sphere falling through a wormlike micellar fluid",
"url": "https://arxiv.org/abs/physics/0205067"
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