dorsal/arxiv
View SchemaAnnular electroconvection with shear
| Authors | Zahir A. Daya, V. B. Deyirmenjian, Stephen W. Morris, John R. de Bruyn |
|---|---|
| Categories | |
| ArXiv ID | patt-sol/9710005 |
| URL | https://arxiv.org/abs/patt-sol/9710005 |
| DOI | 10.1103/PhysRevLett.80.964 |
| Journal | Physical Review Letters, vol 80, p. 964 (1998). |
Abstract
We report experiments on convection driven by a radial electrical force in suspended annular smectic A liquid crystal films. In the absence of an externally imposed azimuthal shear, a stationary one-dimensional (1D) pattern consisting of symmetric vortex pairs is formed via a supercritical transition at the onset of convection. Shearing reduces the symmetries of the base state and produces a traveling 1D pattern whose basic periodic unit is a pair of asymmetric vortices. For a sufficiently large shear, the primary bifurcation changes from supercritical to subcritical. We describe measurements of the resulting hysteresis as a function of the shear at radius ratio $\eta \sim 0.8$. This simple pattern forming system has an unusual combination of symmetries and control parameters and should be amenable to quantitative theoretical analysis.
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"abstract": "We report experiments on convection driven by a radial electrical force in\nsuspended annular smectic A liquid crystal films. In the absence of an\nexternally imposed azimuthal shear, a stationary one-dimensional (1D) pattern\nconsisting of symmetric vortex pairs is formed via a supercritical transition\nat the onset of convection. Shearing reduces the symmetries of the base state\nand produces a traveling 1D pattern whose basic periodic unit is a pair of\nasymmetric vortices. For a sufficiently large shear, the primary bifurcation\nchanges from supercritical to subcritical. We describe measurements of the\nresulting hysteresis as a function of the shear at radius ratio $\\eta \\sim\n0.8$. This simple pattern forming system has an unusual combination of\nsymmetries and control parameters and should be amenable to quantitative\ntheoretical analysis.",
"arxiv_id": "patt-sol/9710005",
"authors": [
"Zahir A. Daya",
"V. B. Deyirmenjian",
"Stephen W. Morris",
"John R. de Bruyn"
],
"categories": [
"patt-sol",
"cond-mat.soft",
"nlin.PS",
"physics.flu-dyn"
],
"doi": "10.1103/PhysRevLett.80.964",
"journal_ref": "Physical Review Letters, vol 80, p. 964 (1998).",
"title": "Annular electroconvection with shear",
"url": "https://arxiv.org/abs/patt-sol/9710005"
},
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