Abstract
| Original language | English |
|---|---|
| Article number | 14003 |
| Number of pages | 7 |
| Journal | Europhysics letters |
| Volume | 84 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2008 |
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Keywords
- IR-87660
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Localized states in sheared electroconvection. / Tsai, Peichun Amy; Morris, Stephen W.; Daya, Zahir A.
In: Europhysics letters, Vol. 84, No. 1, 14003, 2008.Research output: Contribution to journal › Article › Academic
TY - JOUR
T1 - Localized states in sheared electroconvection
AU - Tsai, Peichun Amy
AU - Morris, Stephen W.
AU - Daya, Zahir A.
PY - 2008
Y1 - 2008
N2 - Electroconvection in a thin, sheared fluid film displays a rich sequence of bifurcations between different flow states as the driving voltage is increased. We present a numerical study of an annular film in which a radial potential difference acts on induced surface charges to drive convection. The film is also sheared by independently rotating the inner edge of the annulus. This simulation models laboratory experiments on electroconvection in sheared smectic liquid crystal films. The applied shear competes with the electrical forces, resulting in oscillatory and strongly subcritical bifurcations between localized vortex states close to onset. At higher forcing, the flow becomes chaotic via a Ruelle-Takens-Newhouse scenario. The simulation allows flow visualization not available in the physical experiments, and sheds light on previously observed transitions in the current-voltage characteristics of electroconvecting smectic films.
AB - Electroconvection in a thin, sheared fluid film displays a rich sequence of bifurcations between different flow states as the driving voltage is increased. We present a numerical study of an annular film in which a radial potential difference acts on induced surface charges to drive convection. The film is also sheared by independently rotating the inner edge of the annulus. This simulation models laboratory experiments on electroconvection in sheared smectic liquid crystal films. The applied shear competes with the electrical forces, resulting in oscillatory and strongly subcritical bifurcations between localized vortex states close to onset. At higher forcing, the flow becomes chaotic via a Ruelle-Takens-Newhouse scenario. The simulation allows flow visualization not available in the physical experiments, and sheds light on previously observed transitions in the current-voltage characteristics of electroconvecting smectic films.
KW - IR-87660
U2 - 10.1209/0295-5075/84/14003
DO - 10.1209/0295-5075/84/14003
M3 - Article
VL - 84
JO - Europhysics letters
JF - Europhysics letters
SN - 0295-5075
IS - 1
M1 - 14003
ER -