Thermally induced hydrodynamic fluctuations below the onset of electroconvection

Measurements of the correlation function below the electrohydrodynamic instability in a thin layer of a nematic liquid crystal reveal fluctuating convection patches. Their amplitude {ital {bar A}}, correlation length {xi}, and correlation time {tau} can be desribed by a stochastic mean-field model....

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Veröffentlicht in:	Physical review letters 1991-07, Vol.67 (5), p.596-599
Hauptverfasser:	REHBERG, I, DE LA TORRE JUAREZ, R. M, SMCHOPF, W, HORNER, F, AHLERS, G, BRAND, H. R
Format:	Artikel
Sprache:	eng
Schlagworte:	656002 > Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-) AMINES ANILINE AROMATICS CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY CONVECTION CORRELATION FUNCTIONS CRYSTALS ELECTROHYDRODYNAMICS ENERGY TRANSFER Exact sciences and technology FLUCTUATIONS Fluid dynamics FLUID MECHANICS FLUIDS FUNCTIONS Fundamental areas of phenomenology (including applications) HEAT TRANSFER Hydrodynamic stability HYDRODYNAMICS LAYERS LIQUID CRYSTALS LIQUIDS MASS TRANSFER MEAN-FIELD THEORY MECHANICS ORGANIC COMPOUNDS Physics VARIATIONS 640440 > Fluid Physics-- Electrohydrodynamics
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Beschreibung
Zusammenfassung:	Measurements of the correlation function below the electrohydrodynamic instability in a thin layer of a nematic liquid crystal reveal fluctuating convection patches. Their amplitude {ital {bar A}}, correlation length {xi}, and correlation time {tau} can be desribed by a stochastic mean-field model. The amplitude agrees with the expected fluctuations due to thermal noise.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/physrevlett.67.596