Electroconvection and Pattern Formation

Name: Electroconvection and Pattern Formation
Brand: VDM Verlag
SKU: 9783639214802
Price: 81.42 EUR
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In Nematic Liquid Crystals

Автор: Gyanu Acharya

Език:

Корици: С меки корици

Издател: VDM Verlag

Наличност: Налично при издателя, по поръчка

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Electrohydrodynamic convection (EHC) in nematic liquid crystals is a crucial model system for the st...

Информация за книгата

Автор

Gyanu Acharya

Език

Английски език

Корици

Книга - С меки корици

Издадена

2010

страници

236

EAN

9783639214802

ISBN

3639214803

Enbook ID

06829368

Издател

VDM Verlag

Теглоt

349

Размери

152 x 229 x 14

Пълно описание

Electrohydrodynamic convection (EHC) in nematic liquid crystals is a crucial model system for the study of spontaneous, non-equilibrium pattern formation in anisotropic systems. To characterize the EHC patterns, I have utilized two nematic samples: 4-ethyl-2-fluoro-4'-[2-(trans-4-n-pentylcyclohexyl)-ethyl]-biphenyl (I52) and a mixture of 65 wt.-% p-butyl-p'-methoxy-azoxybenzene and 35 wt.-% p-ethyl-p'-methoxy-azoxybenzene (Phase 5), filled in standard planar cell. In I52, over certain range of the conductivity, the initial transition leads to two families of counter-propagating oblique modes that loose stability at onset. These experimental observations are in agreement with the standard model and weak electrolyte model of electroconvection. To study spatiotemporal chaos (STC), four-envelopes of the pattern are extracted by applying 2D spatial and 1D temporal Fourier transform. The temporal variation of the amplitudes of these envelopes is chaotic in space and time. In Phase 5, I observed oblique stationary (OS) modes at lower frequencies and normal traveling (NT) modes at higher frequencies resulting discontinuous jump in the Hopf frequency.

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Electroconvection and Pattern Formation

In Nematic Liquid Crystals

Информация за книгата

Пълно описание

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