Shear flow induced propagating domains in cholesterics

نویسنده

  • I. Jánossy
چکیده

2014 It is shown, that shear flow destabilizes the planar texture of cholesterics of pitch small compared to sample thickness above a threshold shear rate. In addition, in the presence of the shear, perturbations of the planar configuration propagate with a velocity proportional to the shear rate. In this paper we present a simplified theory of these effects and compare our results with experimental data. J. Physique 41 (1980) 437-442 MAI 1980, Classification Physics Abstracts 61.30201347.20

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Diffuso-mechanical coupling in cholesteric liquid crystals

2014 It has been observed that in cholesterics shear flow induces a transverse drift of small particles suspended in the liquid crystal. Quantitative measurements of the drift velocity are presented. The effect is interpreted using the analogy of the thermomechanical coupling, predicted for cholesterics. J. Physique LETTRES 42 ( 1981 ) L-41 L-43 Classification Physics Abstracts 61.30 15 JANVIER...

متن کامل

Surface gravity waves in deep fluid at vertical shear flows

Special features of surface gravity waves in deep fluid flow with constant vertical shear of velocity is studied. It is found that the mean flow velocity shear leads to non-trivial modification of surface gravity wave modes dispersive characteristics. Moreover, the shear induces generation of surface gravity waves by internal vortex mode perturbations. The performed analytical and numerical stu...

متن کامل

Electro-magneto-hydrodynamics Flows of Burgers' Fluids in Cylindrical Domains with Time Exponential Memory

This paper investigates the axial unsteady flow of a generalized Burgers’ fluid with fractional constitutive equation in a circular micro-tube, in presence of a time-dependent pressure gradient and an electric field parallel to flow direction and a magnetic field perpendicular on the flow direction. The mathematical model used in this work is based on a time-nonlocal constitutive equation for s...

متن کامل

Shear electricity in cholesterics

2014 From symmetry considerations it is possible to deduce that velocity gradients ought to induce electric polarizations in cholesteric liquid crystals. We show that flexoelectricity can be responsible for such a phenomenon. LE JOURNAL DE PHYSIQUE TOME 39, JUIN 1978, Classification Physics Abstracts 61.30 77.60

متن کامل

Investigation of vortex-induced vibration phenomenon in verticallong circular slender structure with non-uniform flows

Analyzing the vortex-induced vibration of a slender marine structure withlength to diameter ratio up to 200 is the objective of this study. This slender is free to move in both in-line and cross flow directions and immersed completely in water. Three different types of shear currents pass on it and cause to vibrate slender in different forms. Nowadays, these vibrations are very important for de...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2016