Rayleigh–Benard Convection in the homeotropic nematic liquid crystal by a Gaussian laser beam absorption, By Jafar Poursamad Bonab

Research

Title	Rayleigh–Benard Convection in the homeotropic nematic liquid crystal by a Gaussian laser beam absorption
Type	Article
Keywords	Liquid crystals Rayleigh–Benard Convection Optical nonlinearity
Researchers	Jafar Poursamad Bonab، Mohammad Asadpour، Arash Phirouznia، Mostafa Sahrai

Abstract

The Rayleigh–Benard Convection (RBC) were studied theoretically in the homeotropic nematic liquid crystal (NLC) cell due to the absorption of a normally incident Gaussian light beam from upper side of the cell. It was shown that a convection of hydrodynamic motion in the NLC can be induced and eventually the molecular director coupling with hydrodynamics reorients the director. An external magnetic field parallel to the director decreases the director reorientation and the radial flow velocity, while the velocity in the z direction is unaffected. The results were found to be in a range that can easily be checked experimentally