The air viscous fingers in glycerol, nematic and smectic liquid crystals are studied using the so-called lifting Hele-Shaw cell geometry. It is shown experimentally that in this case a critical velocity of lifting exists, below which the viscous fingers do not grow. The dependences of this velocity and critical wavelength upon various parameters are measured. The obtained experimental data in the case of small lifting angles are in satisfactory agreement with the phenomenological estimations for linear Hele-Shaw cells.
AIR VISCOUS FINGERS IN ISOTROPIC FLUID AND LIQUID-CRYSTALS OBTAINED IN LIFTING HELE-SHAW CELL GEOMETRY
BARTOLINO, Roberto
1993-01-01
Abstract
The air viscous fingers in glycerol, nematic and smectic liquid crystals are studied using the so-called lifting Hele-Shaw cell geometry. It is shown experimentally that in this case a critical velocity of lifting exists, below which the viscous fingers do not grow. The dependences of this velocity and critical wavelength upon various parameters are measured. The obtained experimental data in the case of small lifting angles are in satisfactory agreement with the phenomenological estimations for linear Hele-Shaw cells.File in questo prodotto:
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