9. Applications of optical methods

G.M. Zharkova, V.N. Kovrizhina
Khristianovich Institute of Theoretical and Applied Mechanics, Russia

Liquid crystals and techniques for near-wall flows diagnostics

The paper presents the results of thermotropic liquid crystals studies for diagnostics of shear stresses induced by near-wall flow. Two approaches are outlined: textural transition from confocal to planar texture and selective reflection shift of planar texture under shear stress. Spectral and colorimetric calibrations versus shear stress are given.
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