Conoscopic observation of director reorientation during Poiseuille flow of a nematic liquid crystal
Holmes, Christopher J.; Cornford, Stephen Leslie; Sambles, J. Roy
Date: 30 October 2009
Journal
Applied Physics Letters
Publisher
American Institute of Physics
Publisher DOI
Abstract
Director reorientation under pressure driven (Poiseuille) flow is observed conoscopically for the liquid crystal 5CB aligned at an azimuthal angle of 45° to the direction of flow. A polyimide surface treatment (AL 1254) is used to promote planar homogeneous alignment and rubbed to produce an initial azimuthal alignment angle Ø0. ...
Director reorientation under pressure driven (Poiseuille) flow is observed conoscopically for the liquid crystal 5CB aligned at an azimuthal angle of 45° to the direction of flow. A polyimide surface treatment (AL 1254) is used to promote planar homogeneous alignment and rubbed to produce an initial azimuthal alignment angle Ø0. Conoscopic interference figure rotation is documented as a function of flow rate and compared to that produced from numerical models using Leslie–Ericksen–Parodi theory. Model and data show excellent agreement.
Physics and Astronomy
Faculty of Environment, Science and Economy
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