Experiment and modelling of birefringent flows using commercial CFD code

Tomlinson, R. A.; Pugh, D.; Beck, Steven

doi:10.1016/j.ijheatfluidflow.2006.01.007

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“…At rest, these particles or macromolecules are randomly orientated by Brownian motion and the fluid appears optically isotropic. When under the effect of shear, the particles align in a have also been successfully investigated (Funfschilling and Li 2001;Hu et al 2009;Mackley and Hassell 2011;Martyn et al 2000;Tomlinson et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Birefringent properties of aqueous cellulose nanocrystal suspensions

2022

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Birefringence measurements of aqueous cellulose nanocrystal (CNC) suspensions are reported. Seven suspensions with concentrations between 0.7 and 1.3% per weight are sheared in a Taylor-Couette type setting and characterized using a birefringent measurement technique based on linear polarized light and acquisition with a polarization camera. Steady state measurements with shear rates up to 31 1/s show extinction angles of 23°–40° and birefringence in the order of 1e–5. The findings demonstrate the utility of CNC suspensions for flow birefringence studies.

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