Extending flow birefringence analysis to combined extensional-shear flows via Jeffery-Hamel flow measurements
This study demonstrates that in combined extensional-shear Jeffery-Hamel flows, the flow birefringence of a cellulose nanocrystal suspension follows a root-sum-square relationship of shear and extensional contributions, thereby validating the extension of stress-birefringence analysis to complex, multi-mode deformation fields.