Research on the specific viscosity of semi-concentrated fiber suspensions. (English) Zbl 1171.76059

Summary: The viscosity properties of semi-concentrated suspensions of fibers with small aspect ratio were investigated in transient shear flows using a concentric cylinder geometry. Experimental results were compared with predictions by utilizing the constructive model developed by G. K. Batchelor [J. Fluid Mech. 44, 419–440 (1970; Zbl 0216.52401)] in conjunction with the hybrid closure proposed by S. G. Advani and C. L. Tucker [J. Rheol. 31, 751–783 (1987)]. To rectify the discrepancy between the theoretical prediction available at the present time and measured data, a new expression for the specific viscosity in semi-concentrated shear flows of fiber suspension is proposed allowing for fiber-fiber interactions and for finite-aspect-ratio fibers. The results show that the model predictions for different aspect ratios and concentrations are fairly good.


76T20 Suspensions


Zbl 0216.52401
Full Text: DOI


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