Abstract
A method based on Tikhonov regularisation is used to convert the Couette viscometry data of a number of liquid foods into shear stress vs shear rate relationships. For liquid foods that have a yield stress and if the viscometry data cover the appropriate range of shear stress, Tikhonov regularisation is used to compute simultaneously the yield stress. The versatility of Tikhonov regularisation is demonstrated by applying it to process data from wide as well as narrow gap Couette viscometers. The results generated by Tikhonov regularisation are compared against that obtained by methods currently employed by rheologists.
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References
Engl HW, Hanke M, Neubauer A (2000) Regularization of inverse problems. Kluwer, Dordrecht
Leong YK, Yeow YL (2002) Determination of yield stress from cone-and-plate viscometry data. J Food Sci (submitted)
Nguyen QD, Boger DV (1992) Measuring the flow properties of yield stress fluids. Ann Rev Fluid Mech 24:47–88
Steffe JF (1996) Rheological methods in food process engineering, 2nd edn. Freeman, East Lansing
Yeow YL, Ko WC, Tang PPP (2000) Solving the inverse problem of Couette viscometry by Tikhonov regularisation. J Rheol 44:1335–1351
Yeow YL, Wickramasinghe SR, Leong Y-K, Han B (2002) Model-independent relationships between hematocrit, blood viscosity and yield stress derived from Couette viscometry data. Biotechnol Prog 18:1068–1075
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Leong, Y.K., Yeow, Y.L. Obtaining the shear stress shear rate relationship and yield stress of liquid foods from Couette viscometry data. Rheol Acta 42, 365–371 (2003). https://doi.org/10.1007/s00397-002-0283-6
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DOI: https://doi.org/10.1007/s00397-002-0283-6