Journal article
A non-linear viscoelastic model for sediments flocculated in the presence of seawater salts
C Goñi, RI Jeldres, PG Toledo, AD Stickland, PJ Scales
Colloids and Surfaces A Physicochemical and Engineering Aspects | Published : 2015
Abstract
A new empirical three-parameter viscoelastic model is proposed for describing the rheological behavior of linear and nonlinear materials. In particular, the model succesfully reproduced experimental creep curves at various constant stresses for flocculated suspensions of alumina in the presence of different types of seawater salts. The new model is compared to the classical standard linear solid model and to an extension of this, also proposed here, to represent nonlinear materials. Based on the goodness of fit, the new model is found to be the most appropriate for the experimental system studied. A sensitivity analysis of the parameters to applied stress and type of salt in the sediments re..
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Awarded by Australian Research Council
Funding Acknowledgements
RIJ thanks CONICYT-Chile for a graduate student fellowship and a research internship at the Department of Chemical and Biomolecular Engineering, The University of Melbourne, Australia, where the experimental work was carried out. We thank the support of CRHIAM Conicyt/Fondap Project-15130015 and Red Doctoral REDOC.CTA, MINEDUC Grant # UCO1202. The infrastructure support of the Particulate Fluids Processing Centre, a Special Research Centre of the Australian Research Council, is gratefully acknowledged.