Discontinuous and dilatant viscosity behavior in concentrated suspensions III. Necessary conditions for their occurrence in viscometric flows

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Abstract

In this paper we review the fundamental mechanism proposed for the occurrence of dilatant and discontinuous viscosity behavior in concentrated suspensions undergoing a viscometric flow. Then from this mechanism a set of necessary conditions is established which must be obtained before this flow behavior will occur. Interestingly enough, there are a number of different ways that these conditions can be met and examples are given through consideration of previous literature studies as well as work presented for the first time in this paper. Some of our work is exploratory in nature and further studies are needed to fully define the effects that are observed.

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