What is the fine-grained topic of the following text: We then indicate how a relatively simple rate-dependent rheological model for the particles that incorporates yield may be used in the context of a two-phase mixture theory that distinguishes between the depths of the fluid and particle phases to reproduce what is seen in the experiments on both uniform and non-uniform flows. Only return the topic.
Application of a rate-dependent rheological model in two-phase mixture theory for flow experiments.