“…Compared to the numerous studies on Newtonian slurry flows, the transport of coarse particles in a non-Newtonian carrier fluid has not been studied extensively, which is probably due to the complex interactions between particles and non-Newtonian carrier fluid. 4 In addition to the hydrodynamic conditions, the rheological parameters, e.g., yield stress, are also of paramount importance to determining the flow behavior. For a broad particle size distribution, Pullum et al 29 divided the particle sizes into three categories according to the resulting flow patterns, i.e., carrier equivalent fluid, heterogeneous and fully stratified, which correspond to particle sizes d p < 200 μm, 200 μm ≤ d p < 0.015D, and d p > 0.015D, where D is the pipe diameter, respectively.…”