The flow of a dense slurry where the filling particles are heavier than the liquid carrier is analyzed by considering the particle-particle and particle-wall interactions, which were derived from fluid film lubrication theory. The effect of settlement causes the flow behavior to depart from that of slug flow (described in [1], also submitted to this Congress). It is found that steady flow is still possible, and, for a few representative packing patterns considered, somewhat modified patterns exist. An ongoing under-fill flow experiment aimed at validating the above theoretical results is described.

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