Numerous factors influence the dynamics of material flow. When pumping multiphase granular suspensions, such as concrete, through complex piping systems, many questions remain unanswered. This research, conducted as part of the Priority Program SPP 2005 Opus Fluidum Futurum—Rheology of Reactive, Multiscale, Multiphase Construction Materials, funded by the German Research Foundation (DFG), aims to deepen our understanding of flow dynamics and particle mechanics under nonlinear flow conditions. The primary objective is to characterize flow-induced particle migration (FIPM) and the formation of a lubrication layer by analyzing concrete composition and its rheological properties. These factors play a crucial role in determining the flow behavior of multiphase granular suspensions and their impact on pump pressure. While existing studies have provided insights into the behavior of complex suspensions in generic flow conditions, their behavior in intricate geometries remains largely unexplored. This project employs both experimental and numerical approaches to investigate additional effects arising from streamline curvature and particle phase mass inertia. Through innovative experimental methods, significant insights have been gained into particle behavior within dense, opaque, enclosed moving systems. These findings contribute to the development and validation of models that qualitatively and quantitatively describe the flow behavior of multiphase granular suspensions in complex geometries, such as pipelines. Such knowledge is essential for predicting flow dynamics, assessing pressure loss, and preventing blockages during pumping. It also has broader applications in modern technologies, including 3D printing and energy-efficient pumping systems.