It is more feasible to scale the geometry while the properties of material and fluidizing medium are held constant. Even though this approach might not be consistent with a true scale-up effort, these experiments are essential to enhance our understanding of multi-phase dynamics at different scales. This is vital from a Simulation Based Engineering (SBE) point of view, which aims at predicting the behavior at different scales using highquality experimental data or results from numerical simulations having a high resolution.