Determination of the Power Law Exponent from Magnetic Resonance Imaging (MRI) Flow Data

摘要

Flow of Newtonian fluids in packed beds and filters has been investigated extensively in the past [1-3], whereas there are deficits of knowledge about non-Newtonian fluids, even though the filtration of such fluids commonly occurs in industrial processes. Integral quantities, such as flow rate and pressure loss are usually used to describe the properties of flowing non-Newtonian fluids, but the velocity distributions, depending on the geometry of the pore structure, have not yet been investigated [4]. Using MRI, the fluid distribution as well as the velocity in the hollow space can be determined nondestructively. This allows for a more detailed understanding of the flow processes of non-Newtonian fluids in a packed bed. The final aim of our investigations is to find criteria for favorable pore structures (filter design).