Modeling of the efficiency of fibrous filters through numerical simulationand X-ray tomography

This paper describes modeling of the efficiency of fibrous filters using nu merical simulation and X-ray computerized tomography (XCT). Variations in t he flow field within the filter due to particle accumulation and structural inhomogeneities are taken into account in the mathematical model. Both the theoretical results and the experimental XCT data (digital images) showed that in the depth filtration process analyzed there is graded particle accu mulation, Larger particles form bridges and can improve the collection for smaller particles during the filtration time. It is also found that smaller particles tend to promote a more pronounced pressure drop.