Image based meshing of packed beds of cylinders at low aspect ratios using 3d MRI coupled with computational fluid dynamics

• Published in: Computers & chemical engineering 2011-10, Vol.35 (10), p.1969-1977
• Main Authors: Baker, M.J., Young, P.G., Tabor, G.R.
• Format: Article
• Language: English
• Subjects: CFD; Computation; Computational fluid dynamics; Computational methods in fluid dynamics; Computer programs; Exact sciences and technology; Flows through porous media; Fluid dynamics; Fundamental areas of phenomenology (including applications); Mathematical models; Meshing; MRI; Nonhomogeneous flows; Packed bed; Packed beds; Physics; Pressure drop; Software
• ISSN: 0098-1354; 1873-4375
• DOI: 10.1016/j.compchemeng.2011.03.017

► We investigate flow through a disordered packed bed of cylinders. ► Actual bed constructed and scanned using MRI. ► Image-Based Meshing techniques used to create CFD mesh. ► Very good agreement between CFD and experimental measurements. CFD is a valuable tool for understanding the flow and pressure drop in packed beds. However, determining the geometry can be complex. One possible method is to use a non-invasive imaging method such as MRI, however, problems occur in processing complex geometries when using traditional commercial meshing software. This work focuses on the use of image based meshing software originally developed for the field of computational biomechanics, to create geometries from 3d MRI scans of packed beds for use with computational dynamics. For this work we focus on disordered packed beds of cylinders at low aspect ratios and Reynolds numbers of Re = 1431–5074 (based on particle diameter and superficial velocity). We compare CFD studies with experimental data performed on the actual scanned beds and compare these with the correlation proposed by Eisfeld and Schnitzlein (2001). Computational data is shown to correlate well with experimental and theoretical results.