title: Numerical simulation and measurement of liquid hold-up in biporous media containing discrete stagnant zones.
abstract: We have studied hydrodynamic dispersion in single-phase incompressible liquid flow through a fixed bed made of spherical, permeable (porous) particles. The observed behaviour was contrasted with the corresponding fluid dynamics in a random packing of impermeable (non-porous) spheres with an interparticle void fraction of 0.37. Experimental data were obtained in the laminar flow regime by pulsed field gradient nuclear magnetic resonance and were complemented by numerical simulations employing a hierarchical transport model with a discrete (lattice Boltzmann) interparticle flow field. Finite-size effects in the simulation associated with the spatial discretization of support particles or dimension and boundaries of the bed were minimized and the simulation results are in reasonable agreement with experiment.
authors.affiliation: Section of Computational Science, University of Amsterdam, The Netherlands.
authors.forename: D
authors.initials: D
authors.lastname: Kandhai
authors.forename: U
authors.initials: U
authors.lastname: Tallarek
authors.forename: D
authors.initials: D
authors.lastname: Hlushkou
authors.forename: A
authors.initials: A
authors.lastname: Hoekstra
authors.forename: P M A
authors.initials: PM
authors.lastname: Sloot
authors.forename: H
authors.initials: H
authors.lastname: Van As
mesh_terms: D001692:Biological Transport; D003102:Colloids / Q000737:chemistry*; D003198:Computer Simulation; D004058:Diffusion; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008956:Models, Chemical; D009038:Motion; D009716:Numerical Analysis, Computer-Assisted; D010316:Particle Size; D016062:Porosity; D011312:Pressure; D011789:Quantum Theory; D012212:Rheology / Q000379:methods*; D012996:Solutions / Q000737:chemistry*
chemical_list: D003102:Colloids; D012996:Solutions