Investigations on the influence of pore‐space geometry on concentration patterns and transportation properties of dissolved oxygen in a bioactive sandy sediment by a lattice Boltzmann automaton model

摘要

A lattice Boltzmann automaton (LBA) is used as a modelling approach to investigate the influence of pore-space geometry on intrinsic processes and component distributions in recent tidal sediments. The simulations are performed on real pore-space structures obtained from scanning electron photomicrographs, which document the mesoscopic geometry of bioactive sandy surface sediments. The discrete transport–reaction model for dissolved oxygen shows that in advective controlled systems oxygen concentration properties can be clearly related to the pore-space geometry. Variability of measured high-resolution concentration gradients can therefore can be attributed to the structural heterogeneity of pore-space geometry. Copyright © 2001 John Wiley & Sons, Ltd.