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

A lattice Boltzmann automaton (LBA) is used as a modelling approach to inve stigate the influence of pore-space geometry on intrinsic processes and com ponent distributions in recent tidal sediments. The simulations are perform ed on real pore-space structures obtained from scanning electron photomicro graphs, which document the mesoscopic geometry of bioactive sandy surface s ediments. 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-r esolution concentration gradients can therefore can be attributed to the st ructural heterogeneity of pore-space geometry. Copyright (C) 2001 John Wile y & Sons, Ltd.