1994 Volume 38 Pages 223-228
A near-wall turbulence model is applied to the benthic boundary layer to analyze the diffusive transfer of dissolved substance across the sedimentwater interface. A modified turbulent kinetic energy balance is used to define eddy viscosity and eddy diffusivity in the viscous sublayer. The limiting behavior of turbulence quantities very near the bed is expressed as a power of z, the distance from the sediment-water interface. The predicted flux rate over a wide range of the Schmidt number and dissolved oxygen concentration profile near the bed are in good agreement with observations using microelectrodes.
