Simulation of turbulence and dissolved oxygen concentration profiles over biofilm using kappa-epsilon turbulence model

摘要

The objective of this study is to investigate the flow structure over biofilm experimentally and theoretically. Velocity and turbulence profiles over biofilm measured by a laser Doppler velocimetry were compared to simulated profiles using the kappa-epsilon turbulent model. Also, dissolved oxygen concentration profiles over biofilm are measured using a micro DO sensor. The k-e turbulence model was proved to be a useful tool for the understanding of mass transfer inside and outside biofilm. Dissolved oxygen concentration profile inside and outside biofilm showed the existence of turbulent diffusion inside biofilm.