Numerical Modeling of Bacterium-surface Interaction by Applying DEM☆

摘要: Abstract In order to understand the behaviour system of bacteria it is important a single bacteria. The suspension forming may be considered as living active ultrafine particles (size 1 μm). Present investigation addresses simulation S. aureus bacterium-surface interactions in framework Discrete Element Method (DEM). Bacterium spherical shape, while glass surface flat and elastic. this work theoretical model for similar that used size stiff particles. We investigate particle by applying two known Derjaguin, Muller, Toporov (DMT) [1] Landau, Verwey, Overbeek (DLVO) [2,3] models, which are objects. These models enhanced suggested dissipation mechanism related adhesion. It was assumed energy can dissipated force-displacement hysteresis occur through adhesion effect, where an amount fixed independent on initial kinetic energy. This observed at physical experiments with provided means atomic force microscopy (AFM), Ubbink Schar-Zammaretti (2007) [4]. illustrated presented adhesive-dissipative model, applies DEM, offers opportunity capture effect during contact. numerical confirm plots exhibit typical those AFM experiments. useful interaction bacterium substrate.