A lattice Boltzmann model with random dynamical constraints
Antonio Lamura
Abstract
We introduce a lattice Boltzmann model capable to mimick some features of fluid systems approaching the glass transition. The physical system is modeled as a one-dimensional fluid, interacting with finite-lifetime moving obstacles. Fluid motion is described by a lattice Boltzmann equation and obstacles are randomly distributed semi-permeable barriers which constrain the motion of the fluid particles. After a lifetime delay, obstacles move to new random positions. It is found that the non-linearly coupled dynamics of the fluid and obstacles produces heterogeneous patterns in fluid density and non-exponential relaxation of two-time autocorrelation function.
Elenco dei partecipanti al convegno di Bari.