Brownian motion of particles suspended in a fluid is studied, and expressions derived for the particle diff usivity and velocity autocorrelation function. The theory of thermal noise in a general linear system is applied to both the particl

Periodic boundary conditions (PBC) are a set of boundary conditions that can be used to simulate a large system (i.e. bulk material) simply by modeling a finite Representive Volume Element (RVE). PBC has been favored among many researchers and practi