Brownian Dynamics Simulations of Aggregation and Gel Formation in Lennard-Jones Fluids

摘要: Abstract We report structural, thermodynamic and rheological properties of a three dimensional Lennard-Jones fluid as it is quenched, at various densities, from above the critical temperature into two phase gas-liquid coexistence region. The structural dynamical behaviour observed has many similarities with sol-gel transition. There growth in cluster size for spherical particles, evident also growing peak heights radial distribution function, formation percolating network low (T∼0.2–0.3) sufficiently high volume fractions (>0.1). This change marked by diverging relaxation times, manifest an increasing viscosity decreasing self-diffusion coefficient during quench. shear stress time correlation functions exhibit stretched exponential long time. In fact, limiting dominated single time, which excellent Maxwell-like visnoelastic l...