The fragmentation and restructuring under shear of agglomerates of fine mineral particles are studied with the Distinct Element Method. The model used takes into account contact forces, van der Waals forces, and hydrodynamic forces computed with the free-draining approximation. A loose initial...

The percolation of small particles through a periodic random loose packing of large beads is studied numerically with the Distinct Element Method. The representativity of periodic mono-sized sphere packing of varying system size was first studied by comparing their pore size distributions and...

Computer modelling for evolutionary systems consists in: (1) to store in the memory the individual features of each member of a large population; and (2) to update the whole system repeatedly, as time goes by, according to some prescribed rules (reproduction, death, ageing, etc.) where some...

The extended XY-model, a classical system of planar rotators with nearest neighbor interaction, is studied with molecular dynamics simulations. This model exhibits a first-order phase transition between a low-temperature phase with algebraic decay of spatial correlations and a high-temperature...

Williams and Bjerknes proposed a simple stochastic growth model to describe the tumor growth in the basal layer of an epithelium. In this work we generalize this model by including the possibility of saturation in the tumor growth as it is clinically observed. The time evolution of the average...

We apply lattice Boltzmann method to study the phase separation of a two-dimensional binary fluid mixture in shear flow. The algorithm can simulate systems described by the Navier–Stokes and convection–diffusion equations. We propose a new scheme for imposing the shear flow which has the...

We have studied the flocculations of colloidal suspensions under shear flows. Using the three-dimensional model constructed on simple-cubic lattice, we have clarified the structural formation of colloidal suspensions and their growth kinetics by computer simulations. In the time development of...

We present a numerical study of the dynamics of a non-ideal fluid subject to a density-dependent pseudo-potential characterized by a hierarchy of nested attractive and repulsive interactions. It is shown that above a critical threshold of the interaction strength, the competition between stable...

In this paper, a general equilibrium model of a monetary production economy is presented. The model is characterized by three classes of agents: a representative firm, heterogeneous households, and the government. Two markets (i.e., a labour market and a goods market, are considered) and two...

In this work we analyze a simple model of adsorption-induced surface reconstruction, which is developed in the framework of the lattice gas model. The critical behavior of the substrate atoms is obtained by monitoring the specific heat and the fluctuations in the fraction of unreconstructed...