The friction and diffusion coefficients of a massive Brownian particle in a mesoscopic solvent are computed from the force and the velocity autocorrelation functions. The mesoscopic solvent is described in terms of free streaming of the solvent molecules, interrupted at discrete time intervals by multiparticle collisions that conserve mass, momentum, and energy. The Brownian particle interacts ...

We introduce a large class of random velocity elds on the periodic lattice and in discrete time having a certain hidden Markov structure. The generalized Lagrangian velocity (the velocity eld as viewed from the location of a single moving particle) has similar hidden Markov structure, and its law is found exactly. As a result, the law of the trajectory of an individual particle is known in prin...

Contaminant control is becoming a major issue of nanoscale device. Cryogenic aerosol beam using micron-sized aerosol particles has long been successfully used to remove contaminant particles (CPs) down to 50nm, and supersonic particle beam using particles smaller than 100nm lowered the limit of cleaning down to 20nm size. In this study, the supersonic particle beam technique that uses nanometer...

A simultaneous measurement technique for the velocity distributions and scholar distributions, e.g., pressure, temperature, and so on, has been proposed. It visualized the spatial distribution using the multi-purpose particles, which has been coated with pressure-sensitive dye. The proposed particle technique, called the PSParticle method, is a hybrid system combining the technologies of pressu...

When an individual is closed to the optimal particle, its velocity will approximate to zero. This is the main reason why the particle swarm optimization algorithm is prone to trap into local minima, therefore using a strategy in which the velocity is not dependent on the size of distance between the individual and the optimal particle but only dependent on its direction, an adaptive scheme is a...

We perform molecular dynamics (MD) simulations (based on the soft-sphere model) of a model dry granular system consisting of two types of spherical particles differing in size and/or density to characterize particle-particle momentum transfer (solid drag). The velocity difference between two types of particles is specified in the initial conditions, and the evolution of relative mean velocity a...

User control over fluid simulations is a long-standing research problem in computer graphics. Applications in games and films often require recognizable creatures or objects formed from smoke, water, or flame. This paper describes a two-layer approach to the problem, in which a bulk velocity drives a particle system towards a target distribution, while simultaneously a vortex particle simulatio...

The rate and distance-dependence of association between surface-attached molecules may be determined by monitoring the motion of receptor-bearing spheres along ligand-coated surfaces in a flow chamber (Pierres et al., Proc. Natl. Acad. Sci. U.S.A. 95:9256-9261, 1998). Particle arrests reveal bond formation, and the particle-to-surface distance may be estimated from the ratio between the velocit...