Simulation Of Dynamic Properties Research Articles

Numerical simulations of dynamic properties of the restricted solid-on-solid model on fractal substrates

In order to investigate the effect of the structure of a non-complete substrate on the dynamic behaviors of a growing surface, the restricted solid-on-solid model on Sierpinski arrowhead and Crab fractal substrates, which have the same fractal dimensions but of different spectrum dimensions, are extensively studied by means of numerical simulations. The surface width and the maximal height of the saturated surface are calculated. It is found that the microscopic structure of the substrates affects significantly the dynamic properties of the surfaces. Although the restricted solid-on-solid model evolving on two kinds of fractal substrates exhibits dynamic scaling behavior, the standard Family-Vicsek scaling is still satisfied for different dynamic scaling exponents. The maximal height of the width of saturated surface can be fitted by Asym2Sig distribution, not by the three kinds of usual extreme statistical distribution, i.e. Weibull, Gumbel, and Frechet distributions.

Simulation of Dynamic Properties of ER Damper

By way of Matlab software simulation, the relationship among shear stress and frequency, velocity, displacement and ER properties has been researched, the damper strength -- velocity, damper strength – drift properties of shear electrorheological fluid damper has been given, the law of damper strength with frequency, gap , diameter and electric field strength has been showed that damper strength is increasing with electric field strength, the biggest damper strength is 100kN, the key facters are velocity, drift, frequency, gap and etc.

Simulation of static and dynamic properties of edge-emitting multiple-quantum-well lasers

This paper demonstrates simulation tools for edge-emitting multiple-quantum-well (MQW) lasers. Properties of the strained MQW active region are simulated by eight-band kp calculations. Then, a two-dimensional simulation along the transverse cross section of the device is performed based on a drift-diffusion model, which is self-consistently coupled to equations for the optical field. Furthermore, a method is described that allows for an efficient quasi-three-dimensional simulation of dynamic properties of multisection edge-emitting lasers.

Supercomputing Studies of Biomembranes

Although computer simulation of biological molecules has seen widespread growth and is widely accepted as an important biochemical tool, it is hampered by lim ited computing resources. Biomolecular systems, by necessity, contain a large number of interaction sites. In many cases, these sites interact over quite large dis tances. Further, the time scales of biological interest are long, which requires that simulations of dynamical properties at the atomic level must be lengthy to ade quately probe these motions. We address these issues through discussions of atomic-level molecular dynam ics simulations of biological lipid bilayer membranes, which are key constructs in biochemistry. These simu lations reproduce many experimental observables and provide a degree of resolution currently unavailable experimentally. The lengths of these simulations, the longest of which was 2 nanoseconds, were sufficient to effectively sample many of the motions governing the behavior of biomembranes. Examples are given showing the importance of long-range interactions. The number of interaction sites required by these sim ulations is discussed, particularly the need for explicit representation of solvent molecules.