Results 221 to 230 of about 26,469 (261)

Dynamic Hardness Testing Procedures

2007
IN DYNAMIC HARDNESS TESTING PROCEDURES, THE INDENTER HITS the specimen surface with impact. The specimen material can thereby be elastically and unelastically deformed. Deformation that arises due to the kinetic energy of the indenter and remains can be measured.
exaly   +2 more sources

Dynamics of hard-sphere suspensions

Physical Review E, 1994
A systematic theory for the dynamics of concentrated hard-sphere suspensions of interacting Brownian particles with both hydrodynamic and direct interactions is presented. An alternative equation for the number density of particles is derived. The volume-fraction dependence of the short- and long-time self-diffusion coefficients is thus explored from a
, Tokuyama, , Oppenheim
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Metapopulation Dynamics of Hard Corals

2006
This chapter describes a prototypic, spatially structured model for hard corals and their main competitor, macroalgae. Hard corals certainly form spatially structured populations, but whether they form true metapopulations is less clear. A classic metapopulation envisages a large array of habitat patches that are either occupied by a population or not.
Mumby, Peter J., Dytham, Calvin
openaire   +3 more sources

Brownian dynamics of hard spherocylinders

Physical Review E, 1994
A model of hard spherocylinders exhibiting Brownian dynamics in a solvent is investigated by Brownian dynamics simulations. Long-time translational and rotational self-diffusion coefficients are calculated in the disordered phase over the whole range of densities and a ratio p of total length to width ranging from 1 to 6. A simple analytical formula is
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Dynamical correlations in Brownian hard rods

The Journal of Chemical Physics, 2006
We analyze the time decay of small amplitude density perturbations in systems of highly packed Brownian hard rods, relaxing towards a uniform density distribution. The results of Brownian dynamics simulations and those of the deterministic dynamic density functional (DDF) theory, are contrasted with a new theoretical approach beyond the DDF assumptions.
F, Penna, P, Tarazona
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Dynamic equivalences in the hard-sphere dynamic universality class

Physical Review E, 2013
We perform systematic simulation experiments on model systems with soft-sphere repulsive interactions to test the predicted dynamic equivalence between soft-sphere liquids with similar static structure. For this we compare the simulated dynamics (mean squared displacement, intermediate scattering function, α-relaxation time, etc.) of different soft ...
Leticia, López-Flores, Honorina, Ruíz-Estrada, Martín, Chávez-Páez, Magdaleno, Medina-Noyola   +3 more
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Dynamical properties of hard-sphere suspensions

Physical Review A, 1992
We present an alternative approach to the calculation of long-time diffusion coefficients of dense suspensions. The main idea is to approximate friction coefficients rather than the diffusion coefficients. Within this scheme we derive a very simple yet accurate theory of dynamic properties of a hard-sphere suspension: to calculate friction coefficients
, Leegwater, , Szamel
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Particle dynamics in hard-sphere systems

Mechanics Research Communications, 2000
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Singh, P., Huang, C.
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Dynamics of crystallization in hard-sphere suspensions

Physical Review E, 1996
Density fluctuations are monitored by small-angle light scattering during the crystallization of 0.22-\ensuremath{\mu}m-radius, hard colloidal spheres. Measured structure factors show an intensity maximum at finite-scattering vectors. The shape of the intensity distribution scales at early times during nucleation and growth and again at large times ...
, He, , Ackerson, , van Megen W, , Underwood, , Schätzel   +4 more
openaire   +2 more sources