Zobrazeno 1 - 10
of 305
pro vyhledávání: '"Urbach, J."'
Autor:
Weigand, W. J., Messmore, A., Deheyn, D. D., Morales-Sanz, A., Blair, D. L., Urbach, J. S., Robertson-Anderson, R. M.
We characterize the scale-dependent rheological properties of mucus from the Chaetopterus marine worm and determine the intrinsic lengthscales controlling distinct rheological and structural regimes. Mucus produced by this ubiquitous filter feeder se
Externí odkaz:
http://arxiv.org/abs/1604.07887
Recent experimental and computational studies of vibrated thin layers of identical spheres have shown transitions to ordered phases similar to those seen in equilibrium systems. Motivated by these results, we carry out simulations of hard inelastic s
Externí odkaz:
http://arxiv.org/abs/1001.0881
Autor:
Reyes, F. Vega, Urbach, J. S.
Publikováno v:
J. Fluid Mech. vol. 636, pp. 279-293 (2009)
We study the Navier-Stokes steady states for a low density monodisperse hard sphere granular gas (i.e, a hard sphere ideal monatomic gas with inelastic interparticle collisions). We present a classification of the uniform steady states that can arise
Externí odkaz:
http://arxiv.org/abs/0807.5125
We demonstrate the effect of the depletion force in experiments and simulations of vertically vibrated mixtures of large and small steel spheres. The system exhibits size segregation and a large increase in the pair correlation function of the large
Externí odkaz:
http://arxiv.org/abs/cond-mat/0507623
Autor:
Olafsen, J. S., Urbach, J. S.
We report an experimental investigation of the transition from a hexagonally ordered solid phase to a disordered liquid in a monolayer of vibrated spheres. The transition occurs as the intensity of the vibration amplitude is increased. Measurements o
Externí odkaz:
http://arxiv.org/abs/cond-mat/0501028
Autor:
Melby, P., Reyes, F. Vega, Prevost, A., Robertson, R., Kumar, P., Egolf, D. A., Urbach, J. S.
We describe a series of experiments and computer simulations on vibrated granular media in a geometry chosen to eliminate gravitationally induced settling. The system consists of a collection of identical spherical particles on a horizontal plate vib
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412640
Autor:
Urbach, J. S., Olafsen, J. S.
A large number (~10,000) of uniform stainless steel balls comprising less than one layer coverage on a vertically shaken plate provides a rich system for the study of excited granular media. Viewed from above, the horizontal motion in the layer shows
Externí odkaz:
http://arxiv.org/abs/cond-mat/9907373
Autor:
Olafsen, J. S., Urbach, J. S.
Velocity distributions in a vibrated granular monolayer are investigated experimentally. Non-Gaussian velocity distributions are observed at low vibration amplitudes but cross over smoothly to Gaussian distributions as the amplitude is increased. Cro
Externí odkaz:
http://arxiv.org/abs/cond-mat/9905173
Autor:
Olafsen, J. S., Urbach, J. S.
Steady state dynamics of clustering, long range order, and inelastic collapse are experimentally observed in vertically shaken granular monolayers. At large vibration amplitudes, particle correlations show only short range order like equilibrium 2D h
Externí odkaz:
http://arxiv.org/abs/cond-mat/9807148
A study of magnetic avalanches in Perminvar, an Fe-Ni-Co alloy, shows that some avalanches are almost exactly reproducible from one magnetic field cycle to the next, while others show significant variability. Averaging over many cycles produces a fin
Externí odkaz:
http://arxiv.org/abs/adap-org/9508005