Zobrazeno 1 - 10
of 205
pro vyhledávání: '"Levêque, E."'
Publikováno v:
Phys. Rev. Lett. 119, 254501 (2017)
The orientation of small anisotropic particles settling in a turbulent fluid determines some essential properties of the suspension. We show that the orientation distribution of small heavy spheroids settling through turbulence can be accurately pred
Externí odkaz:
http://arxiv.org/abs/1702.07516
Akademický článek
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Akademický článek
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Autor:
ICTR, Arneodo, A., Benzi, R., Berg, J., Biferale, L., Bodenschatz, E., Busse, A., Calzavarini, E., Castaing, B., Cencini, M., Chevillard, L., Fisher, R. T., Grauer, R., Homann, H., Lamb, D., Lanotte, A. S., Leveque, E., Luethi, B., Mann, J., Mordant, N., Mueller, W. -C., Ott, S., Ouellette, N. T., Pinton, J. -F., Pope, S. B., Roux, S. G., Toschi, F., Xu, H., Yeung, P. K.
Publikováno v:
Phys. Rev. Lett. 100, 254504 (2008)
We present a collection of eight data sets, from state-of-the-art experiments and numerical simulations on turbulent velocity statistics along particle trajectories obtained in different flows with Reynolds numbers in the range $R_\lambda \in [120:74
Externí odkaz:
http://arxiv.org/abs/0802.3776
A shear-improved Smagorinsky model is introduced based on recent results concerning shear effects in wall-bounded turbulence by Toschi et al. (2000). The Smagorinsky eddy-viscosity is modified subtracting the magnitude of the mean shear from the magn
Externí odkaz:
http://arxiv.org/abs/nlin/0605053
Publikováno v:
Physica D, 218, 77 (2006)
The phenomenology of velocity statistics in turbulent flows, up to now, relates to different models dealing with either signed or unsigned longitudinal velocity increments, with either inertial or dissipative fluctuations. In this paper, we are conce
Externí odkaz:
http://arxiv.org/abs/cond-mat/0510061
Publikováno v:
Physical Review Letters, 95, 064501 (2005).
We analyze the statistics of turbulent velocity fluctuations in the time domain. Three cases are computed numerically and compared: (i) the time traces of Lagrangian fluid particles in a (3D) turbulent flow (referred to as the "dynamic" case); (ii) t
Externí odkaz:
http://arxiv.org/abs/cond-mat/0507060
Publikováno v:
Physical Review Letters, 91, 214502, (2003)
We use the multifractal formalism to describe the effects of dissipation on Lagrangian velocity statistics in turbulent flows. We analyze high Reynolds number experiments and direct numerical simulation (DNS) data. We show that this approach reproduc
Externí odkaz:
http://arxiv.org/abs/cond-mat/0310105
New aspects of turbulence are uncovered if one considers flow motion from the perspective of a fluid particle (known as the Lagrangian approach) rather than in terms of a velocity field (the Eulerian viewpoint). Using a new experimental technique, ba
Externí odkaz:
http://arxiv.org/abs/physics/0206013
Publikováno v:
Phys. Rev. Lett., Vol. 85, 1436 (2000)
Motivated by recent experimental and numerical results, a simple unifying picture of intermittency in turbulent shear flows is suggested. Integral Structure Functions (ISF), taking into account explicitly the shear intensity, are introduced on phenom
Externí odkaz:
http://arxiv.org/abs/nlin/0006035