Zobrazeno 1 - 10
of 445
pro vyhledávání: '"Chevillard L"'
We present the extension of a modeling technique for Lagrangian tracer particles [B. Viggiano et al., J. Fluid Mech.(2020), vol. 900, A27] which accounts for the effects of particle inertia. Thereby, the particle velocity for several Stokes numbers i
Externí odkaz:
http://arxiv.org/abs/2106.07183
Autor:
Saint-Michel, B, Herbert, E, Salort, J, Baudet, C, Mardion, M Bon, Bonnay, P, Bourgoin, M, Castaing, B, Chevillard, L, Daviaud, F, Diribarne, P, Dubrulle, B, Gagne, Y, Gibert, M, Girard, A, Hébral, B, Lehner, Th, Rousset, B
We report measurements of the dissipation in the Superfluid Helium high REynold number von Karman flow (SHREK) experiment for different forcing conditions, through a regime of global hysteretic bifurcation. Our macroscopical measurements indicate no
Externí odkaz:
http://arxiv.org/abs/1401.7117
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
Publikováno v:
Phys. Fluids 20, 101504 (2008)
Modeling the velocity gradient tensor A along Lagrangian trajectories in turbulent flow requires closures for the pressure Hessian and viscous Laplacian of A. Based on an Eulerian-Lagrangian change of variables and the so-called Recent Fluid Deformat
Externí odkaz:
http://arxiv.org/abs/0712.0900
Autor:
Chevillard, L., Meneveau, C.
Publikováno v:
Physical Review Letters 97, 174501 (2006)
The local statistical and geometric structure of three-dimensional turbulent flow can be described by properties of the velocity gradient tensor. A stochastic model is developed for the Lagrangian time evolution of this tensor, in which the exact non
Externí odkaz:
http://arxiv.org/abs/cond-mat/0606267
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 95, 200203 (2005)
We perform a statistical analysis of experimental fully developed turbulence longitudinal velocity data in the Fourier space. We address the controversial issue of statistical intermittency of spatial Fourier modes by acting on the finite spectral re
Externí odkaz:
http://arxiv.org/abs/cond-mat/0506169
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
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