Zobrazeno 1 - 10
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pro vyhledávání: '"Biferale L"'
In hydrodynamic (HD) turbulence an exact decomposition of the energy flux across scales has been derived that identifies the contributions associated with vortex stretching and strain self-amplification (P. Johnson, Phys. Rev. Lett., 124, 104501 (202
Externí odkaz:
http://arxiv.org/abs/2402.10125
Publikováno v:
Phys. Rev. Fluids 6, 050503 (2021)
We study the applicability of tools developed by the computer vision community for features learning and semantic image inpainting to perform data reconstruction of fluid turbulence configurations. The aim is twofold. First, we explore on a quantitat
Externí odkaz:
http://arxiv.org/abs/2006.09179
We present TURB-Rot, a new open database of 3d and 2d snapshots of turbulent velocity fields, obtained by Direct Numerical Simulations (DNS) of the original Navier-Stokes equations in the presence of rotation. The aim is to provide the community inte
Externí odkaz:
http://arxiv.org/abs/2006.07469
Computational Fluid Dynamics (CFD) is currently used to design and improve the hydraulic properties of biomedical devices, wherein the large scale blood circulation needs to be simulated by accounting for the mechanical response of red blood cells (R
Externí odkaz:
http://arxiv.org/abs/2004.04109
Publikováno v:
Phys. Rev. Fluids 5, 104603 (2020)
By using direct numerical simulations of up to a record resolution of 512x512x32768 grid points we discover the existence of a new metastable out-of-equilibrium state in rotating turbulence. We scan the phase space by varying both the rotation rate (
Externí odkaz:
http://arxiv.org/abs/2002.08784
Publikováno v:
Phys. Rev. B 100, 134515 (2019)
We report on a combined theoretical and numerical study of counterflow turbulence in superfluid $^{4}$He in a wide range of parameters. The energy spectra of the velocity fluctuations of both the normal-fluid and superfluid components are strongly an
Externí odkaz:
http://arxiv.org/abs/1908.01144
Publikováno v:
Phys. Rev. X 10, 011023 (2020)
Nudging is an important data assimilation technique where partial field measurements are used to control the evolution of a dynamical system and/or to reconstruct the entire phase-space configuration of the supplied flow. Here, we apply it to the tou
Externí odkaz:
http://arxiv.org/abs/1905.05860
Publikováno v:
Phys. Rev. Lett. 122, 144501 (2019)
Three-dimensional anisotropic turbulence in classical fluids tends towards isotropy and homogeneity with decreasing scales, allowing --eventually-- the abstract model of "isotropic homogeneous turbulence" to be relevant. We show here that the opposit
Externí odkaz:
http://arxiv.org/abs/1901.02215
Autor:
Alexakis, A., Biferale, L.
Turbulence is characterized by the non-linear cascades of energy and other inviscid invariants across a huge range of scales, from where they are injected to where they are dissipated. Recently, new experimental, numerical and theoretical works have
Externí odkaz:
http://arxiv.org/abs/1808.06186
A Hybrid Monte Carlo algorithm for sampling rare events in space-time histories of stochastic fields
Autor:
Margazoglou, G., Biferale, L., Grauer, R., Jansen, K., Mesterházy, D., Rosenow, T., Tripiccione, R.
Publikováno v:
Phys. Rev. E 99, 053303 (2019)
We introduce a variant of the Hybrid Monte Carlo (HMC) algorithm to address large-deviation statistics in stochastic hydrodynamics. Based on the path-integral approach to stochastic (partial) differential equations, our HMC algorithm samples space-ti
Externí odkaz:
http://arxiv.org/abs/1808.02020