Zobrazeno 1 - 10
of 112
pro vyhledávání: '"Victor Yakhot"'
Publikováno v:
Physical Review Research, Vol 6, Iss 3, p 033087 (2024)
A recent discovery about the inertial range of homogeneous and isotropic turbulence is the saturation of the scaling exponents ζ_{n} for large n, defined via structure functions of order n as S_{n}(r)=〈(δ_{r}u)^{n}〉=A(n)r^{ζ_{n}}. We focus on
Externí odkaz:
https://doaj.org/article/6531c50c0bb64cb5ab649c18df2db57e
Publikováno v:
Atmosphere, Vol 14, Iss 7, p 1109 (2023)
We show theoretically that the mean turbulent dynamics can be described by a kinetic theory representation with a single free relaxation time that depends on space and time. A proper kinetic equation is constructed from the Klimontovich-type kinetic
Externí odkaz:
https://doaj.org/article/a5f9ba1e79ca43fd89f1053f7b1a7a06
Publikováno v:
Physical Review Fluids. 6
Turbulent flows contain occasional, well-separated sharp features, as illustrated in this picture by Bonn et al. (1993), reproduced with permission, surrounded mostly by low levels of activity. Both interacting structures contribute to the complexity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2f383f93d0abb9b05f2d0572d272e1c4
https://doi.org/10.1103/physrevfluids.6.104604
https://doi.org/10.1103/physrevfluids.6.104604
Publikováno v:
Physical Review E. 98
If a fluid flow is driven by a weak Gaussian random force, the nonlinearity in the Navier-Stokes equations is negligibly small and the resulting velocity field obeys Gaussian statistics. Nonlinear effects become important as the driving becomes stron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32cb9a515da3045729695a1d3c31401a
https://doi.org/10.1103/physreve.98.033120
https://doi.org/10.1103/physreve.98.033120
Autor:
Diego Donzis, Victor Yakhot
To characterize fluctuations in a turbulent flow, one usually studies different moments of velocity increments and dissipation rate, $\overline{(v(x+r)-v(x))^{n}}\propto r^{\zeta_{n}}$ and $\overline{{\cal E}^{n}}\propto Re^{d_{n}}$, respectively. In
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::177a743e0369dabaa8129547476620f9
http://arxiv.org/abs/1801.06102
http://arxiv.org/abs/1801.06102
Publikováno v:
Nano Letters. 15:8070-8076
Single-crystal diamond nanomechanical resonators are being developed for countless applications. A number of these applications require that the resonator be operated in a fluid, i.e., a gas or a liquid. Here, we investigate the fluid dynamics of sin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e905ddb667b2020ecdea5e99a529ec65
https://doi.org/10.1021/acs.nanolett.5b03503
https://doi.org/10.1021/acs.nanolett.5b03503
Autor:
Victor Yakhot, Diego Donzis
Publikováno v:
Physical Review Letters. 119
We consider transition to strong turbulence in an infinite fluid stirred by a gaussian random force. The transition is {\bf defined} as a first appearance of anomalous scaling of normalized moments of velocity derivatives (dissipation rates) emerging
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab25a0250122add1f2101b0a2811f8ba
https://doi.org/10.1103/physrevlett.119.044501
https://doi.org/10.1103/physrevlett.119.044501
Publikováno v:
Physical Review Letters. 118
We explore the scaling behavior of an unsteady flow that is generated by an oscillating body of finite size in a gas. If the gas is gradually rarefied, the Navier-Stokes equations begin to fail and a kinetic description of the flow becomes more appro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eeb8bd7d889d596f948af1873e124923
https://doi.org/10.1103/physrevlett.118.074505
https://doi.org/10.1103/physrevlett.118.074505
Autor:
Dmitry Krasnov, Victor Yakhot, Janet D. Scheel, Jörg Schumacher, Katepalli R. Sreenivasan, Diego Donzis
Publikováno v:
Proceedings of the National Academy of Sciences. 111:10961-10965
Turbulent flows in nature and technology possess a range of scales. The largest scales carry the memory of the physical system in which a flow is embedded. One challenge is to unravel the universal statistical properties that all turbulent flows shar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7cd6919801d050563fcc8c3d75e2ade3
https://doi.org/10.1073/pnas.1410791111
https://doi.org/10.1073/pnas.1410791111
Publikováno v:
Journal of Fluid Mechanics. 652:65-73
Experimental data on the Reynolds number dependence of the area-averaged turbulent kinetic energy K and dissipation rate ℰ are presented. It is shown that while in the interval ReD > 105 the total kinetic energy scales with friction velocity (K/u*2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cadb092b8d64e2d8b5573a38ad5d389f
https://doi.org/10.1017/s0022112010001497
https://doi.org/10.1017/s0022112010001497