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Onsager's 'ideal turbulence'theory
G Eyink - Journal of Fluid Mechanics, 2024 - cambridge.org
In 1945–1949, Lars Onsager made an exact analysis of the high-Reynolds-number limit for
individual turbulent flow realisations modelled by incompressible Navier–Stokes equations …
individual turbulent flow realisations modelled by incompressible Navier–Stokes equations …
On anomalous dissipation induced by transport noise
A Agresti - arxiv preprint arxiv:2405.03525, 2024 - arxiv.org
In this paper, we show that suitable transport noises produce anomalous dissipation of
enstrophy and energy of solutions of the 2D Navier-Stokes equations and diffusion …
enstrophy and energy of solutions of the 2D Navier-Stokes equations and diffusion …
Dissipative Euler flows originating from circular vortex filaments
In this paper, we prove the first existence result of weak solutions to the 3D Euler equation
with initial vorticity concentrated in a circle and velocity field in $ C ([0, T], L^{2^-}) $. The …
with initial vorticity concentrated in a circle and velocity field in $ C ([0, T], L^{2^-}) $. The …
Anomalous and total dissipation due to advection by solutions of randomly forced Navier-Stokes equations
We propose a novel approach to induce anomalous dissipation through advection driven by
turbulent fluid flows. Specifically, we establish the existence of a velocity field $ v $ satisfying …
turbulent fluid flows. Specifically, we establish the existence of a velocity field $ v $ satisfying …
Anomalous Regularization in Kraichnan's Passive Scalar Model
We consider the advection of a passive scalar by a divergence free random Gaussian field,
white in time and H\" older regular in space (rough Kraichnan's model), a well established …
white in time and H\" older regular in space (rough Kraichnan's model), a well established …
Nonuniqueness of trajectories on a set of full measure for sobolev vector fields
A Kumar - Archive for Rational Mechanics and Analysis, 2024 - Springer
In this paper, we resolve an important long-standing question of Alberti (Rend Lincei 23: 477–
491, 2012) that asks whether or not if there is a continuous vector field with bounded …
491, 2012) that asks whether or not if there is a continuous vector field with bounded …
Dissipation anomaly and anomalous dissipation in incompressible fluid flows
A Cheskidov - arxiv preprint arxiv:2311.04182, 2023 - arxiv.org
Dissipation anomaly, a phenomenon predicted by Kolmogorov's theory of turbulence, is the
persistence of a non-vanishing energy dissipation for solutions of the Navier-Stokes …
persistence of a non-vanishing energy dissipation for solutions of the Navier-Stokes …
Dissipation enhancing properties for a class of Hamiltonian flows with closed streamlines
We study the evolution of a passive scalar subject to molecular diffusion and advected by an
incompressible velocity field on a 2D bounded domain. The velocity field is u=∇⊥ H, where …
incompressible velocity field on a 2D bounded domain. The velocity field is u=∇⊥ H, where …
Accelerated relaxation enhancing flows cause total dissipation
K Rowan - arxiv preprint arxiv:2401.15001, 2024 - arxiv.org
We show that by" accelerating" relaxation enhancing flows, one can construct a flow that is
smooth on $[0, 1)\times\mathbb {T}^ d $ but highly singular at $ t= 1$ so that for any positive …
smooth on $[0, 1)\times\mathbb {T}^ d $ but highly singular at $ t= 1$ so that for any positive …
On vanishing diffusivity selection for the advection equation
G Mescolini, J Pitcho, M Sorella - Annali di Matematica Pura ed Applicata …, 2025 - Springer
We study the advection equation along vector fields singular at the initial time. More
precisely, we prove that for divergence-free vector fields in\(L^ 1_ {loc}((0, T]; BV (\mathbb …
precisely, we prove that for divergence-free vector fields in\(L^ 1_ {loc}((0, T]; BV (\mathbb …