Zobrazeno 1 - 10
of 5 211
pro vyhledávání: '"Alexakis A"'
We show that an inverse scattering problem for a semilinear wave equation can be solved on a manifold having an asymptotically Minkowskian infinity, that is, scattering functionals determine the topology, differentiable structure and the conformal ty
Externí odkaz:
http://arxiv.org/abs/2411.09354
Autor:
Alexakis, Alexandros
Many fluid-dynamical systems met in nature are quasi-two-dimensional: they are constrained to evolve in approximately two dimensions with little or no variation along the third direction. This has a drastic effect in the flow evolution because the pr
Externí odkaz:
http://arxiv.org/abs/2411.08633
Autor:
Alexakis, Alexandros, Marino, Raffaele, Mininni, Pablo D., van Kan, Adrian, Foldes, Raffaello, Feraco, Fabio
How turbulent convective fluctuations organise to form large-scale structures in planetary atmospheres remains a question that eludes quantitative answers. The assumption that this process is the result of an inverse cascade was suggested half a cent
Externí odkaz:
http://arxiv.org/abs/2411.08427
We obtain existence and local uniqueness of asymptotically flat, static vacuum extensions for Bartnik data on a sphere near the data of a sphere of symmetry in a Schwarzschild manifold.
Comment: 17 pages
Comment: 17 pages
Externí odkaz:
http://arxiv.org/abs/2411.02802
Explaining fast magnetic reconnection in electrically conducting plasmas has been a theoretical challenge in plasma physics since its first description by Eugene N. Parker. In the recent years the observed reconnection rate has been shown by numerica
Externí odkaz:
http://arxiv.org/abs/2406.08951
Autor:
Alexakis, Spyros
We study the complete electrode model boundary condition for second order elliptic PDE. A specific case of this is the PDE describing the electrostatic potential for a conductive body into which current is injected through electrodes that touch the b
Externí odkaz:
http://arxiv.org/abs/2404.04336
It has long been conjectured that, in three dimensional turbulence, velocity modes at scales larger than the forcing scale follow equilibrium dynamics. Recent numerical and experimental evidence show that such modes share the same mean energy and the
Externí odkaz:
http://arxiv.org/abs/2311.14440
It has long been understood that dilute samples of chiral molecules such as rarefied gases should exhibit Rayleigh optical activity. We extend the existing theory by accounting for molecular dynamics and correlations, thus obtaining a more general th
Externí odkaz:
http://arxiv.org/abs/2310.18352
Autor:
Ajzner, Ben, Alexakis, Alexandros
Reproducing complex phenomena with simple models marks our understanding of the phenomena themselves and this is what Jack Herring's work demonstrated multiple times. In that spirit, this work studies a turbulence shell model consisting of a hierarch
Externí odkaz:
http://arxiv.org/abs/2307.15505
Autor:
Alexakis, Alexandros
How locally injected turbulence, spreads in space is investigated with direct numerical simulations. We consider a turbulent flow in a long channel generated by a forcing that is localised in space. The forcing is such that it does not inject any mea
Externí odkaz:
http://arxiv.org/abs/2307.08469