Zobrazeno 1 - 10
of 195
pro vyhledávání: '"Krstulovic, Giorgio"'
Autor:
Stasiak, Piotr Z., Xing, Yiming, Alihosseini, Yousef, Barenghi, Carlo F., Baggaley, Andrew, Guo, Wei, Galantucci, Luca, Krstulovic, Giorgio
The minimum separation between reconnecting vortices in fluids and superfluids obeys a universal scaling law with respect to time. The pre-reconnection and the post-reconnection prefactors of this scaling law are different, a property related to irre
Externí odkaz:
http://arxiv.org/abs/2411.08942
We show that the Gross-Pitaevskii equation coupled with the wave equation for a wire (GP-W) provides a natural theoretical framework for understanding recent experiments employing a nanowire to detect a single quantum vortex in superfluid $^4 {\rm He
Externí odkaz:
http://arxiv.org/abs/2410.06650
Bogoliubov waves are fundamental excitations of Bose-Einstein Condensates (BECs). They emerge from a perturbed ground state and interact nonlinearly, triggering turbulent cascades. Here, we study turbulent BECs theoretically and numerically using the
Externí odkaz:
http://arxiv.org/abs/2408.15163
We construct a $d$-dimensional Eddy Damped Quasi-Normal Markovian (EDQNM) Closure Model to study dynamo action in arbitrary dimensions. In particular, we find lower $d_L$ and upper $d_U$ critical dimensions for sustained dynamo action in this incompr
Externí odkaz:
http://arxiv.org/abs/2408.01266
We study the statistics of longitudinal and transverse structure functions, as well as velocity circulation in the inverse energy cascade of two-dimensional turbulence. By means of direct numerical simulations of the incompressible Navier-Stokes equa
Externí odkaz:
http://arxiv.org/abs/2408.00631
Internal gravity waves are an essential feature of flows stratified media, such as oceans and atmospheres. To investigate their dynamics, we perform simulations of the forced-dissipated kinetic equation describing the evolution of the energy spectrum
Externí odkaz:
http://arxiv.org/abs/2407.11469
Autor:
Labarre, Vincent, Lanchon, Nicolas, Cortet, Pierre-Philippe, Krstulovic, Giorgio, Nazarenko, Sergey
Publikováno v:
J. Fluid Mech. 998 (2024) A17
We present a new derivation of the kinetic equation for weak, non-hydrostatic internal gravity wave turbulence. The equation is equivalent to the one obtained by Caillol & Zeitlin (2000), but it takes a canonical form. We show that it conserves the e
Externí odkaz:
http://arxiv.org/abs/2311.14370
Autor:
Stasiak, Piotr Z., Baggaley, Andrew W., Krstulovic, Giorgio, Barenghi, Carlo F., Galantucci, Luca
The reciprocal energy and enstrophy transfers between normal fluid and superfluid components dictate the overall dynamics of superfluid $^4$He including the generation, evolution and coupling of coherent structures, the distribution of energy among l
Externí odkaz:
http://arxiv.org/abs/2310.05826
Autor:
Krstulovic, Giorgio, Nazarenko, Sergey
In this work, we study numerically the temporal evolution of an initially random large-scale velocity field under governed by the hyperviscous incompressible Navier-Stoke equations. Three stages are clearly observed during the evolution. First, the i
Externí odkaz:
http://arxiv.org/abs/2310.01121
We study the statistics of velocity circulation in two-dimensional classical and quantum turbulence. We perform numerical simulations of the incompressible Navier-Stokes and the Gross-Pitaevskii (GP) equations for the direct and inverse cascades. Our
Externí odkaz:
http://arxiv.org/abs/2306.17735