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pro vyhledávání: '"Polanco, Juan Ignacio"'
Autor:
Polanco, Juan Ignacio
The Biot-Savart law is relevant in physical contexts including electromagnetism and fluid dynamics. In the latter case, when the rotation of a fluid is confined to a set of very thin vortex filaments, this law describes the velocity field induced by
Externí odkaz:
http://arxiv.org/abs/2406.07366
Publikováno v:
Phys. Rev. Fluids 8, 034602 (2023)
Geophysical flows are often turbulent and subject to rotation. This rotation modifies the structure of turbulence and is thereby expected to sensibly affect its Lagrangian properties. Here, we investigate the relative dispersion and geometry of pairs
Externí odkaz:
http://arxiv.org/abs/2205.06700
Publikováno v:
Nat. Commun. 12, 7090 (2021)
The understanding of turbulent flows is one of the biggest current challenges in physics, as no first-principles theory exists to explain their observed spatio-temporal intermittency. Turbulent flows may be regarded as an intricate collection of mutu
Externí odkaz:
http://arxiv.org/abs/2107.03335
Autor:
Polanco, Juan Ignacio
La perspective lagrangienne, décrivant un écoulement selon les trajectoires de traceurs fluides, est une approche naturelle pour étudier les phénomènes de dispersion dans les écoulements turbulents. En turbulence de paroi, le mouvement des trac
Externí odkaz:
http://www.theses.fr/2019LYSE1043/document
Publikováno v:
Phys. Rev. X 11, 011053 (2021)
The velocity circulation, a measure of the rotation of a fluid within a closed path, is a fundamental observable in classical and quantum flows. It is indeed a Lagrangian invariant in inviscid classical fluids. In quantum flows, circulation is quanti
Externí odkaz:
http://arxiv.org/abs/2010.07875
Publikováno v:
Phys. Rev. Lett. 125, 254504 (2020)
Finite-temperature quantum turbulence is often described in terms of two immiscible fluids that can flow with a non-zero mean relative velocity. Such out-of-equilibrium state is known as counterflow superfluid turbulence. We report here the emergence
Externí odkaz:
http://arxiv.org/abs/2005.10106
Publikováno v:
Phys. Rev. Fluids 5, 032601 (2020)
Particles are today the main tool to study superfluid turbulence and visualize quantum vortices. In this work, we study the dynamics and the spatial distribution of particles in co-flow and counterflow superfluid helium turbulence in the framework of
Externí odkaz:
http://arxiv.org/abs/1910.08444
Autor:
Polanco, Juan Ignacio, Vinkovic, Ivana, Stelzenmuller, Nickolas, Mordant, Nicolas, Bourgoin, Mickaël
Publikováno v:
Int. J. Heat Fluid Flow 71 (2018) 231-245
Lagrangian tracking of particle pairs is of fundamental interest in a large number of environmental applications dealing with contaminant dispersion and passive scalar mixing. The aim of the present study is to extend the observations available in th
Externí odkaz:
http://arxiv.org/abs/1804.04562
Autor:
Stelzenmuller, Nickolas, Polanco, Juan Ignacio, Vignal, Laure, Vinkovic, Ivana, Mordant, Nicolas
Publikováno v:
Phys. Rev. Fluids 2, 054602 (2017)
Lagrangian acceleration statistics in a fully developed turbulent channel flow at $Re_\tau = 1440$ are investigated, based on tracer particle tracking in experiments and direct numerical simulations. The evolution with wall distance of the Lagrangian
Externí odkaz:
http://arxiv.org/abs/1704.07186
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