4 papers
Numerical investigations around the Gallavotti-Cohen Fluctuation Theorem on Log-lattices
Guillaume Costa, Bérengère Dubrulle
Using the recent concept of fluids projected onto Log-Lattices, we investigate the validity of the Gallavotti-Cohen Fluctuation Theorem (GCFT) in the context of fluid mechanics. Th…
Behind the mirror: the hidden dissipative singular solutions of ideal reversible fluids on log-lattices
Guillaume Costa, Amaury Barral, Adrien Lopez +2
Empirical observations show that turbulence exhibits a broad range of scaling exponents, characterizing how the velocity gradients diverge in the inviscid limit. These exponents ar…
Efficiency of turbulence
A Lopez, A Barral, G Costa +3
We consider the efficiency of turbulence, a dimensionless parameter that characterises the fraction of the input energy stored into a turbulent flow field. We first show that the i…
Viscous and Inviscid Reconnection of Vortex Rings on Logarithmic Lattices
Abhishek Harikrishnan, Adrien Lopez, Bérengère Dubrulle
To address the possible occurrence of a Finite-Time Singularity (FTS) during the oblique reconnection of two vortex rings, Moffatt-Kimura (MK) (J. Fluid Mech., 2019a; J. Fluid Mech…