Turbulence - "motion of multitude": a multi-agent spin model for complex flows (2009)
Vidgop, Alexander Jonathan, Fouxon, Itzhak
We propose a new paradigm for emergence of macroscopic flows. The latter are considered as a collective phenomenon created by many agents that exchange abstract information. The information exchange...
Exact Scaling Relations In Relativistic Hydrodynamic Turbulence (2009)
We consider the steady state statistics of turbulence in general classes of dissipative hydrodynamic equations, where the fluctuations are sustained by a random source concentrated at large scales....
New relations for correlation functions in Navier-Stokes turbulence (2009)
Falkovich, Gregory, Fouxon, Itzhak, Oz, Yaron
We consider the steady-state statistics of turbulence sustained by a large-scale force. The Kolmogorov flux relation (4/5-law) is shown to be a particular case of the general relation on the...
Web as a fundamental universal system (2009)
Vidgop, Alexander Jonathan, Fouxon, Itzhak
We study the possibility that further advancement in the understanding of the order of chaos may demand a certain reconsideration of the approach to the classical mechanics. For this we suggest to...
The Incompressible Navier-Stokes Equations From Black Hole Membrane Dynamics (2009)
Eling, Christopher, Fouxon, Itzhak, Oz, Yaron
We consider the dynamics of a d+1 space-time dimensional membrane defined by the event horizon of a black brane in (d+2)-dimensional asymptotically Anti-de-Sitter space-time and show that it is...
CFT Hydrodynamics: Symmetries, Exact Solutions and Gravity (2008)
We consider the hydrodynamics of relativistic conformal field theories at finite temperature and its slow motions limit, where it reduces to the incompressible Navier-Stokes equations. The symmetries...
Finite-time collapse and soliton-like states in the dynamics of dissipative gases (2008)
A study of the gas dynamics of a dilute collection of the inelastically colliding hard spheres is presented. When diffusive processes are neglected the gas density blows up in a finite time. The...
We consider the hydrodynamics of relativistic conformal field theories at finite temperature. We show that the limit of slow motions of the ideal hydrodynamics leads to the non-relativistic...
Radiation entropy bound from the second law of thermodynamics (2008)
It has been suggested heuristically by Unruh and Wald, and independently by Page, that among systems with given energy and volume, thermal radiation has the largest entropy. The suggestion leads to...
The bound on viscosity and the generalized second law of thermodynamics (2007)
Fouxon, Itzhak, Betschart, Gerold, Bekenstein, Jacob D.
We describe a new paradox for ideal fluids. It arises in the accretion of an \textit{ideal} fluid onto a black hole, where, under suitable boundary conditions, the flow can violate the generalized...
Puglisi, Andrea, Assaf, Michael, Fouxon, Itzhak, Meerson, Baruch
It has been recently shown (Fouxon et al. 2007) that, in the framework of ideal granular hydrodynamics (IGHD), an initially smooth hydrodynamic flow of a granular gas can produce an infinite gas...
Meerson, Baruch, Fouxon, Itzhak, Vilenkin, Arkady
We use hydrodynamics to investigate non-stationary channel flows of freely cooling dilute granular gases. We focus on the regime where the sound travel time through the channel is much shorter than...
We study the motion of small particles in a random turbulent flow assuming linear law of friction. We derive a symmetry relation obeyed by the large deviations of the finite time Lyapunov exponents...
Fouxon, Itzhak, Meerson, Baruch, Assaf, Michael, Livne, Eli
We employ granular hydrodynamics to investigate a paradigmatic problem of clustering of particles in a freely cooling dilute granular gas. We consider large-scale hydrodynamic motions where the...
Formation and evolution of density singularities in hydrodynamics of inelastic gases (2006)
Fouxon, Itzhak, Meerson, Baruch, Assaf, Michael, Livne, Eli
We use ideal hydrodynamics to investigate clustering in a gas of inelastically colliding spheres. The hydrodynamic equations exhibit a new type of finite-time density blowup, where the gas pressure...