Nous réunissons ici quelques travaux sur le mélange pour lesquels le scalaire est passif (donc sa vitesse est égale à celle du fluide, avec un éventuel déplacement supplémentaire dû à la diffusion) ; le scalaire peut être la température. Les travaux concernant les particules de taille finie sont à retrouver sur la page "Transport de particules".
Personnel principalement impliqué : Wouter Bos
Collaborations : Robert Rubinstein, Le Fang, Benjamin Kadoch, Kai Schneider
Publications associées :
 Article dans Phys. Rev. E (2020) Efficiency of laminar and turbulent mixing in wall-bounded flowsBenjamin Kadoch, Wouter Bos & Kai Schneider
A turbulent flow mixes in general more rapidly a passive scalar than a laminar flow does. From an energetic point of view, for statistically homogeneous or periodic flows, the laminar regime is (...) |
 Article dans Fluid Dyn. Res. (2019) Passive scalar mixing in modulated turbulenceYuyao Yang, Robert Chahine, Robert Rubinstein & Wouter JT Bos
We investigate the mixing of a passive scalar in an isotropic turbulent flow in the presence of a time-periodic forcing. The results corroborate recent analytical predictions on the frequency (...) |
 Article dans Phys. Rev. Fluids (2017) Directional change of fluid particles in two-dimensional turbulence and of football playersBenjamin Kadoch, Wouter J. T. Bos, and Kai Schneider
Multiscale directional statistics are investigated in two-dimensional incompressible turbulence. It is shown that the short-time behavior of the mean angle of directional change of fluid (...) |
 Article dans Comput. Fluids (2017) Mixing in modulated turbulence. Analytical resultsWouter J.T. Bos, Robert Rubinstein
Recent numerical results show that if a scalar is mixed by periodically forced turbulence, the average mixing rate is directly affected for forcing frequencies small compared to the integral (...) |
 Article dans J. Fluid Mech. (2016) Spectral modelling for passive scalar dynamics in homogeneous anisotropic turbulenceAntoine Briard, Thomas Gomez & Claude Cambon
The present work aims at developing a spectral model for a passive scalar field and its associated scalar flux in homogeneous anisotropic turbulence. This is achieved using the paradigm of (...) |
 Article dans Phys. Fluids (2015) On the scaling of temperature fluctuations induced by frictional heatingWouter J. T. Bos, Robert Chahine & Andrey V. Pushkarev
The temperature fluctuations generated by viscous dissipation in an isotropic turbulent flow are studied using direct numerical simulation. It is shown that their scaling with Reynolds number is (...) |
 Article dans Phys. Rev. letters (2015) Angular statistics of Lagrangian trajectories in turbulenceWouter J. T. Bos, Benjamin Kadoch & Kai Schneider
The angle between subsequent particle displacement increments is evaluated as a function of the time lag in isotropic turbulence. It is shown that the evolution of this angle contains two (...) |
 Article dans Phys. Rev. E (2015) Dependence of turbulent advection on the Lagrangian correlation timeWouter J. T. Bos & Le Fang
In turbulent scalar mixing, starting from random initial conditions, the root-mean-square advection term rapidly drops as the flow and the scalar field organize. We show first analytically, for (...) |
 Article dans J. Fluid Mech. (2014) The temperature spectrum generated by frictional heating in isotropic turbulenceWouter J. T. Bos
In every turbulent flow with non-zero viscosity, heat is generated by viscous friction. This heat is then mixed by the velocity field. We consider how heat fluctuations generated in this way are (...) |
 Article dans J. Fluid Mech. (2014) On the anisotropy of the turbulent passive scalar in the presence of a mean scalar gradientWouter J. T. Bos
We investigate the origin of the scalar gradient skewness in isotropic turbulence on which a mean scalar gradient is imposed. The problem of the advection of an anisotropic scalar field is (...) |