[PDF] Top 20 Large scale effects in turbulence

... spectrum in the large scales for statistically stationary solutions. In the inertial range, the dynamic of the system is often described using the image of the Richardson cascade [ 3 ] where ... Voir le document complet

... Flows in vertical slot fishways are turbulent and present unsteady vortex dynamics in relation to the geometric parameters of the pools (slope and pool geometry) ([1], [8], [9], ...of turbulence with ... Voir le document complet

... transport in the vicinity of the separatrix. These phenomena will be introduced in section ...that turbulence is the main mechanism that allows particles to cross the flux surfaces, indepen- dently ... Voir le document complet

... particles in the ocean is the for- mation of the so-called thin phytoplankton layers (TPL): aggregations of phytoplankton and zooplankton at high concentration with thickness from centimeters to few meters, ... Voir le document complet

... forcing scale is defined as L = π/k f ...tor in the phase ...displayed in Fig. which shows that the large scale con- finement in the vertical direction coexists with a small ... Voir le document complet

... INTRODUCTION. Large eddies – eddies much larger than the integral scale of turbulence – play a central role in the decay of constant density homogeneous turbulence ...detailed in ... Voir le document complet

... “bacterial turbulence” has been used to describe the fast, collective but chaotic motion of swimmers evolv- ing in what remains a very low Reynolds number, inertia- less, world ...[5–8]. In ... Voir le document complet

... diminished in its ...obtained in the limit where they are very dilute, so that individual disturbances of the carrier never pile up nor ...concentrations, large particles interact together through ... Voir le document complet

... gas effects on the large-scale dynamics of decaying homogeneous isotropic turbulence is carried out by using the van der Waals gas ...nonlinearities in the transonic and supersonic flow ... Voir le document complet

... about large values of local H¨older exponents will not affect our study of very irregular ...events. In the sequel, we use the matching function shown in figure 8 to cartography and charac- terize ... Voir le document complet

... phenomenon in- volving plasma flows and a rearrangement of the mag- netic field lines inside a narrow region (the reconnection layer) where topologically different magnetic flux tubes can get interconnected and ... Voir le document complet

... focuses in Optical Interferometry (OI), for which the problem is more difficult than in ...atmospheric turbulence. Second, the number of telescopes in OI arrays is much less than the number of ... Voir le document complet

... gusts in fact exhibit a three dimensional action, but we will obviously (having in mind a simple model for our wind turbine) limit our approach to the along wind fluctuations u ( ) z , t , parallel to the ... Voir le document complet

... studied in our case consists in a closed reactor with positive ...aeration. In figure 1 on the upper left part, the geometry is briefly ...made in two ...The effects of humidity have ... Voir le document complet

... studied in our case consists in a closed reactor with positive ...aeration. In figure 1 on the upper left part, the geometry is briefly ...made in two ...The effects of humidity have ... Voir le document complet

... . In Figure 8, we restrict our obser- vations to the midplane, where the turbulent agitation reaches a ...numbers in the ...forced turbulence exhibit realistic physical properties aside the bump at ... Voir le document complet

... length scale – make us think that bubble-induced agitation mainly results from wake ...These large-scale simulations allow us to overcome the limitations of DNS and to consider thousands of bubbles ... Voir le document complet

... like turbulence diffusing from a plane/point source requires to implement mechanisms of turbulent production that, (i) do not rely on the presence of mean-velocity gradients and, (ii) can be localized in ... Voir le document complet

... shown in figure 11 where u(x, t), u(x) and u ′ (x, t) are reported for d = ...% in a vertical plane located in the middle of the ...clearly in this ...visible in the total fluctuation, ... Voir le document complet

... planning in a virtual world Our first set of tests is performed on a dataset acquired with a virtual multi camera ...signs. In our first experiment, the robot is placed at a position from where four paths ... Voir le document complet