[PDF] Top 20 From passive tracer to bubbles dispersion in Taylor-Couette flows

... for Taylor Vortex Flow, Wavy Vortex Flows and fully Turbulent Taylor-Couette ...compared to direct numerical simulations of Navier- Stokes equations coupled to Lagrangian ... Voir le document complet

... of tracer mixing in the Taylor-Couette flow configura- ...diameter to the gap between cylinders ranges from ...0.073 to 0.14. A specific attention has been paid to ... Voir le document complet

... accumulation in outflow regions near the inner ...large bubbles (St ≈ 10 −1 and R b /δ* ≈ ...due to its rotation which is here ...balance in the near wall region to account for ... Voir le document complet

... bubble dispersion in turbulent Taylor-Couette ...is to describe the main mechanisms yielding preferential bubble accumulation in near-wall structures of the ...proceed to ... Voir le document complet

... bubble dispersion, viscous torque, Taylor vortices Abstract This study is an experimental investigation of the interactions between the bubbles, the coherent motion and the viscous drag in a ... Voir le document complet

... high to low particle ...close to uni- form in our experiments, the mixing behavior can hardly be attributed to the gradient diffusion, proving that the main mechanism of interest in our ... Voir le document complet

... corresponding to turbulent regime ranging from 3000 to ...permit to characterize the mean azimuthal velocity, the Taylor vortices contribution and the small-scale turbulent ...data ... Voir le document complet

... indicators in the Taylor Vortex Flow and Wavy Vor- tex Flow ...drawn from the exper- imental results is a clear and systematic enhancement of mixing under two-phase flow ...of tracer. Due ... Voir le document complet

... 318). From left to right ; t = T c , t = 2T c , t = 8T c ...presented in Fig. 4.20 and 4.21 show that the transport of particle tracer between vortices becomes more ...effective. In ... Voir le document complet

... t Taylor–Couette flows between two concentric cylinders have great potential applications in chemical ...superimposed. Taylor–Couette flow is known to evolve towards ... Voir le document complet

... comparable to Murai et al. (2008) [ 8 ], the difference in the geometry ( η larger than in Murai et ...Indeed, in the geom- etry of Murai et ...the bubbles preferentially near the inner ... Voir le document complet

... volume in WVF regime is not straightforward, since its boundaries are evolving due to the traveling wave: Its position and its apparent size vary over time with the passage of the azimuthal ...axial ... Voir le document complet

... axial dispersion and mixing ...observed in WVF regime, the wave induced motion contributes strongly to their volume reduction and partially cancels their ...contribution. In fact, the wave ... Voir le document complet

... high to low particle ...close to uni- form in our experiments, the mixing behavior can hardly be attributed to the gradient diffusion, proving that the main mechanism of interest in our ... Voir le document complet

... longitudinal dispersion coefficient, D k , with decreasing D ⊥ across various incident lattice angles ...scattering from crystalline materials (1) to the transport of active matter in an ... Voir le document complet

... fluorescent tracer consisting of Rhodamine WT was injected for the PLIF ...used to measure the concentration across the meridional plane ðr &xÞ of the gap where x stands for the axial direction and r for ... Voir le document complet

... used to perform RTD measure- ments of an inert ...compared to the electro-chemical method used by Raguin et ...the tracer concentration is monitored by two optical probes placed outside the ... Voir le document complet

... shift from a toroïdal mode to a spiral ...transition from the toroidal to the spiral regimes (Murai et ...distributions in a three-dimensional domain the consequence of two-way ... Voir le document complet

... muthal Couette flow induces a migration of the bubbles to- ward the inner ...rising bubbles develops along the vertical inner ...sets in. The strength of these vortices in- ... Voir le document complet

... bubble dispersion, viscous torque, Taylor vortices Abstract This study is an experimental investigation of the interactions between the bubbles, the coherent motion and the viscous drag in a ... Voir le document complet