Qualitative relation between reflected light intensity by Kalliroscope flakes and velocity field in the Couette–Taylor flow system

PIV Study of the Flow Across the Meridional Plane of Rotating Cylinders with Wide Gap

“…The difference in the magnitude between the axial velocity near the wall of the inner cylinder and that near the wall of the outer cylinder is observed to be small, indicating that there is a balance in the net axial flow along both walls. Figure 7 displays the normalised radial velocity profile at = + 0.5 , which has been the radial coordinate of choice for most of the radial velocity profiles reported in the open literature, such as the ones reported in [26]- [27]. The profile exhibits a periodic trend along the axial direction that is consistent with the one reported in previous work [26]- [27].…”

“…Figure 7 displays the normalised radial velocity profile at = + 0.5 , which has been the radial coordinate of choice for most of the radial velocity profiles reported in the open literature, such as the ones reported in [26]- [27]. The profile exhibits a periodic trend along the axial direction that is consistent with the one reported in previous work [26]- [27]. Approximately four cycles of a periodic oscillation along / are shown in figure 7.…”

“…The velocity profile along the gap mid-span of the annulus has been a focus of interest in most of the previous studies on the Taylor vortex flow including [26] and [27]. To the best of the authors' knowledge, no previous study has reported the velocity distribution at radial positions near the wall of the inner cylinder and near the wall of the outer cylinder.…”

Application of the Particle Image Velocimetry to the Couette-Taylor Flow

“…The velocity fields were computed using the intercorrelation function, which is implemented in the software "Corelia-V2IP" (Tecflow). The PIV measurements were performed in the CCF, in the TVF and WVF regimes in order to calibrate our data acquisition system and to fit data available in the literature for these regimes (Wereley et al 1994, Wereley et al 1998, Abcha et al 2008). …”

“…The application of PIV in the Couette-Taylor system with a fixed outer cylinder was first performed by Wereley & Lueptow (Wereley et al, 1994 followed later by few authors. The question of correlation between velocimetry data and qualitative structure given by anisotropic reflective particles in the Couette-Taylor flow was addressed only recently (Gauthier et al, 1998;Abcha et al, 2008). However, many questions connected with the interpretation of results obtained by different techniques have not been answered.…”