OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Experimental investigation of mixing and axial dispersion in Taylor–Couette flow patterns

Nemri, Marouan and Cazin, Sébastien and Charton, Sophie and Climent, Éric Experimental investigation of mixing and axial dispersion in Taylor–Couette flow patterns. (2014) Experiments in Fluids, 55 (1769). 1-16. ISSN 0723-4864

(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader

Official URL: http://dx.doi.org/10.1007/s00348-014-1769-6


The flow and mixing in a Taylor–Couette device have been characterized by means of simultaneous particle image velocimetry and planar laser-induced fluorescence (PLIF) measurements. Concentration of a passive tracer measurements was used to investigate mixing efficiency for different flow patterns (from steady Taylor vortex flow to modulated wavy vortex flow, MWVF). Taylor–Couette flow is known to evolve toward turbulence through a sequence of flow instabilities. Macroscopic quantities, such as axial dispersion and mixing index, are extremely sensitive to internal flow structures. PLIF measurements show clear evidences of different transport mechanisms including intravortex mixing and tracer fluxes through neighboring vortices. Under WVF and MWVF regimes, intravortex mixing is controlled by chaotic advection, due to the 3D nature of the flow, while intervortex transport occurs due to the presence of waves between neighboring vortices. The combination of these two mechanisms results in enhanced axial dispersion. We show that hysteresis may occur between consecutive regimes depending on flow history, and this may have a significant effect on mixing for a given Reynolds number

Item Type:Article
Additional Information:Thanks to Springer editor. The definitive version is available at : http://link.springer.com/ The original PDF of the article can be found at : http://link.springer.com/article/10.1007%2Fs00348-014-1769-6
HAL Id:hal-01304049
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:19 Apr 2016 07:23

Repository Staff Only: item control page