Axial dispersion during low Reynolds number Taylor-Couette flow: intra-vortex mixing effects

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

“…Mass transport in Taylor-Couette flow has been the subject of numerous experimental and numerical studies (Campero and Vigil 1997;Desmet et al 1996a, b;Kataoka et al 1975;Tam and Swinney 1987;Rudman 1998). Two main mechanisms are responsible for mixing: the intravortex mixing related to the velocity field within each vortex and the intervortex mixing related to the characteristics and topology of the flow connecting cellular patterns.…”

“…In their model, the outer zone stands for the well-mixed fluid near boundaries and the inner zone corresponds to the vortex core. More recently, Campero and Vigil (1997) used the same approach as Desmet et al (1996b) and proposed a 3-parameter model which takes into account non-ideal mixing in the inner region.…”

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

“…Both modelling approaches can be used to determine the effective axial dispersion coefficients by matching model prediction to experimental results (Tam and Swinney, 1987). However, even for single-phase systems, simple models are not always suitable, especially at Taylor numbers below the onset of turbulent Taylor vortex flow (Desmet et al, 1996;Campero and Vigil, 1997). In this paper, mathematical models based on species mass balances applied to a near-ideal plugflow reactor are used.…”

“…Such a flow system can be considered as a near-ideal plug-flow reactor (PFR). Many researchers have investigated the axial dispersion in Taylor-Couette flows (Tam and Swinney, 1987;Moore and Cooney, 1995;Desmet et al, 1996;Campero and Vigil, 1997;Ohmura et al, 1997;Rudman, 1998). Experimental observations referenced in the literature (Tam and Swinney, 1987;Ohmura et al, 1997) indicate that axial dispersion decreases to a minimum near the onset of Taylor vortices and increases further as the Taylor number (Ta) increases.…”

Effect of the rotor shape on the mixing characteristics of a continuous flow Taylor-vortex reactor

“…Several studies have been carried out on Taylor-vortex devices in batch mode, i.e. without axial flow, using tracer techniques (Tam and Swinney, 1987;Desmet et al, 1996aDesmet et al, , b, 1997Ohmura et al, 1997;Campero and Vigil, 1997), laser-optical methods (Racina et al, 2005) or chemical test reactions (Liu and Lee, 1999). In contrast to other mass transport models developed, the multi-zone model by Desmet et al (1997) takes into account that the vortices are not always perfectly mixed.…”