Axial dispersion in Taylor‐Couette flow

Moore, Christine; Cooney, Charles L.

doi:10.1002/aic.690410329

Cited by 48 publications

(39 citation statements)

References 20 publications

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“…The difference between the response curves was insignificant. This is an indication that the influence of the solute diffusion coefficient can be neglected, as already observed by Moore and Cooney (1995).…”

Section: Resultssupporting

confidence: 51%

Estimation of mass transfer parameters in a Taylor-Couette-Poiseuille heterogeneous reactor

Resende

Vieira

Sousa

et al. 2004

Braz. J. Chem. Eng.

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-A bench-scale, continuous vortex flow reactor (VFR), with a radius ratio, , equal to 0.48 and an aspect ratio, , equal to 11.19 was studied. This reactor may be used in the enzymatic hydrolysis of polypeptides obtained from sweet cheese whey with enzymes immobilized on agarose gel. Operational conditions were 2410 < Re < 11793 and 30-min residence time for glycerol-water, 14% w/w, 27 o C (Re ax = 1.1) and for water, 38 o C (Re ax = 1.5). Residence time distributions (RTDs) were obtained after pulse injections of different tracers (including dyed solid particles). Mass transfer coefficients of a lumpedparameter model of the reactor were estimated from these data. Model fitting to experimental data was accurate. Working conditions were selected so that transport properties of the fluids would be similar to the ones in the actual process at the final stages of whey hydrolysis.

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Section: Resultssupporting

confidence: 51%

Estimation of mass transfer parameters in a Taylor-Couette-Poiseuille heterogeneous reactor

Resende

Vieira

Sousa

et al. 2004

Braz. J. Chem. Eng.

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“…12 and 13. The dispersion based Schmidt number (Sc) shows a general Re −1 trend as proposed by Moore and Cooney (1995). The transition to wavy regimes increases the dispersion coefficient dramatically: 44 enhancement factor from TVF to WVF.…”

Section: Axial Dispersionmentioning

confidence: 97%

“…In the literature, many studies suggest power laws for the evolution of the dispersion coefficient with the Re or Ta numbers (Tam and Swinney, 1987;Moore and Cooney, 1995;Ohmura et al, 1997). In these studies, the authors did not account for important flow parameters, such as the axial and the azimuthal wavelengths.…”

Section: Axial Dispersionmentioning

confidence: 99%

“…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.…”

Section: Introductionmentioning

confidence: 99%

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

Nemri

Climent

Charton

et al. 2013

Chemical Engineering Research and Design

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“…Mixing in Taylor-vortex devices operated in continuous (axial) flow mode has also been the subject of numerous studies (Kataoka et al, 1975;Kataoka and Takigawa, 1981;Enokida et al, 1989;Pudjiono et al, 1992;Moore and Cooney, 1995;Giordano et al, 1998;Yim et al, 1998;Haut et al, 2003;Judat et al, 2004). In continuous flow mode, not only vortex segregation but also bypass effects and vortex slowdown can be observed.…”

Section: Introductionmentioning

confidence: 99%

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

Richter

Hoffmann

Kraushaar‐Czarnetzki

2008

Chemical Engineering Science

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Macro-and micromixing in a continuous flow Taylor-vortex reactor with novel ribbed rotors were investigated and compared to the features of a classical cylindrical rotor. The characterisation was performed in a wide hydrodynamic range (40 < Ta < 2500 and 0.03 < Re < 0.51) through tracer experiments and the analysis of the rotor power consumption. Additionally, the flow patterns were visualised by using a rheoscopic fluid. The results show that the novel rotors equipped with ribs immobilise and stabilise the vortices. As compared to cylindrical rotors, micromixing is clearly enhanced while axial dispersion can be simultaneously reduced. Through the use of ribbed rotors, the operational window can be broadened considerably, in which the reactor runs at very low or moderate extent of macromixing.

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Axial dispersion in Taylor‐Couette flow

Cited by 48 publications

References 20 publications

Estimation of mass transfer parameters in a Taylor-Couette-Poiseuille heterogeneous reactor

Estimation of mass transfer parameters in a Taylor-Couette-Poiseuille heterogeneous reactor

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

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

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