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Segregated Regions in Continuous Laminar Stirred Tank Reactors by P.E. Arratia; J.P. Lacombe; T. Shinbrot; F.J. Muzzio is a Engineering article available to read on EtoBox.

What is Segregated Regions in Continuous Laminar Stirred Tank Reactors about?

Using visualization techniques, including acid/base reactions and UV uorescence, we provide experimental evidence of segregated regions (islands) during mixing of viscous Newtonian uids under laminar ow conditions in continuous stirred tank reactors (CSTRs). The e ect of inlet/outlet stream position and Reynolds number on the dynamics of the mixing processes is examined. Numerical experiments in 3-D map were able to capture the main features of the CSTR ow by perturbing a Batch system using an imposed axial ow. Asymmetric ow patterns produced by o -center positioning of inlet and outlet pipes cause a reduction in size of the segregated region, enlarging the chaotic region and leading to more e cient mixing. Under dynamic inlet ow conditions, the laminar steady ow is perturbed, giving rise to an asymmetric ow pattern that is able to destroy toroidal segregated regions. Counter-intuitively, higher agitation speed (higher Re) did not enhance overall mixing e ciency. Faster agitation stabilized the toroidal regions, making it harder to destroy them. In addition, dynamic mixing protocols are investigated to enhance mixing performance. We demonstrate that time-dependent pumping and stirr

Who reads Segregated Regions in Continuous Laminar Stirred Tank Reactors?

Author

P.E. Arratia; J.P. Lacombe; T. Shinbrot; F.J. Muzzio

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0009-2509)

Published

2004

Language

EN

Field

Engineering (Physical Sciences)