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Chaos and Mixing in NETmix
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  • Joana Matos,
  • Ricardo Santos,
  • Madalena Dias,
  • José Carlos Lopes
Joana Matos
Faculdade de Engenharia da Universidade do Porto

Corresponding Author:[email protected]

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Ricardo Santos
Faculdade de Engenharia da Universidade do Porto
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Madalena Dias
Faculdade de Engenharia da Universidade do Porto
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José Carlos Lopes
Universidade do Porto Faculdade de Engenharia
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Abstract

NETmix is a network of mixing chambers interconnected by channels, in which the most efficient mixing occurs under chaotic flow regimes. Chaos is highly influenced by the topology, particularly by the ratio chamber diameter/channel width, D/d. In this work, micromixing in NETmix is characterized through Lagrangian Mixing Simulation (LMS), which enables to establish the relation between the degree of mixing and the topology, D/d. The degree of mixing is then related with the Eulerian chaoticity from hydrodynamics and spectral analysis. The best mixing is obtained at D/d = 6.65 and is associated to a thin 8 shaped strange attractor. The spectral analysis shows a principal oscillation frequency at St = 0.13. Since the quasi-periodic regime is alternated with chaotic behaviour, NETmix has an intermittent bifurcation. For the NETmix system, orderly flows in the quasi-periodic regime have higher mixing intensity than less orderly flows in the weak or strong chaotic regimes.
Submitted to AIChE Journal
26 Jan 2024Review(s) Completed, Editorial Evaluation Pending
31 Jan 2024Editorial Decision: Revise Major
15 Feb 20241st Revision Received
16 Feb 2024Submission Checks Completed
16 Feb 2024Assigned to Editor
16 Feb 2024Review(s) Completed, Editorial Evaluation Pending
02 Apr 2024Editorial Decision: Accept