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Macro-instability: a chaotic flow component in stirred tanks

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F08%3A00020786" target="_blank" >RIV/60461373:22340/08:00020786 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Macro-instability: a chaotic flow component in stirred tanks

  • Original language description

    Chaotic features of the macro-instability (MI) of flow patterns in stirred tanks are studied in this paper. Datasets obtained by measuring the axial component of the fluid velocity and the tangential force affecting the baffles are used. Two geometrically identical, flatbottomed cylindrical mixing tanks (diameter of 0.3 m) stirred with either pitched blade turbine impellers or Rushton turbine impeller are used in the experiments, and water and aqueous glycerol solutions are used as the working liquids.First, the presence of the MI component in the data is examined by spectral analysis. Then, the MI components are identified in the data using the proper orthogonal decomposition (POD) technique. The attractors of the macro-instability are reconstructedusing either the POD eigenmodes or a method of delays and finally the attractor invariants are evaluated. The dependence of the correlation dimension and maximum Lyapunov exponent on the vessel operational conditions is determined togethe

  • Czech name

    Makro-nestabilita: chotická složka toku kapaliny v míchacích nádobách

  • Czech description

    Jsou studovány chaotické aspekty makro-nestabilitních komponent toku kapaliny v míchacích nádobách. Experimentální data pocházejí z cylindrických míchacích nádob s plochým dnem promíchávaných buďto lopatkovým nebo turbinovým míchadlem. Jsou použita datarůzné fyzikální podstaty ? rychlostní data a síly působící na narážky. Jsou rekonstruovány chaotické atraktory makro-nestabilitních složek dat a určeny hodnoty jejich chaotických invariantů v závislosti na geometrických a provozních parametrech míchací nádoby.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CI - Industrial chemistry and chemical engineering

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/GA104%2F05%2F2500" target="_blank" >GA104/05/2500: Flow macro-instability in stirred vessels: experimental studies, description and modelling</a><br>

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2008

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Philosophical Transactions of Royal Society A

  • ISSN

    1364-503X

  • e-ISSN

  • Volume of the periodical

    366

  • Issue of the periodical within the volume

    1864

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    10

  • Pages from-to

  • UT code for WoS article

    000251927300009

  • EID of the result in the Scopus database