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Mixed-mode oscillations in a homogeneous pH-oscillatory chemical reaction system

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F08%3A00020773" target="_blank" >RIV/60461373:22340/08:00020773 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Mixed-mode oscillations in a homogeneous pH-oscillatory chemical reaction system

  • Original language description

    We examine experimentally a chemical system in a flow-through stirred reactor, which is known to provide large-amplitude oscillations of the pH value. By systematic variation of the flow rate we find that the system displays hysteresis between a steady state and oscillations, and more interestingly, a transition to chaos involving mixed-mode oscillations. The basic pattern of the measured pH in the mixed-mode regime includes a large-scale peak followed by a series of oscillations on a much smaller scale, which are usually highly irregular and of variable duration. The bifurcation diagram shows that chaos sets in via a period-doubling route observed on the large-amplitude scale, but simultaneously the small-amplitude oscillations are involved. Beyond the apparent accumulation of period doubling bifurcations, a mixed-mode regime with irregular oscillations on both scales is observed, occasionally interrupted by windows of periodicity. As the flow rate is further increased, chaos turns in

  • Czech name

    Smíšené oscilace v homogenní pH-oscilační chemické reakci

  • Czech description

    Byla provedena experimentální studie chemického systému v průtočném míchaném reaktoru, o níž je známo, že vykazuje velko-amplitudové oscilace pH. Bylo zjištěno, že při systematické změně průtočné rychlosti systém vykazuje hysterezi a oscilace, a zejménapřechod k chaosu zahrnující smíšené oscilace. Dynamika typických pozorovaných režimů byla studována pomocí nelineární analýzy časových řad, která zahrnuje rekonstrukci atraktoru ve fázovém prostoru a výpočet maximálního Ljapunovova exponenty. Analýza ukazuje na deterministický chaos, který se objevuje prostřednictvím kaskády zdvojení period oscilací z jedné strany a přechodem přes kvaziperiodicitu ze strany druhé.

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/GA203%2F06%2F1269" target="_blank" >GA203/06/1269: Stability and dynamics of reaction networks in homogeneous and heterogeneous chemical reactors</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

    CHAOS

  • ISSN

    1054-1500

  • e-ISSN

  • Volume of the periodical

    8

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    1

  • Pages from-to

  • UT code for WoS article

    000254536700032

  • EID of the result in the Scopus database