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Spatial distribution of energy dissipation intensity in gas-liquid dispersion agitated by various impellers

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F05%3A00014648" target="_blank" >RIV/60461373:22340/05:00014648 - isvavai.cz</a>

  • Alternative codes found

    RIV/67985858:_____/05:00028643

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Spatial distribution of energy dissipation intensity in gas-liquid dispersion agitated by various impellers

  • Original language description

    The spatial distribution of the energy dissipation rate in a stirred gas-liquid dispersion is studied experimentally. The local values of the energy dissipation rate are determined from the velocity data obtained by means of constant temperature anemometry (CTA). This method is based on the cooling effect of a flow on a small heated body, providing continuous velocity time series. The processing technique divides the measured velocity signal in parts corresponding to bubbles and to continuous phase. Thecontinuous-phase data are statistically processed to get the mean and fluctuation velocity components in all three directions and the kinetic energy of turbulence. The results are presented for bubbly air-water dispersions stirred by Rushton turbine, pitched blade impeller and Techmix 335 impeller. The turbulent characteristics in gas-liquid dispersions are compared with those measured in liquid phase.

  • Czech name

    Prostorové rozložení intenzity disipace energie v nádobě míchané různými typy míchadel

  • Czech description

    Je experimentálně studováno prostorové rozložení intenzity disipace energie při různých intenzitách míchání a při použití různých typů míchadel. Data jsou vyhodnocována rovněž pro podmínky s aerací kapaliny. Je testována metodika eliminace částí signáluanemometrické sondy zkreslených interakcí s bublinami plynu. Porovnání integrálu disipované energie přes celý objem nádoby s hodnotami příkonu míchadla ukazuje, že eliminace zkreslených částí signálu není zcela správná.

Classification

  • Type

    D - Article in proceedings

  • CEP classification

    CI - Industrial chemistry and chemical engineering

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2005

  • Confidentiality

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

Data specific for result type

  • Article name in the collection

    Proc. of 32th International Conference of Slovak Society of Chemical Engineering.

  • ISBN

    80-227-2224-3

  • ISSN

  • e-ISSN

  • Number of pages

    9

  • Pages from-to

  • Publisher name

    Slovak University of Technology

  • Place of publication

    Bratislava

  • Event location

    Tatranské Matliare, Slovensko

  • Event date

    May 23, 2005

  • Type of event by nationality

    WRD - Celosvětová akce

  • UT code for WoS article