Vše

Co hledáte?

Vše
Projekty
Výsledky výzkumu
Subjekty

Rychlé hledání

  • Projekty podpořené TA ČR
  • Významné projekty
  • Projekty s nejvyšší státní podporou
  • Aktuálně běžící projekty

Chytré vyhledávání

  • Takto najdu konkrétní +slovo
  • Takto z výsledků -slovo zcela vynechám
  • “Takto můžu najít celou frázi”

Local Turbulent Energy Dissipation Rate in an Agitated Vessel: Experimental and Turbulence Scaling

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24620%2F18%3A00005856" target="_blank" >RIV/46747885:24620/18:00005856 - isvavai.cz</a>

  • Nalezeny alternativní kódy

    RIV/67985874:_____/18:00484246 RIV/68407700:21220/18:00321434

  • Výsledek na webu

    <a href="https://link.springer.com/content/pdf/10.1134/S0040579518010037.pdf" target="_blank" >https://link.springer.com/content/pdf/10.1134/S0040579518010037.pdf</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1134/S0040579518010037" target="_blank" >10.1134/S0040579518010037</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Local Turbulent Energy Dissipation Rate in an Agitated Vessel: Experimental and Turbulence Scaling

  • Popis výsledku v původním jazyce

    The hydrodynamics and the flow field in an agitated vessel were measured using 2-D time resolved particle image velocimetry (2-D TR PIV). The experiments were carried out in fully baffled cylindrical flat bottom vessels 300 and 400 mm in inner diameter. The 300 mm inner diameter tank was agitated by a Rushton turbine 100 mm in diameter, and the 400 mm inner diameter tank was agitated by a Rushton turbine 133 mm in diameter. Three liquids of different viscosities were used as the agitated liquid: (i) distilled water (&nu; = 9.35 × 10–7 m2/s), (ii) a 28 vol % aqueous solution of glycol (&nu; = 2 × 10–6 m2/s), and (iii) a 43 vol % aqueous solution of glycol (&nu; = 3 × 10–6 m2/s). The velocity fields were measured at an impeller rotation speed in the range from 300 to 850 rpm, which covers the Reynolds number range from 50000 to 189000. This means that fullydeveloped turbulent flow was reached. The experiments were performed to investigate the applicability of the following relations: ε* = ε/(u4/&nu;) = const, vK/u = const, &Lambda;/&eta;K = const, &tau;&Lambda;/&tau;K = const, ε* = ε/((Nd)4/&nu;) = const, &Lambda;/d ∝ Re–1, &eta;K/d ∝ Re–1, vK/(Nd) = const, N&tau;&Lambda; ∝ R–1, N&tau;K ∝ Re–1, and ε/(Nq) ∝ Re. These formulas were theoretically derived in our previous work, using turbulence theory, in particular, using turbulence spectrum analysis. The correctness of the proposed relations is investigated by statistical hypothesis testing.

  • Název v anglickém jazyce

    Local Turbulent Energy Dissipation Rate in an Agitated Vessel: Experimental and Turbulence Scaling

  • Popis výsledku anglicky

    The hydrodynamics and the flow field in an agitated vessel were measured using 2-D time resolved particle image velocimetry (2-D TR PIV). The experiments were carried out in fully baffled cylindrical flat bottom vessels 300 and 400 mm in inner diameter. The 300 mm inner diameter tank was agitated by a Rushton turbine 100 mm in diameter, and the 400 mm inner diameter tank was agitated by a Rushton turbine 133 mm in diameter. Three liquids of different viscosities were used as the agitated liquid: (i) distilled water (&nu; = 9.35 × 10–7 m2/s), (ii) a 28 vol % aqueous solution of glycol (&nu; = 2 × 10–6 m2/s), and (iii) a 43 vol % aqueous solution of glycol (&nu; = 3 × 10–6 m2/s). The velocity fields were measured at an impeller rotation speed in the range from 300 to 850 rpm, which covers the Reynolds number range from 50000 to 189000. This means that fullydeveloped turbulent flow was reached. The experiments were performed to investigate the applicability of the following relations: ε* = ε/(u4/&nu;) = const, vK/u = const, &Lambda;/&eta;K = const, &tau;&Lambda;/&tau;K = const, ε* = ε/((Nd)4/&nu;) = const, &Lambda;/d ∝ Re–1, &eta;K/d ∝ Re–1, vK/(Nd) = const, N&tau;&Lambda; ∝ R–1, N&tau;K ∝ Re–1, and ε/(Nq) ∝ Re. These formulas were theoretically derived in our previous work, using turbulence theory, in particular, using turbulence spectrum analysis. The correctness of the proposed relations is investigated by statistical hypothesis testing.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    20501 - Materials engineering

Návaznosti výsledku

  • Projekt

    Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

  • Návaznosti

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Ostatní

  • Rok uplatnění

    2018

  • Kód důvěrnosti údajů

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

Údaje specifické pro druh výsledku

  • Název periodika

    Theoretical Foundations of Chemical Engineering

  • ISSN

    0040-5795

  • e-ISSN

  • Svazek periodika

    52

  • Číslo periodika v rámci svazku

    1

  • Stát vydavatele periodika

    US - Spojené státy americké

  • Počet stran výsledku

    13

  • Strana od-do

    122-134

  • Kód UT WoS článku

    000426897400016

  • EID výsledku v databázi Scopus

    2-s2.0-85042854670