Distribution of the turbulent kinetic dissipation rate in an agitated vessel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F16%3A00466455" target="_blank" >RIV/67985874:_____/16:00466455 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21220/16:00300989

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Distribution of the turbulent kinetic dissipation rate in an agitated vessel

Popis výsledku v původním jazyce

The design of the agitated tanks depends on the proposed operating conditions and processesnfor that they are used for. Namely dissipation rate of the turbulent kinetic energy is importantnparameter for the scale-up modelling. The dissipation rate is commonly determined as integralnvalue based on power input of the impeller, but without information about distribution insidenthe agitated volume. The cumulative distributions of the dissipation rate within an agitatednvessel are estimated by evaluations of the CFD (Computational Fluid Dynamics) results,nwhere the data was obtained from RANS (Reynolds Averaged Navier-Stokes equations) andnLES (Large Eddy Simulations). The simulations were performed for an agitated vesselnequipped with four baffles and stirred by a standard Rushton turbine (tank diameter 0.3 m,nimpeller diameter 0.1 m, off-bottom clearance half of tank diameter, impeller speed 200 rpm).nThe values of the dissipation rate from the LES calculations were approximated by computingnthe SGS (Sub Grid Scale) dissipation rate.

Název v anglickém jazyce

Distribution of the turbulent kinetic dissipation rate in an agitated vessel

Popis výsledku anglicky

The design of the agitated tanks depends on the proposed operating conditions and processesnfor that they are used for. Namely dissipation rate of the turbulent kinetic energy is importantnparameter for the scale-up modelling. The dissipation rate is commonly determined as integralnvalue based on power input of the impeller, but without information about distribution insidenthe agitated volume. The cumulative distributions of the dissipation rate within an agitatednvessel are estimated by evaluations of the CFD (Computational Fluid Dynamics) results,nwhere the data was obtained from RANS (Reynolds Averaged Navier-Stokes equations) andnLES (Large Eddy Simulations). The simulations were performed for an agitated vesselnequipped with four baffles and stirred by a standard Rushton turbine (tank diameter 0.3 m,nimpeller diameter 0.1 m, off-bottom clearance half of tank diameter, impeller speed 200 rpm).nThe values of the dissipation rate from the LES calculations were approximated by computingnthe SGS (Sub Grid Scale) dissipation rate.

Druh

O - Ostatní výsledky

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

<a href="/cs/project/GA16-20175S" target="_blank" >GA16-20175S: Lokální rychlost disipace turbulentní energie v dispersních systémech</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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