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Distribution of the turbulent kinetic dissipation rate in an agitated vessel
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SYSNO ASEP 0466455 Document Type A - Abstract R&D Document Type O - Ostatní Title Distribution of the turbulent kinetic dissipation rate in an agitated vessel Author(s) Kysela, Bohuš (UH-J) SAI, ORCID, RID
Sulc, R. (CZ)
Konfršt, Jiří (UH-J) SAI, ORCID, RID
Chára, Zdeněk (UH-J) SAI, ORCID, RID
Fořt, I. (CZ)
Ditl, P. (CZ)Source Title CHISA 2016 : 22nd international congress of chemical and process engineering : Abstracts. - Praha : Česká společnost chemického inženýrství, 2016 Number of pages 2 s. Publication form Medium - C Action International Congress of Chemical and Process Engineering /22./ Event date 27.08.2016 - 31.08.2016 VEvent location Prague Country CZ - Czech Republic Event type WRD Language eng - English Country CZ - Czech Republic Keywords agitated vessel ; dissipation rate ; kinetic energy Subject RIV BK - Fluid Dynamics R&D Projects GA16-20175S GA ČR - Czech Science Foundation (CSF) Institutional support UH-J - RVO:67985874 Annotation The design of the agitated tanks depends on the proposed operating conditions and processes
for that they are used for. Namely dissipation rate of the turbulent kinetic energy is important
parameter for the scale-up modelling. The dissipation rate is commonly determined as integral
value based on power input of the impeller, but without information about distribution inside
the agitated volume. The cumulative distributions of the dissipation rate within an agitated
vessel are estimated by evaluations of the CFD (Computational Fluid Dynamics) results,
where the data was obtained from RANS (Reynolds Averaged Navier-Stokes equations) and
LES (Large Eddy Simulations). The simulations were performed for an agitated vessel
equipped with four baffles and stirred by a standard Rushton turbine (tank diameter 0.3 m,
impeller diameter 0.1 m, off-bottom clearance half of tank diameter, impeller speed 200 rpm).
The values of the dissipation rate from the LES calculations were approximated by computing
the SGS (Sub Grid Scale) dissipation rate.Workplace Institute of Hydrodynamics Contact Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Year of Publishing 2017
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