Semianalytical characterization of turbulence from radial impellers, with experimental and numerical validation

Ronen Ben-Nun; Moshe Sheintuch; Bohuš Kysela; Jiří Konfršt; Ivan Fořt

doi:10.1002/aic.14723

Semianalytical characterization of turbulence from radial impellers, with experimental and numerical validation

Ronen Ben-Nun^*, Moshe Sheintuch, Bohuš Kysela, Jiří Konfršt, Ivan Fořt

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Based on conventional turbulent jet theory and the general theoretical framework of scalar dispersion in turbulent shear flows, a novel formulation of the radial impeller's jet in stirred tanks is introduced. Whereas previous studies considered the impeller's jet as developed, it is now comprised of two separate spatial regions along the radial axis: the zone of flow establishment (ZFE) and the zone of established flow (ZEF). This formulation is accompanied with semi-analytical expressions for the prediction of turbulent key parameters including the random part of k and ε in the ZFE. The new theoretical framework is validated both with laser Doppler anemometry measurements and with 3-D numerical simulations using the standard k-ε turbulent model.

Original language	English
Pages (from-to)	1413-1426
Number of pages	14
Journal	AICHE Journal
Volume	61
Issue number	4
DOIs	https://doi.org/10.1002/aic.14723
State	Published - 1 Apr 2015
Externally published	Yes

Keywords

Mixing
Radial impeller
Rushton turbine
Stirred tank
Turbulent jet

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10.1002/aic.14723

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title = "Semianalytical characterization of turbulence from radial impellers, with experimental and numerical validation",

abstract = "Based on conventional turbulent jet theory and the general theoretical framework of scalar dispersion in turbulent shear flows, a novel formulation of the radial impeller's jet in stirred tanks is introduced. Whereas previous studies considered the impeller's jet as developed, it is now comprised of two separate spatial regions along the radial axis: the zone of flow establishment (ZFE) and the zone of established flow (ZEF). This formulation is accompanied with semi-analytical expressions for the prediction of turbulent key parameters including the random part of k and ε in the ZFE. The new theoretical framework is validated both with laser Doppler anemometry measurements and with 3-D numerical simulations using the standard k-ε turbulent model.",

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T1 - Semianalytical characterization of turbulence from radial impellers, with experimental and numerical validation

AU - Ben-Nun, Ronen

AU - Sheintuch, Moshe

AU - Kysela, Bohuš

AU - Konfršt, Jiří

AU - Fořt, Ivan

PY - 2015/4/1

Y1 - 2015/4/1

N2 - Based on conventional turbulent jet theory and the general theoretical framework of scalar dispersion in turbulent shear flows, a novel formulation of the radial impeller's jet in stirred tanks is introduced. Whereas previous studies considered the impeller's jet as developed, it is now comprised of two separate spatial regions along the radial axis: the zone of flow establishment (ZFE) and the zone of established flow (ZEF). This formulation is accompanied with semi-analytical expressions for the prediction of turbulent key parameters including the random part of k and ε in the ZFE. The new theoretical framework is validated both with laser Doppler anemometry measurements and with 3-D numerical simulations using the standard k-ε turbulent model.

AB - Based on conventional turbulent jet theory and the general theoretical framework of scalar dispersion in turbulent shear flows, a novel formulation of the radial impeller's jet in stirred tanks is introduced. Whereas previous studies considered the impeller's jet as developed, it is now comprised of two separate spatial regions along the radial axis: the zone of flow establishment (ZFE) and the zone of established flow (ZEF). This formulation is accompanied with semi-analytical expressions for the prediction of turbulent key parameters including the random part of k and ε in the ZFE. The new theoretical framework is validated both with laser Doppler anemometry measurements and with 3-D numerical simulations using the standard k-ε turbulent model.

KW - Mixing

KW - Radial impeller

KW - Rushton turbine

KW - Stirred tank

KW - Turbulent jet

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EP - 1426

JO - AICHE Journal

JF - AICHE Journal

IS - 4

ER -

Semianalytical characterization of turbulence from radial impellers, with experimental and numerical validation

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Keywords

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