Počet záznamů: 1
Semianalytical characterization of turbulence from radial impellers, with experimental and numerical validation
- 1.
SYSNO ASEP 0438382 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Semianalytical characterization of turbulence from radial impellers, with experimental and numerical validation Tvůrce(i) Ben-Nun, R. (IL)
Sheintuch, M. (IL)
Kysela, Bohuš (UH-J) SAI, ORCID, RID
Konfršt, Jiří (UH-J) SAI, ORCID, RID
Fořt, I. (CZ)Zdroj.dok. AIChE Journal. - : Wiley - ISSN 0001-1541
Roč. 61, č. 4 (2015), s. 1413-1426Poč.str. 14 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova turbulent jet ; mixing ; radial impeller ; stirred tank ; Rushton turbine Vědní obor RIV BK - Mechanika tekutin Obor OECD Fluids and plasma physics (including surface physics) CEP GAP101/12/2274 GA ČR - Grantová agentura ČR Institucionální podpora UH-J - RVO:67985874 UT WOS 000354695200025 EID SCOPUS 84925255265 DOI https://doi.org/10.1002/aic.14723 Anotace We characterize turbulent flow from radial impellers in stirred tanks, formulating semi-analytical predictions based on conventional turbulent-jet theory and the general framework of scalar dispersion in turbulent shear flows. This work introduces a novel formulation of the radial-discharge flow as two separate spatial regions along the radial axis: the zone of flow establishment (ZFE) and the zone of established flow (ZEF). We discover and analyze resulting critical improvements in the prediction of key parameters of turbulent kinetic energy and associated dissipation rate. Further, we derive and examine functional forms of the random turbulence in the ZFE region, based upon empirical inputs of averaged radial velocity as well as related calibration coefficients. Finally, we validate this new theoretical framework, both with laser Doppler anemometry (LDA) measurements, and with three-dimensional numerical simulations using the standard k-ε turbulent model. This article is protected by copyright. All rights reserved. Pracoviště Ústav pro hydrodynamiku Kontakt Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Rok sběru 2016
Počet záznamů: 1