Investigation of applicability area for turbulence models in the problems of mass transfer intensification by the control of a rotary divergent flow

The fundamental scientific problem of this kind arises in mechanics, chemistry and catalysis in the intensification of mass transfer. The turbulent mass transfer characteristics were analyzed experimentally in a controlled rotational-divergent flow. The laser Doppler anemometry was used for turbulen...

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Published inJournal of physics. Conference series Vol. 1369; no. 1; pp. 12034 - 12039
Main Authors Kabardin, I.K., Pravdina, M.Kh, Yavorsky, N.I., Polyakova, V.I., Meledin, V.G., Ezendeeva, D.P., Kakaulin, S.V., Gordienko, M.R., Kulikov, D.V., Sadbakov, O. Yu, Klimonov, I.A., Usov, E.V.
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.11.2019
Subjects
Amplification
Computational fluid dynamics
Empirical equations
Fluid flow
Hydrodynamics
Incompressible flow
Mass transfer
Physics
Reversed flow
Turbulence models
Turbulent flow
Velocity distribution
Velocity measurement
Wall jets
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Summary:The fundamental scientific problem of this kind arises in mechanics, chemistry and catalysis in the intensification of mass transfer. The turbulent mass transfer characteristics were analyzed experimentally in a controlled rotational-divergent flow. The laser Doppler anemometry was used for turbulent mass transfer diagnostic. The verification of numerical calculations by computational hydrodynamics has been carried out according to the results of experimental studies. Calculation of turbulent kinematic is build on solving of a system of continuity and the Navier-Stokes equations. The fluid is incompressible and isothermal. For averaged equations closure, semi-empirical turbulence models were used: the k-ε model of turbulence and the Reynolds stresses transfer model. The calculation has showed the existanceof a near-wall jet after a rotating device and the generation of reverse flow zones. Comparison with experimental data has shown that all models of turbulence adequately model the rotational-divergent flow only until the formation of flow gaps and the formation of reverse flow zones. The discrepancy with the experiment occurs while controlling the flow to equalize the velocity profiles.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1369/1/012034