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RANS versus scale resolved approach for modeling turbulent flow in continuous casting of steel
Gregorc, Jurij (Avtor), Kunavar, Ajda (Avtor), Šarler, Božidar (Avtor)

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Izvleček
Numerical modeling is the approach used most often for studying and optimizing the molten steel flow in a continuous casting mold. The selection of the physical model might very much influence such studies. Hence, it is paramount to choose a proper model. In this work, the numerical results of four turbulence models are compared to the experimental results of the water model of continuous casting of steel billets using a single SEN port in a downward vertical orientation. Experimental results were obtained with a 2D PIV (Particle Image Velocimetry) system with measurements taken at various cut planes. Only hydrodynamic effects without solidification are considered. The turbulence is modeled using the RANS (Realizable k-(epsilon), SST k-(omega)), hybrid RANS/Scale Resolved (SAS), and Scale Resolved approach (LES). The models are numerically solved by the finite volume method, with volume of fluid treatment at the free interface. The geometry, boundary conditions, and material properties were entirely consistent with those of the water model experimental study. Thus, the study allowed a detailed comparison and validation of the turbulence models used. The numerical predictions are compared to experimental data using contours of velocity and velocity plots. The agreement is assessed by comparing the lateral dispersion of the liquid jet in a streamwise direction for the core flow and the secondary flow behavior where recirculation zones form. The comparison of the simulations shows that while all four models capture general flow features (e.g., mean velocities in the temporal and spatial domain), only the LES model predicts finer turbulent structures and captures temporal flow fluctuations to the extent observed in the experiment, while SAS bridges the gap between RANS and LES.

Jezik:Angleški jezik
Ključne besede:continuous casting of steel, billet, water model experiment, particle image velocimetry, computational fluid dynamics, turbulence modeling, Reynolds averaged Navier-Stokes equations, large eddy simulation, validation
Vrsta gradiva:Članek v reviji (dk_c)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2021
Št. strani:Str. 1-12
Številčenje:Vol. 11, iss. 7, art. 1140
UDK:621.746:532:004.94
ISSN pri članku:2075-4701
DOI:10.3390/met11071140 Povezava se odpre v novem oknu
COBISS.SI-ID:70786051 Povezava se odpre v novem oknu
Število ogledov:38
Število prenosov:33
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
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Gradivo je del revije

Naslov:Metals
Založnik:MDPI AG
ISSN:2075-4701
COBISS.SI-ID:15976214 Povezava se odpre v novem oknu

Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:P2-0162
Naslov:Tranzientni dvofazni tokovi

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:L2-9246
Naslov:Večfizikalno in večnivojsko numerično modeliranje za konkurenčno kontinuirno ulivanje

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:19.07.2021

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:kontinuirno ulivanje jekla, gredica, eksperiment z vodnim modelom, meritve hitrosti s slikanjem delcev, računalniška dinamika tekočin, modeliranje turbulence, Reynoldsovo povprečene Navier-Stokesove enačbe, simulacija velikih vrtincev, validacija

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