Next Article in Journal
Effect of Al Addition on Martensitic Transformation Stability and Microstructural and Mechanical Properties of CuZr Based Shape Memory Alloys
Previous Article in Journal
Structure and Properties of Ti-Al-Ta and Ti-Al-Cr Cladding Layers Fabricated on Titanium
Article

RANS versus Scale Resolved Approach for Modeling Turbulent Flow in Continuous Casting of Steel

1
Laboratory for Fluid Dynamics and Thermodynamics, Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000 Ljubljana, Slovenia
2
Laboratory for Simulation of Materials and Processes, Institute of Metals and Technology, Lepi pot 11, 1000 Ljubljana, Slovenia
*
Author to whom correspondence should be addressed.
Academic Editor: Noé Cheung
Metals 2021, 11(7), 1140; https://doi.org/10.3390/met11071140
Received: 21 June 2021 / Revised: 15 July 2021 / Accepted: 17 July 2021 / Published: 19 July 2021
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-ε, SST k-ω), 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. View Full-Text
Keywords: continuous casting of steel; billet; water model experiment; PIV measurements; CFD; turbulence modeling; RANS; LES; validation continuous casting of steel; billet; water model experiment; PIV measurements; CFD; turbulence modeling; RANS; LES; validation
Show Figures

Figure 1

MDPI and ACS Style

Gregorc, J.; Kunavar, A.; Šarler, B. RANS versus Scale Resolved Approach for Modeling Turbulent Flow in Continuous Casting of Steel. Metals 2021, 11, 1140. https://doi.org/10.3390/met11071140

AMA Style

Gregorc J, Kunavar A, Šarler B. RANS versus Scale Resolved Approach for Modeling Turbulent Flow in Continuous Casting of Steel. Metals. 2021; 11(7):1140. https://doi.org/10.3390/met11071140

Chicago/Turabian Style

Gregorc, Jurij, Ajda Kunavar, and Božidar Šarler. 2021. "RANS versus Scale Resolved Approach for Modeling Turbulent Flow in Continuous Casting of Steel" Metals 11, no. 7: 1140. https://doi.org/10.3390/met11071140

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop