scholarly journals Lattice Boltzmann Method Modeling of Flow Structures and Level Fluctuations in a Continuous Casting Process

ACS Omega ◽  
2019 ◽  
Vol 4 (8) ◽  
pp. 13131-13142
Author(s):  
Peng Zhao ◽  
Bin Yang ◽  
Rongxun Piao
Keyword(s):  
Continuous Casting ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Casting Process ◽  
Flow Structures ◽  
Continuous Casting Process ◽  
Boltzmann Method

Very-Large Eddy Simulations of Disk Heat Transfer in a Rotating Cavity Using Lattice-Boltzmann Method

2018 ◽  
Author(s):  
J. Kouwa ◽  
Y. Iso ◽  
F. Polidoro ◽  
S. Gautier
Keyword(s):  
Heat Transfer ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Three Dimensional ◽  
Flow Structures ◽  
Physical Parameters ◽  
Transfer Coefficients ◽  
Experimental Heat ◽  
Large Eddy ◽  
Boltzmann Method

Convective heat transfer in the cavity between two corotating disks is of great importance for turbomachinery applications. The complex three dimensional and unsteady flow structures induced by the Coriolis forces inside the cavity, and therefore the resulting heat transfer, are challenging to be measured in an experiment or predicted by simulation. In this paper a simplified cavity geometry, characterized experimentally by Long at al., has been chosen. The results obtained with a Very Large Eddy Simulation using Lattice-Boltzmann Method for two operating point with different rotation speeds are compared to the experimental heat transfer coefficients at the wall. The simulation results show the characteristic flow structures and behavior induced by the different regimes. A sensitivity analysis of the results is presented, both for numerical parameters such as grid resolution and for physical parameters, namely the throughflow velocity profile and shroud temperature.

scholarly journals Numerical Analysis of Flow Phenomena in Discharge Object with Siphon Using Lattice Boltzmann Method and CFD

Mathematics ◽  
2021 ◽  
Vol 9 (15) ◽  
pp. 1734
Author(s):  
Jiří Fürst ◽  
Tomáš Halada ◽  
Milan Sedlář ◽  
Tomáš Krátký ◽  
Pavel Procházka ◽  
...  
Keyword(s):  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Free Water ◽  
Turbulence Models ◽  
Stationary Flow ◽  
Volume Of Fluid ◽  
Surface Flow ◽  
Flow Structures ◽  
Complex Flow ◽  
Boltzmann Method

This article presents numerical simulation of flow in the discharge object with the welded siphon and the free water level. The main numerical tool used in this study is the lattice Boltzmann method combined with the Volume-of-Fluid approach and the Smagorinski LES model. Some aspects of the numerical method are discussed, especially the formulation of the outlet boundary condition. The simulations are carried out with in-house software based on the open-source Palabos framework. Presented results are compared with the CFD simulations, based on the ANSYS CFX software applying the SST and SAS turbulence models and the free-surface flow modeling by means of the Volume-of-Fluid method. The evolution and interactions of main flow structures are analyzed using visualizations and the spectral analysis. All numerical simulations are verified by the experimental data obtained in the hydraulic laboratory with water circuit. A stationary flow regime has been visualized by means of PIV. Both the vertical planes and horizontal planes have been examined, focused mainly on the regions below and behind the siphon outlet. The results show a good agreement of calculated and measured complex flow structures, including time-averaged and instantaneous flow fields.

Sign in / Sign up

Export Citation Format

Share Document