Modeling Progress of High-Temperature Melt Multiphase Flow in Continuous Casting Mold
Received date: 2022-04-17
Revised date: 2022-07-01
Online published: 2022-07-18
Supported by
National Natural Science Foundation of China(51974071);National Natural Science Foundation of China(52171031);China Postdoctoral Science Foundation(2020M680475)
The cleanliness, homogenization, and refinement of the high-quality steel are highly dependent on the high-temperature melt multiphase flow in the continuous casting mold. The high-temperature melt multiphase flow is unsteady-state turbulence that is coupled with heat transfer, mass transfer, phase change, chemical reaction, and electromagnetic effect, forming an extremely complex, unsteady, nonlinear, and nonequilibrium multiphysical fields, where various physical quantities are nearly impossible to on-line measure through on-site testing. With the similarity of flow and solidification processes ensured, both the physical experiment and the numerical simulation of multiscale transport phenomenon have emerged as the prime choices to study the formation mechanism of various defects in continuous casting slabs. However, in various forms, the conventional hydrodynamic problems, such as the high-temperature melt multiphase flow in various metallurgical reactors, is characterized by a considerable change in physical properties, complex constitutive equations, diverse influencing factors of phase interface, and large gradient of physical quantities near the boundary. In addition, in the multiphysical fields inside continuous casting mold, there exists complex and variable multiscale interface phenomena like large-scale interface deformation of the continuous phase, transport of discrete phase particle, and transition between continuous and discrete phase, as well as the multiscale turbulent vortex structure, which poses a great challenge to modeling of high-temperature melt multiphase flow. Compared with the single-phase flow, the multiphase flow is characterized by the topological variation of the phase interface. In this paper, the research progress on modeling the high-temperature melt multiphase flow in the continuous casting mold is discussed from the following four perspectives: the scale distribution of discrete flow interface, cross-scale phenomenon of mixed flow interface, multiscale phenomenon of solidification interface, and role of turbulence in revealing the multiscale phase interface structure. Finally, the potential study direction in the future is considered.
Zhongqiu LIU , Baokuan LI , Lijun XIAO , Yong GAN . Modeling Progress of High-Temperature Melt Multiphase Flow in Continuous Casting Mold[J]. Acta Metall Sin, 2022 , 58(10) : 1236 -1252 . DOI: 10.11900/0412.1961.2022.00175
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