Physical Simulation of Mold Level Fluctuation Characteristics

• Published in: Metallurgical and materials transactions. B, Process metallurgy and materials processing science Vol. 54; no. 5; pp. 2591 - 2604
• Main Authors: Wang, Zhendong, Shan, Qinglin, Gao, Yu, Pan, Hongwei, Lu, Boxun, Wen, Juwen, Cui, Heng
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.10.2023; Springer Nature B.V
• Subjects: Amplitudes; Characterization and Evaluation of Materials; Chemistry and Materials Science; Fast Fourier transformations; Fluid dynamics; Fourier transforms; Materials Science; Metallic Materials; Molds; Nanotechnology; Original Research Article; Particle image velocimetry; Physical simulation; Quality control; Structural Materials; Surfaces and Interfaces; Thin Films; Wave height
• ISSN: 1073-5615; 1543-1916
• DOI: 10.1007/s11663-023-02860-y

Mold level fluctuations have an essential impact on slab quality control. In this study, the wave height and frequency of the fluctuations were analyzed using significant wave height and fast Fourier transform (FFT) in a water model of the mold. The mold flow field distribution was measured by particle image velocimetry (PIV), and the correlation effect between flow field, wave height, and frequency is discussed. The results show that the frequency change of the fluctuations is mainly influenced by the wavelength. The distance between the position of the vortex center and the narrow face of the mold (NF) increases, the travel of the surface liquid mass point increases, and the wavelength of the generated wave becomes longer, resulting in a decrease in frequency. Increasing the surface velocity will promote the overall fluctuations and have a greater impact on the liquid mass point in the fluctuation generating area, thus making the NF amplitude significantly higher. After entering the fluctuation decay area, the amplitude gradually decreases. Waves with frequencies below 0.1 Hz have the largest amplitude variation and are the most important frequency affecting the fluctuation variation. The maximum main frequency may be spontaneously generated.