Physical Modeling of Oscillation Effect on Fluid Flow in Mold

Y. Xu, H. J. Wu, F. Yue, Engineering Research Institute, University of Science and Technology Beijing, Beijing, China Z. R. HUO, No. 2 Steelmaking Plant, Shanxi Taigang Stainless Steel Co. Ltd., Taiyuan, China This paper focuses on physical modeling of oscillation effect. Two new similarity criterions, π1 = fl / v and π2 = A / l, characterizing the effect of frequency and amplitude respectively on fluid flow, are obtained by dimension analysis method. Based on the similarity principle and the boundary layer theory, a full-scale water model experiment was carried out. Oscillation affected more on fluctuation than surface velocity. Frequency, especially high-frequency, has a greater impact on fluctuation than amplitude does. Compared with non-oscillation, the wave heights have a 300 % increase at 160 r/min frequency and 10 mm amplitude, while the surface velocity has a 15 % rise.