Physical modeling of oscillation effect on fluid flow in mold

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