that the
distribution of streaming velocity in aluminum melt is similar to
that in water, at y = 0, 15 mm and 20 mm, the streaming velocity
along the depth direction (x direction) firstly increases and then
decreases; the distribution of streaming velocity is the most special
in steel melt, when y = 0, 15 mm and 20 mm, the streaming veloc-
ity along the depth direction (x direction) decreases from the
beginning, only in the position near the side wall of the booster
the streaming velocity firstly increases and then decreases.