The flow induced by yawing motion in unidirectionally solidifying alloys

摘要

As the cooling tank is yawing, there occurs an induced flow in the binary solution cooled from felow. The induced flow may stabilize the potentially unstable soltion during directional solidifiction and suppress the formation of freckles in the cast alloys. We investigate this induced flow by an analytical approach. Results show that the induced flow in the melt region consists of three paralleling shear flows of different length scales. The one in the vicinity above the melt/much interface has the largest velocity gradient.