Movement of gas bubbles in molds with hybrid magnetic fields

作者：Qian Zhongdong; Tang Xuelin^*; Wu Yulin; He Jicheng

来源：Journal of Tsinghua University(Science and Technology), 2003, 43(6): 791-793+797.

• Gas bubbles
• Mold with hybrid magnetic fields
• Particle trajectory models

Gas bubble movement in molds with and without hybrid magnetic fields was simulated using the particle trajectory model to analyze liquid metal purification using hybrid magnetic fields. The tests analyzed the influence of the static magnetic flux density and the distance between the static magnetic field and the alternating magnetic field on the gas bubble removal rate. The results showed that the removal rate increased as the static magnetic flux density was increased from 0 to 0.26 T. The removal rate for big gas bubbles increased as the distance between the static magnetic field and the alternative magnetic field was increased from 270 mm to 420 mm while the removal rate for little gas bubbles decreased for the same condition. The number of gas bubbles entering the upward re-circulating flow and the gas bubble residence time beneath the meniscus were important factors affecting the gas bubble removal rate.

• 出版日期2003
• 单位清华大学