It can be neglected that risevelocity of gas bubble is very small in melt.
气泡在熔体中的上升速度很小，可以忽略。
2
A model for the risevelocity of a single deformed bubble in liquid solid fluidized beds was formulated, based on the analysis of the forces acting on a bubble.
以气泡在上升运动过程中的受力分析为基础，建立了描述单个变形气泡在液-固流化床中上升速度的理论模型。
3
The influences of the superficial gas velocity, solid holdup and flowing resistance on gas holdup, bubble size, bubble risevelocity and liquid velocity were systematically studied.