自由沉降速度又称终端速度。指任一颗粒的沉降不因流体中存在其他颗粒而受到干扰时，在等速阶段里颗粒相对于流体的运动速度。即加速阶段终了时颗粒相对于流体的速度。
填料膨胀率的大小与液体流量、填料的流化速度及自由沉降速度有关。
The expansion ratio is related to the liquid flow rate, fluidization velocity and free descending velocity of the packing material.
结果表明，矿粒表面疏水化后，在水中的自由沉降速度和干涉沉降速度均上升，这与理论分析结果相一致。
The results show that the free settling velocity and the hindered settling rate of fine particles in water have increased after the mineral surface becam…
该添加系统以浓缩池自由区的煤泥水为检测对象，以沉降速度作为反馈量，构成闭环控制系统。
The adding system regards the slime water of the free district of the thickener as detecting target, sedimental speed as the feedback, form the close-circuit control system.
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