试验研究表明，自由表面速度与内部速度是有区别的，本文给出了二者之间的定量关系。
The experimental study demonstrates that the velocities of particles at free surface are different from those in cratering. Their quantitative relationship is given.
采用粒子图像测速技术对平板类铸件浇注过程水模拟的充型自由表面速度场进行了测试分析。
In this paper, it is tested that the surface velocity fields of the planar casting water simulation using the Digital Particle Image Velocimetry technology DPIV.
越靠近自由表面，底部射流横向发展越窄，而向上的压力梯度，气泡上升速度，底部射流上升高度越大，反之则反；
The more the bubble close to the free surface, the narrower the bottom jet develops crosswise, and the larger the pressure gradient, the rising velocity and the height of the bottom jet is upwards.
激波在自由面反射后，自由表面附近的粒子速度为活塞速度的二倍，这和宏观力学结果相同。
After reflection, the average particle velocity near free surface is equal to twice the piston velocity approximately, which agrees with macroscopic phenomena.
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…
计算了自由面的速度势、自由表面波高时间历程和物体受到的波浪力。
The potentials on the free surface, the time histories of wave elevations and wave forces on the body are calculated.
使用有限法求解不可压缩牛顿流体流动控制方程，用体积函数法跟踪金属液自由表面的移动，预测了机体充型过程的流动速度场和温度场。
The incompressible, Newtonian fluid flow equations are solved using finite element method. The free surface motion of molten metal is tracked by the volumetric function approach.
蒸发的速度与自由液面表面积，液体温度，液面风速等有关．。
Evaporation rate depends on the free surface area, the temperature, the flow rate above, etc.
蒸发的速度与自由液面表面积，液体温度，液面风速等有关．。
Evaporation rate depends on the free surface area, the temperature, the flow rate above, etc.
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