低频液体表面张力与频率关系研究

Frequency dependence of surface tension of a surface acoustic wave

研究了低频液体在不同频率下表面张力的变化特性.计算出蒸馏水在19～30Hz频率范围的动表面张力,给出了不同频率下的表面张力与频率关系曲线.结果表明,表面张力随频率的增长呈非线性增大,且增大幅度逐渐减小.

In order to study the property of different surface tension in different frequency, light interference method is used to study the state of water. Surface tension of water as a function of frequency has been measured for frequency range 19～30 Hz. The surface tension under different frequency are plotted. It is found that surface tension increases as the SAW frequency increases in 19～30 Hz.