Experiments on ring wave packet generated by water drop  

作　　者：ZHU GuoZhen LI ZhaoHui FU DeYong 

机构地区：[1]Department of Physics, Tsinghua University, Beijing 100084, China

出　　处：《Chinese Science Bulletin》2008年第11期1634-1638,共5页

基　　金：the State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences;partially supported by the National Natural Science Foun-dation of China (Grant No. 10674081)

摘　　要：The propagation of ring wave packet (composed of carrier waves modulated by an envelope) generated by a water drop was studied experimentally. It is a localized wave packet propagating with constant velocity and low diffusion. The wavelength, the amplitude and the waveform of the carrier waves, the velocity of the carrier waves and the packet have been measured. The measured wavelength λe of the carrier waves and the measured group velocity Cge of the packet are near the minimum point of the dispersion curve of group velocity, which may be the main reason why the packet can propagate with low diffusion.The propagation of ring wave packet （composed of carrier waves modulated by an envelope） generated by a water drop was studied experimentally. It is a localized wave packet propagating with constant velocity and low diffusion. The wavelength, the amplitude and the waveform of the carrier waves, the velocity of the carrier waves and the packet have been measured. The measured wavelength λa of the carrier waves and the measured group velocity Cge of the packet are near the minimum point of the dispersion curve of group velocity, which may be the main reason why the packet can propagate with low diffusion.

关 键 词：水滴 环状波包 实验研究 水表面波 

分 类 号：O35[理学—流体力学]