Mori Hayato, Norisuye Tomohisa, Nakanishi Hideyuki, Tran-Cong-Miyata Qui
Department of Macromolecular Science and Engineering, Graduate School of Science & Technology, Kyoto Institute of Technology Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
Department of Macromolecular Science and Engineering, Graduate School of Science & Technology, Kyoto Institute of Technology Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
Ultrasonics. 2018 Feb;83:171-178. doi: 10.1016/j.ultras.2017.03.016. Epub 2017 Mar 30.
The attenuation coefficient and the phase velocity of micrometer-sized polydivinylbenzene particles in water were investigated by ultrasound spectroscopy equipped with 10-30MHz longitudinal wave transducers. While the surrounding liquid could be assumed to be inviscid for large particles with the size comparable to the wavelength of longitudinal ultrasound, the viscous and thermal waves were considered to have important roles with decreasing the particle size because the particle size becomes comparable with those wavelengths. In this study, these contributions were systematically investigated by changing the particle-size.
利用配备10 - 30MHz纵波换能器的超声光谱仪，研究了水中微米级聚二乙烯基苯颗粒的衰减系数和相速度。对于尺寸与纵向超声波长相当的大颗粒，可以假定周围液体是无粘性的；但随着颗粒尺寸减小，粘性波和热波被认为起到重要作用，因为此时颗粒尺寸与那些波长相当。在本研究中，通过改变颗粒尺寸对这些影响进行了系统研究。
