title: Measurement of the bulk viscosity of liquid by Brillouin scattering.
abstract: The aim is to develop a rapid and direct method for measuring the bulk viscosity of a liquid as a function of temperature. Brillouin scattering of a laser beam in fresh water and salt water at different temperatures has been studied. The results show that there exists a close temperature-dependent relationship among the Brillouin frequency shift, the Brillouin linewidth, and the bulk viscosity of water. Thus the bulk viscosity of water can be determined directly from Brillouin-scattering measurements. The method has a high signal-to-noise ratio and high accuracy.
authors.affiliation: Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China.
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Xu
authors.forename: Xiaobin
authors.initials: X
authors.lastname: Ren
authors.forename: Wenping
authors.initials: W
authors.lastname: Gong
authors.forename: Rui
authors.initials: R
authors.lastname: Dai
authors.forename: Dahe
authors.initials: D
authors.lastname: Liu