摘要
提出了一种直接测量水的体粘滞系数的实验方法———布里渊散射方法。通过分析剪切粘滞系数和体粘滞系数与布里渊散射线宽的关系 ,得到了布里渊散射线宽和频移与水的体粘滞系数关系的公式 ,建立了实验测量水的体粘滞系数的基础 ,给出了不同温度下水的体粘滞系数的实验测量结果 ,估算了这种方法的测量误差。
Brillouin scattering can be used for measurement by frequency modulation with high signal to noise ratio, so that the measuring accuracy is high. A method of using Brillouin scattering technique for measuring directly the bulk viscosity of water was proposed. By analyzing the relationship between the line width of Brillouin scattering and the shear and bulk viscosities, a relation of the bulk viscosity of water with the line width and frequency shift of Brillouin scattering was suggested, which is the basis for determining bulk viscosity experimentally. The experimental data of bulk viscosity of water at different temperatures were given. The testing error of this method was analyzed.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2001年第9期1112-1115,共4页
Acta Optica Sinica
基金
国家科委 86 3高科技项目
国家自然科学基金(6 99880 0 1)资助课题
