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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。实验和理论分析都表明这是一种直接测量水的体粘滞系数的快速而精确的方法
An experimental method to directly measure the bulk viscosity of water --- Brillouin scattering method is proposed. By analyzing the relationship between shear viscosity and bulk viscous coefficient and Brillouin scattering line width, the formula of the relationship between the width and frequency shift of Brillouin scattering and the body viscosity of water is obtained, and the experimentally measured water The basis of body viscosity, the experimental results of body viscosity of water at different temperatures are given, and the measurement error of this method is estimated. Both experimental and theoretical analysis have shown that this is a fast and accurate method for directly measuring the bulk viscosity of water