惰性气体黏度的剩余熵标度模型

黏度是能源、动力、化工等系统设计分析中常用的重要物性参数.本文探讨了5种惰性气体(He、Ne、Ar、Kr、Xe)气相和超临界黏度的计算,以实际气体与同温度稀薄气体的黏度之比作为无量纲对比黏度,发现5种惰性气体的无量纲对比黏度与剩余熵之间满足同一单值函数关系,据此建立了惰性气体的气相和超临界黏度模型,其中稀薄气体黏度关联...

Residual Entropy Scaling Model for the Viscosity of Noble Gases

Viscosity is an important property commonly used in the design and analysis of the systems such as energy,power,and chemical industry.In this work,the calculation of gaseous and supercritical viscosity of 5 noble gases(He,Ne,Ar,Kr,and Xe) is discussed.It is found that the dimensionless viscosity(the actual viscosity divided by the dilute gas viscosity at the same temperature) of the 5 noble gases follows the same univariate function of residual entropy.Based on this,the gaseous and supercritical viscosity model for noble gases is established.The dilute gas viscosity correlation is developed based on the kinetic theory,and the residual entropy is determined by Soave-Redlich-Kwong(SRK) equation of state.The results are compared with the experimental data at 183~2150 K and pressures within 380 MPa,89% of the 1819 data points have a deviation of less than 1.5%,while the data points with large deviation are mainly at high pressures above 10 MPa,and the maximum deviation is 4.4%.The model can be applied for the prediction of noble gas viscosity in the region without sufficient experimental data.