期刊
JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA
卷 46, 期 1, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4977429
关键词
carbon dioxide; critical enhancement; data analysis; Rainwater-Friend theory; thermodynamic scaling; thermophysical properties; viscosity
资金
- U.S. Department of Energy, National Energy Technology Laboratory, under Interagency Agreement [DE-FE0003931]
A comprehensive database of experimental and computed data for the viscosity of carbon dioxide (CO2) was compiled and a new reference correlation was developed. Literature results based on an ab initio potential energy surface were the foundation of the correlation of the viscosity in the limit of zero density in the temperature range from 100 to 2000 K. Guided symbolic regression was employed to obtain a new functional form that extrapolates correctly to 0 and to 10 000 K. Coordinated measurements at low density made it possible to implement the temperature dependence of the Rainwater-Friend theory in the linear-in-density viscosity term. The residual viscosity could be formulated with a scaling term rho(gamma)/T, the significance of which was confirmed by symbolic regression. The final viscosity correlation covers temperatures from 100 to 2000 K for gaseous CO2 and from 220 to 700 K with pressures along the melting line up to 8000 MPa for compressed and supercritical liquid states. The data representation is more accurate than with the previous correlations, and the covered pressure and temperature range is significantly extended. The critical enhancement of the viscosity of CO2 is included in the new correlation. (C) 2017 by the U.S. Secretary of Commerce on behalf of the United States. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据