The Thermal Conductivity, Thermal Diffusivity, and Heat Capacity of Gaseous Argon |
| |
Authors: | L. Sun J. E. S. Venart R. C. Prasad |
| |
Affiliation: | (1) Department of Mechanical Engineering, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick, Canada, E3B 5A3;(2) Department of Engineering, University of New Brunswick, Saint John, New Brunswick, Canada, E2L 4L5 |
| |
Abstract: | This paper presents new absolute measurements for the thermal conductivity and thermal diffusivity of gaseous argon obtained with a transient hot-wire instrument. Six isotherms were measured in the supercritical dense gas at temperatures between 296 and 423 K and pressures up to 61 MPa. A new analysis for the influence of temperature-dependent properties and residual bridge unbalance is used to obtain the thermal conductivity with an uncertainty of less than 1% and the thermal diffusivity with an uncertainty of less than 4%. Isobaric heat capacity results were derived from measured values of thermal conductivity and thermal diffusivity using a density calculated from an equation of state. The heat capacities presented here have a nominal uncertainty of 4% and demonstrate that this property can be obtained successfully with the transient hot wire technique over a wide range of fluid states. The technique will be useful when applied to fluids which lack specific heat data. |
| |
Keywords: | argon dense gas heat capacity thermal conductivity thermal diffusivity transient hot-wire technique |
本文献已被 SpringerLink 等数据库收录! |
|