Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (5): 1129-1133.doi: 10.3866/PKU.WHXB201602195

• ARTICLE • Previous Articles     Next Articles

Measurements of the Viscosity and Thermal Conductivity of a Gas at Definitive Thermodynamic States

Bao-Lin AN1,Fu-Fang YANG1,Zhen YANG1,Yuan-Yuan DUAN1,*(),Yang-Xin YU2   

  1. 1 Key Laboratory of Thermal Science and Power Engineering of MOE, Beijing Key Laboratory for CO2 Utilization and Reduction Technology, Tsinghua University, Beijing 100084, P. R. China
    2 Department of Chemical Engineeering, Tsinghua University, Beijing 100084, P. R. China
  • Received:2015-12-31 Published:2016-05-07
  • Contact: Yuan-Yuan DUAN E-mail:yyduan@tsinghua.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(51236004);the National Natural Science Foundation of China(51321002);the National Natural Science Foundation of China(21176132)

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Abstract:

The gas viscosity and thermal conductivity are important fluid transport properties, and are related to thermodynamic states. Currently, the main methods to measure the viscosity and thermal conductivity require the gaseous samples to be exposed to non-stationary processes or non-equilibrium processes with gradients of the physical properties. Therefore, the gaseous samples are not located at a definitive thermodynamic state in time or space for each measurement. In this paper, a method to measure the gas viscosity and thermal conductivity at definitive thermodynamic states was studied by analyzing the dissipation of sound energy, which is controlled by the gas viscosity and thermal conductivity. This was performed using the transport theory for a dilute gas, based on the fixed path interference method with a cylindrical resonator. The results were verified by measuring the argon viscosity and thermal conductivity. The results agreed with data in the literature.

Key words: Thermal conductivity, Viscosity, Cylindrical resonator, Thermodynamic state