论文信息 - A further contribution to the theory of the transient hot-wire technique for thermal conductivity measurements

A further contribution to the theory of the transient hot-wire technique for thermal conductivity measurements

The paper presents rigorous working equations for an automatic Wheatstone bridge employed in fluid thermal conductivity measurements by the transient hot-wire technique. Particular attention is concentrated upon the inevitable small differences between the two wires employed for the cancellation of the end effects in the experimental arrangement. It is shown that from experimental measurements of the change in the difference of resistance of the two wires as a function of time during their transient heating, it is possible to determine the temperature rise of a wire acting as a finite section of an infinite wire. The correct expressions for the calculation of the heat flux in the wire are also given.

William A. Wakeham | Joseph Kestin | J. Kestin | W. Wakeham | A. A. Clifford

[1] G P Anderson,et al. Automatic operation of a high-precision Wheatstone bridge , 1974 .

[2] J. Kestin,et al. Instrument to measure the thermal conductivity of gases , 1974 .

[3] W. Wakeham,et al. An apparatus to measure the thermal conductivity of liquids , 1976 .

[4] J. Kestin,et al. The thermal conductivity of four monatomic gases as a function of density near room temperature , 1978 .

[5] J. Kestin,et al. The theory of the transient hot-wire cell for measuring the thermal conductivity of gaseous mixtures , 1979 .