Accommodation Coefficients of Hydrogen, Helium Air, and Argon for Chrome Surfaces at Reduced Pressures.
Accommodation Coefficients of Hydrogen, Helium Air, and Argon for Chrome Surfaces at Reduced Pressures.
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减压下铬表面的氢气、氦气和氩气调节系数。
DOI：
10.1021/i460003a008
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发表时间：
1958
期刊：
影响因子：
--
通讯作者：
J. Lokay
中科院分区：
文献类型：
--
作者：
R. Peck;J. Lokay
1942年，Boelter(1)和他的同事发现缺乏关于气体导热系数的准确数据。在19篇关于空气导热系数的报告中，与平均值的偏差高达7%。测量了气体的表观导热系数，计算了气体的容纳系数和真导热系数。应用气体动力学理论提出导热系数的概念，得出导热系数应与比热和粘度的乘积成正比的结论。在低压范围内，由于表观系数和比热基本上与气体压力无关，因此导热系数也应与压力无关。Stefan(12)的实验证实，气体的导热系数与压力无关。
In 1942 Boelter (1) and associates found a scarcity of accurate data on the thermal conductivity of gases. Among 19 reports on the thermal conductivity of air,-the deviation from the mean value was as much as 7%. The apparent thermal conductivity was measured and accommodation coefficients and truethermal conductivities of the gas were calculated from these data.Applying the kinetic theory of gases to theconcept of thermal conductivity leads to the conclusion that the heat conductivity should be proportional to the product of the specific heat and the viscosity. As the coefficient of vis-cosity and the specific heat are substantially independent of the pressure of the gas in the low pressure range, thermal conductivity should also be independent of thepres-sure. Experiments performed by Stefan (12) confirmedthat the thermal conductivity of a gas is independent of pres-