Experimental Studies on the Force exerted on a Disc placed in a Flow of Rarefied Gas
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概要
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Uyeda has devised a flow-meter in vacuum technique [Uyeda & Sugiura, J. Phys. Soc. Japan 8 (1953) 99], whose principle is simply to measure the force on a disc placed in a pipe through which a rarefied gas flows. As a basic study of the meter, the force was measured under various conditions, namely, the pressure of the flowing gas, the diameter of the disc, and the position of the disc along the radius of the pipe being varied. The results of the measurement are shown in figures and expressed by empirical formula. The results here obtained are in agreement with theoretical expectations for Knudsen and Poiseuille flow. In the Knudsen flow, it is confirmed that the assumption of diffuse reflection of molecules on the disc is adequate. In the intermediate flow case between Knudsen and Poiseuille flow, the force shows an anomalous behaviour which seems to have some correlation with the phenomena observed by Knudsen [Ann. d. Phys. 28 (1909) 75] and others.
- 社団法人日本物理学会の論文
- 1954-04-25