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- 堀越 源一
- 高エネルギー物理学研究所
書誌事項
- タイトル別名
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- An analysis and a consideration of molecular flow in a long conduit pipe.
- ナガイ イチヨウ ダンメン パイプ ノ ブンシリュウ コンダクタンス ノ カイ
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The old problem on the molecular flow conductance in a long conduit pipe with a uniform cross sections was analyzed by using a concept of gas diffusion process in a uniform medium. This problem was first treated by Knudsen giving a famous approximate expression for the molecular flow conductance and, after a year, Smoluchowski has given a rigorous expression by summing up motions of individual molecules. In this report, a trial was made to understand molecular flow in a conduit pipe as one of the diffusion processes. It turned out that the well known expression of diffusion coefficient (D=1/3·υλ) did not apply to the problem. A careful consideration has given a more rigorous expression of diffusion coefficient, i.e.<BR>D=1/2·υ (l cos θ) 2/lwhere l and l2 are the average and average square of free paths of gas molecules and θ is the angle between l and molecular density gradient. By using the above expression, one can treat the molecular flow as an diffusion process and can obtain the regorous expression of molecular flow conductance.
収録刊行物
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- 真空
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真空 30 (8), 658-665, 1987
一般社団法人 日本真空学会
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詳細情報 詳細情報について
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- CRID
- 1390282679040545792
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- NII論文ID
- 130000863814
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- NII書誌ID
- AN00119871
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- ISSN
- 18809413
- 05598516
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- NDL書誌ID
- 3139505
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
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- 抄録ライセンスフラグ
- 使用不可