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- 松田 七美男
- 東京電機大学工学部自然科学系列
書誌事項
- タイトル別名
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- Mean Free Path and Correction Factor for the Long Uniform Ducts of Isosceles-Triangle Cross Section
- ニトウヘンサンカクケイ ダンメン オ モツ ナガイ イチヨウ ドウカン ノ ヘイキン ジユウ コウテイ ト ケイジョウ ホセイ ケイスウ
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<p>In application of one dimensional diffusion theory to gas molecular flow in the steady state through long ducts of uniform cross section, diffusion coefficient 𝒟 is generally represented as</p><p><img align="middle" src="./Graphics/abst-61_539-1.jpg"/></p><p>here λ is a kind of mean free path and v is avarage velocity of molecules. Up to now rigorous expressions of λ=λS where λS is Smoluchowski's expression for λ which have been given by Smoluchowski himself and other author for rectangular, ellipsoidal and annular cross section. As for triangular cross section, the rigorous expression has been obtained only on equilatera-triangle cross section. In this report, the concrete expression of λS and the correction factor α defined by the ratio of λS/λK where λK is Knudsen's expression for λ, are deduced for long ducts with isosceles-triangle cross sections. The values for λS and α, which are given by these deduced formula, are compared with those obtained from the Monte-Carlo simulation, which uses the mean free path in the duct ℓ and the mean square of free path in the axial direction of the duct <img align="middle" src="./Graphics/abst-61_539-3.jpg"/>.</p>
収録刊行物
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- 表面と真空
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表面と真空 61 (8), 539-543, 2018-08-10
公益社団法人 日本表面真空学会
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詳細情報 詳細情報について
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- CRID
- 1390845712985038848
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- NII論文ID
- 130007432268
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- NII書誌ID
- AA12808657
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- ISSN
- 24335843
- 24335835
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- NDL書誌ID
- 029205011
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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
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