書誌事項
- タイトル別名
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- A CONTRIBUTION TO EVALUATION METHOD OF DIFFUTION COEFFICIENT
説明
In order to estimate the diffusion coefficient Dc depending on the concentration, the graphical method proposed by Matano1) has been widely used, but the accuracy is not always satisfactory.<br>In this paper, a method is presented to evaluate Dc more accurately using an empirical formula (a) and equation (b).<br>The procedure to calculate Dc from concentration distributions is as follows:<br>1. Approximate values of β, γ and C0 in formula (a) are caldulated using concentration distributions.<br>2. Most probable values of β, γ and C0 are determined by a least squares method using the approximate values of β, γ and C0 obtained in procedure 1. and concentration distributions. And then the empirical formula (a) is determined.<br>3. Differential and integral numericals of formula (a) are calculated.<br>4. Dc's are calculated by substituting the differentials and integrals obtained in procedure 3. into equation (b).<br>The application of this method to some theoretical Fickian, non-Fickian distributions and some experimental distributions shows that Dc calculated by this method are more accurate compared to that obtained by the graphical method.
収録刊行物
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- 繊維学会誌
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繊維学会誌 28 (9), 353-358, 1972
社団法人 繊維学会
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詳細情報 詳細情報について
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- CRID
- 1390001204864866176
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- NII論文ID
- 130004202458
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- ISSN
- 18842259
- 00379875
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
- OpenAIRE
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- 抄録ライセンスフラグ
- 使用不可
