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Numerical method for distribution of eigenvalues in laminar pipe flows
https://doi.org/10.18999/memfenu.40.1.121
https://doi.org/10.18999/memfenu.40.1.121778f28ce-b9fa-4a6f-be1d-c3cab53a1ff5
名前 / ファイル | ライセンス | アクション |
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40-1-03.pdf (863.3 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2020-10-29 | |||||
タイトル | ||||||
タイトル | Numerical method for distribution of eigenvalues in laminar pipe flows | |||||
言語 | en | |||||
著者 |
Ito, Tadaya
× Ito, Tadaya× Hase, Kenji× Suematsu, Yoshikazu× Hayase, Toshiyuki |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
抄録 | ||||||
内容記述 | In order to understand in more detail the dynamic structure of the linearized Navier-Stokes equation, a distribution of eigenvalues and classification of modes have been investigated especially for Poiseuille pipe flow. Generally, in numerical analysis of the eigenvalue problem, the accuracy of the eigenvalue gradually diminishes as its order increases. It is therefore difficult to obtain a correct eigenvalue distribution including higher order ones. This report aims to develop an improved numerical method for determining a distribution of eigenvalues with sufficient accuracy in general pipe flows. The method of expansion in orthogonal functions due to Salwen is reformulated in a Hilbert space. Then a finite dimensional approximate system is derived by the Galerkin method. In the Galerkin approximation, it is difficult do determine the dimension of approximate subspace a priori. A criterion for this truncation problem is presented based on a property of operator invariance of the subspace. The present numerical method is applied to Poiseuille pipe flow, and the result is compared with asymptotic method and other numerical methods. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | Faculty of Engineering, Nagoya University | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
ID登録 | ||||||
ID登録 | 10.18999/memfenu.40.1.121 | |||||
ID登録タイプ | JaLC | |||||
ISSN(print) | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 0027-7657 | |||||
書誌情報 |
en : Memoirs of the Faculty of Engineering, Nagoya University 巻 40, 号 1, p. 121-134, 発行日 1988-10-31 |
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著者版フラグ | ||||||
値 | publisher |