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Transient Cooling of an Enclosed Fluid through Its Maximun-Density Temperature
https://jaxa.repo.nii.ac.jp/records/31435
https://jaxa.repo.nii.ac.jp/records/31435a917dc98-53f2-4112-bfed-36412a7fa7dc
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
SA0035249.pdf (1.5 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||
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| 公開日 | 2015-03-26 | |||||||||
| タイトル | ||||||||||
| タイトル | Transient Cooling of an Enclosed Fluid through Its Maximun-Density Temperature | |||||||||
| 言語 | en | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
| 資源タイプ | departmental bulletin paper | |||||||||
| 著者 |
KWAK, Ho Sang
× KWAK, Ho Sang
× KUWAHARA, Kunio
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| 出版者 | ||||||||||
| 出版者 | 宇宙科学研究所 | |||||||||
| 出版者（英） | ||||||||||
| 出版者 | Institute of Space and Astronautical Science | |||||||||
| 書誌情報 |
en : The Institute of Space and Astronautical Science report 巻 667, p. 1-18, 発行日 1997-03 |
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| 抄録（英） | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | Transient cool-down process of a fluid from an initial high temperature to a target temperature in a closed container is investigated numerically. The fluid has a quadratic density-temperature relationship, and the maximum density occurring at T_m. Cooling is accomplished by abruptly lowing the sidewall temperature, and the mean temperature passes through T_m in the course of cool-down. A finite-volume method is employed to acquire numerical solutions to the full, time-dependent two-dimensional Navier-Stokes equations. In order to simulate the realistic situations under micro gravity, the Rayleigh number, Ra, encompasses the range 10^5 ≤ Ra ≤ 10^8. The effects of the density inversion on the cool-down are illuminated. Based on the structures of the aidewall boundary layer, three characteristic flow regimes are identified at early time. The qualitative early-time behavior is detemined by the density inversion factor. Evolutions of the global fields of flow and temperature of each flow regime are described. The analysis of time-dependent heat transfer characteristics reveals that the cool-down process is divided into several definite transient phases. The relevant time scales for the overall cool-down process are estimated. The specific effects of the Rayleigh number, density inversion factor, and the aspect ratio of the container on each evolutionary stage are elaborated. | |||||||||
| ISSN | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 0285-6808 | |||||||||
| 書誌レコードID | ||||||||||
| 収録物識別子タイプ | NCID | |||||||||
| 収録物識別子 | AA10632072 | |||||||||
| 資料番号 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 資料番号: SA0035249000 | |||||||||
