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An Application of Upwind Difference Scheme with Preconditioned Numerical Fluxes to Gas-Liquid Two-Phase Flows
http://hdl.handle.net/10458/0002001302
http://hdl.handle.net/10458/0002001302dc402806-91cd-4a3d-be1e-ef164d82a266
| 名前 / ファイル | ライセンス | アクション |
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| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||
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| 公開日 | 2025-05-25 | |||||||
| タイトル | ||||||||
| タイトル | An Application of Upwind Difference Scheme with Preconditioned Numerical Fluxes to Gas-Liquid Two-Phase Flows | |||||||
| 言語 | en | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| キーワード | gas-liquid multiphase flow | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| キーワード | low Mach number | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| キーワード | numerical dissipation | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| キーワード | preconditioning | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| キーワード | upwind difference scheme | |||||||
| 資源タイプ | ||||||||
| 資源タイプ | journal article | |||||||
| アクセス権 | ||||||||
| アクセス権 | open access | |||||||
| 著者 |
Zhao, Tianmu
× Zhao, Tianmu
× 申, 炳録 |
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| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | A time-consistent upwind difference scheme with a preconditioned numerical flux for unsteady gas-liquid multiphase flows is presented and applied to the analysis of cavitating flows. The fundamental equations were formulated in general curvilinear coordinates to apply to diverse flow fields. The preconditioning technique was applied specifically to the numerical dissipation terms in the upwinding process without changing the time derivative terms to maintain time consistency. This approach enhances numerical stability in unsteady multiphase flow computations, consistently delivering time-accurate solutions compared to conventional preconditioning methods. A homogeneous gas-liquid two-phase flow model, third-order Runge-Kutta method, and the flux difference splitting upwind scheme coupled with a third-order MUSCL TVD scheme were employed. Numerical tests of two-dimensional gas-liquid single- and two-phase flows over backward-facing step with different step height and flow conditions successfully demonstrated the capability of the present scheme. The calculations remained stable even for flows with a very low Mach number of 0.001, typically considered incompressible flows, and the results were in good agreement with the experimental data. In addition, we analyzed unsteady cavitating flows at high Reynolds numbers and confirmed the effectiveness and applicability of the present scheme for calculating unsteady gas-liquid two-phase flows. | |||||||
| 言語 | en | |||||||
| bibliographic_information |
en : Fluids 巻 10, 号 2, p. 38, 発行日 2025-02-01 |
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| 出版者 | ||||||||
| 出版者 | MDPI AG | |||||||
| 言語 | en | |||||||
| ISSN | ||||||||
| 収録物識別子タイプ | EISSN | |||||||
| 収録物識別子 | 23115521 | |||||||
| item_10001_relation_14 | ||||||||
| 関連タイプ | isVersionOf | |||||||
| 識別子タイプ | DOI | |||||||
| 関連識別子 | https://doi.org/10.3390/fluids10020038 | |||||||
| 権利 | ||||||||
| 権利情報 | © 2025 by the authors. | |||||||
| 言語 | en | |||||||
| 出版タイプ | ||||||||
| 出版タイプ | VoR | |||||||
