COMPUTATIONAL METHOD TO IMPROVE CFL CONDITIONS IN FRACTIONAL-STEP METHOD FOR COMPRESSIBLE FLUIDS WITH LOCAL AVERAGING
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- TORIU Daisuke
- 京都大学大学院工学研究科 社会基盤工学専攻
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- USHIJIMA Satoru
- 京都大学学術情報メディアセンター
Bibliographic Information
- Other Title
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- 局所平均化操作を伴う部分段階圧縮性流体解法におけるCFL条件の緩和手法
Abstract
In this paper, we proposed a computational method for thermal interaction problems between compressible fluids and solids, which enables us to improve CFL (Courant-Friedrichs-Lewy) conditions based on the speed of sound. In this method, the updating of density and the local averaging operations for velocities are conducted so that new time-step variables satisfy discretized equations in the implicit pressure calculation stage. Through the application to the natural convection in the cavity containing a thermal conductive solid, it was shown that the present method enables us to calculate low Mach number compressible flows free from CFL conditions based on the speed of sound and decrease the computation time.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))
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Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 71 (2), I_213-I_222, 2015
Japan Society of Civil Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390282680327329408
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- NII Article ID
- 130005128867
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- ISSN
- 21854661
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- HANDLE
- 2433/229151
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- Text Lang
- ja
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- Data Source
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- JaLC
- IRDB
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed