2011 Fiscal Year Final Research Report
Investigation of free-s urface turbulent heat and mass transfer by means of large-scale direct numerical simulation and high-precision turbule nt measurement
| Project/Area Number |
21760156
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Thermal engineering
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| Research Institution | University of Yamanashi (2011)
Kyoto University (2009-2010) |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2011
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| Keywords | 自由表面流 / 乱流熱物質移動 / 直接数値計算 |
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| Research Abstract |
In this study, we successfully conducted a direct numerical simulation of a high-Fr turbulent open-channel flow at a Froude number of 1. 8 and a Reynolds number of 2325 based on bulk velocity, gravitational acceleration, water depth, and kinetic viscosity, using the multi-interface advection and reconstruction solver(MARS). Near the free-surface, wall-normal turbulent intensity and energy-dissipation rates increase toward the free-surface, and the tendencies of turbulent statistical quantities near the free-surface are in good agreement with the experimental measurements obtained using a laser Doppler anemometer(LDA). Finally, we established the high-precision direct numerical simulator, which can be covered the effects of high-Pr heat transfer and magnetic force for design activity to the next generation fusion reactor engineering.
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