2017 Fiscal Year Final Research Report
Wave-turbulence interactions near turbulent/non-turbulent interface
| Project/Area Number |
16K18013
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Fluid engineering
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| Research Institution | Nagoya University |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2018-03-31
|
| Keywords | 乱流 / 乱流・非乱流界面 / 安定密度成層 / 圧縮性流れ |
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| Outline of Final Research Achievements |
Direct numerical simulations (DNS) were performed for stably stratified turbulence and compressible turbulence. Influences of internal gravity waves and pressure waves on turbulent/non-turbulent interfaces were investigated by detecting the turbulent fluid based on vorticity or potential vorticity. A multi-particle interaction model was proposed for molecular diffusion and thermal conduction. The performance of the model was evaluated with the DNS database of turbulent planar jets. The piston jet actuator with single/multiple orifice was experimentally studied with cylinder pressure measurement and flow visualization based on the shadowgraph method. These experiments revealed the relation between the cylinder pressure and jet Mach number.
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| Free Research Field |
流体工学
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