| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
Using direct numerical simulation (DNS), we studied universality of three-dimensional incompressible homogenous turbulence and passive scalar turbulence; in particular, the free decay of a certain kind of homogenous turbulence and the mixing of a certain kind of a passive scalar in homogeneous turbulent flow with and without anisotropic external force. The DNSs showed no return to reflection symmetry and isotropy at large scales including energy-containing-range scales. Moreover, it was found that even though the large-scale anisotropy of the velocity field grows with time owing to the external force, its scalar field counterpart remains almost unchanged.
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