| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
The interior dynamics of the double-diffusive intrusions emerge from a thermohaline front is investigated using numerical simulations, theoretical modelling, and laboratory experiments. In the two-dimensional direct numerical simulations which can explicitly resolve finger and diffusive convections, a reversal of the slope of the intrusions is observed as the compositional density differences across the front increases. These results are also confirmed in the laboratory version of the experiments, which use two sugar and salt stratifications. A mechanistic model of intrusive layers was devised by parameterising small-scale convective transports in terms of large-scale quantities. An attempt of laser scattering observation was also made in the laboratory tank to detect temporal evolution of fingers.
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