| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
We investigate the statistical nature and mixing in elastic turbulence, which is observed in the creeping polymer solution flow, using large-scale parallel computation of chain-polymer model coupled with the equations of motion for solvent fluid. It is found that the steady creeping flows caused by vortices or around the square rod become unsteady states when the long-chain polymers are injected in the flows. Then the transition into the turbulent states are observed when the Weisesnberg number is increased. The power-law decay of spectra for velocity fluctuations is also observed after the turbulent states are attained, where the results are consistent with experimental studies. Moreover we progess the method of two-way coupling simulations for polymer-turbulence interactions and propose the efficient method to decrease the computational cost but keeping the reasonable accuracy of computation.
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