| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Outline of Final Research Achievements |
Shear waves, or transverse waves, can be propagated in viscoelastic fluids. Since the shear wave speed is slower in dilute solutions, the speed of an object through a fluid sometimes exceeds the speed of shear waves in the fluid. It is demonstrated from the experiments with some of the viscoelastic fluids showing significant shear wave propagation, that this leads to a significant change in the flow field of viscoelastic fluids including the formation of Mach cones around a falling sphere. The results suggest the importance of considering viscoelastic Mach numbers that facilitates the understanding of a complex phenomenon associated with viscoelastic fluid flow.
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