2014 Fiscal Year Final Research Report
A competition between phase transition dynamics and the nonlinear rheology in granular matter
| Project/Area Number |
25800234
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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 |
Biological physics/Chemical physics/Soft matter physics
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| Research Institution | Hokkaido University (2014)
The University of Tokyo (2013) |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | 相転移ダイナミクス / 粉粒体 / 撥水 / フォーム / 濡れ |
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| Outline of Final Research Achievements |
We have experimentally investigated a dynamic competition between the strongly non-equilibrium state associated with phase transitions and instabilities, and the nonlinear rheology of granular matter. In this study, using dewetting (one of the interfacial instabilities) of the thin film of wet foam as an example, we performed real-space and -time observations of the ordering process ranging from the birth of the instability involving one particle motion to macroscopic coarsening in the late stage. We found a new scaling law in the ordering dynamics of the instability, focusing on the violation of the conventional scaling law in usual viscous fluids due to the nonlinear rheology of wet foam.
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| Free Research Field |
液体物理学
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