| Presentation | 2008-10-30 Direct observation of molecular orientation induced by hyper shear flow Taichi HIRANO, Keiji SAKAI, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Molecular motion in a micro particle of fluid, with approximate radius of 10μm, is determined by the surface tension and the viscosity rather than the gravity and inertia. The characteristic time scale of the macroscopic behavior of the fluid particle is in the order of a few micro seconds. Using a newly developed experimental system, we achieved the measurement of hyper rheology. The head on collision of micro particles can bring the fluid into the very high shear rate up to 10^6 s^<-1>. In such a case of liquid crystals, the coupling between shear flow and molecular rotation plays an important role in determining the fluid properties. We observed the molecular orientation induced by the hyper shear flow, whose time scale is in the similar order of that of the orientational relaxation. The magnitude of the induced orientaional order is estimated with the coupling viscosity and the experimental conditions. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | micro fluid particle / hyper shear rate / shear-orientation coupling |
| Paper # | US2008-47 |
| Date of Issue |
| Conference Information | |
| Committee | US |
|---|---|
| Conference Date | 2008/10/23(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Ultrasonics (US) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Direct observation of molecular orientation induced by hyper shear flow |
| Sub Title (in English) | |
| Keyword(1) | micro fluid particle |
| Keyword(2) | hyper shear rate |
| Keyword(3) | shear-orientation coupling |
| 1st Author's Name | Taichi HIRANO |
| 1st Author's Affiliation | Inst. Indust. Sci., Univ. of Tokyo() |
| 2nd Author's Name | Keiji SAKAI |
| 2nd Author's Affiliation | Inst. Indust. Sci., Univ. of Tokyo |
| Date | 2008-10-30 |
| Paper # | US2008-47 |
| Volume (vol) | vol.108 |
| Number (no) | 266 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |