| Project/Area Number |
20740250
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Solid earth and planetary physics
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
SAKURABA Ataru The University of Tokyo, 大学院・理学系研究科, 助教 (50345261)
|
|---|
| Project Period (FY) |
2008 – 2009
|
| Project Status |
Completed (Fiscal Year 2009)
|
| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
|
|---|
| Keywords | 地球電磁気 / 地磁気 / 非線形偏微分方程式 / 電磁流体 / 回転流体 / 地球ダイナモ / 天体ダイナモ |
|---|
| Research Abstract |
Numerical simulations of low-viscosity Earth-type dynamo show that, contrary to previous similar studies, an Earth-like strong magnetic field and a large-scale convection pattern can emerge. This contradiction arises because previous models imposed a geophysically inappropriate uniform-surface-temperature boundary condition. Although the core viscosity is much lower than the numerical models, it is suggested that a strong magnetic field and large-scale convection are still alive even in an inviscid limit.
|
