2011 Fiscal Year Final Research Report
A study of stability of two-gyre flow pattern on a rotating sphere
| Project/Area Number |
20740066
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
General mathematics (including Probability theory/Statistical mathematics)
|
|---|
| Research Institution | Tokyo Metropolitan University (2009-2011)
Meiji University (2008) |
|---|
Principal Investigator |
TANIGUCHI Yuki 首都大学東京, 理工学研究科, 特任助教 (50468831)
|
|---|
| Project Period (FY) |
2008 – 2011
|
| Keywords | 回転球面 / 2次元流体 / 境界条件 |
|---|
| Research Abstract |
We study the barotropic flows in a domain on a rotating sphere with the rigid boundary under a uniform easterly wind, and observe two-gyre flow patterns. As wind-forcing increases, an oscillating instability arises from the steady flow of westward intensification by Hopf bifurcation. As wind-forcing is strong, a vortex street occurs from each gyre. As the size of the fluid field is larger, the number of the north and the south vortex streets increases. The westward intensification is observed for steady flow with inflow and outflow.
|
