Convergence of the vortex method for vortex sheets
Convergence of the vortex method for vortex sheets
复制标题
涡片涡法的收敛性
DOI:
10.1137/0726059
复制
发表时间:
1989
影响因子:
2.9
通讯作者:
J. Lowengrub
中科院分区:
文献类型:
--
作者:
R. Caflisch;J. Lowengrub
Computation of the evolution of vortex sheets is delicate because of Kelvin–Helmholtz instability and singularity formation (infinite curvature). Convergence of the point vortex method and the vortex blob method is demonstrated for vortex sheets with both spatial and temporal discretization and with simulated roundofl error. The initial data is assumed to be a small analytic perturbation of a flat, uniform sheet. The proof works for a short time interval, certainly less than the first time of singularity formation. The analysis is performed in an analytic function space using the abstract Cauchy–Kowalewski Theorem. A numerical-analytic interpretation of analyticity is given.