Short branch cut approximation in two-dimensional hydrodynamics with free surface
Short branch cut approximation in two-dimensional hydrodynamics with free surface
复制标题
自由表面二维流体力学中的短分支切割近似
DOI:
10.1098/rspa.2020.0811
复制
发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Zakharov, V. E.
中科院分区:
文献类型:
--
作者:
Dyachenko, A. I.;Dyachenko, S. A.;Lushnikov, P. M.;Zakharov, V. E.
A potential motion of ideal incompressible fluid with a free surface and infinite depth is considered in two-dimensional geometry. A time-dependent conformal mapping of the lower complex half-plane of the auxiliary complex variablewinto the area filled with fluid is performed with the real line ofwmapped into the free fluid’s surface. The fluid dynamics can be fully characterized by the motion of the complex singularities in the analytical continuation of both the conformal mapping and the complex velocity. We consider the short branch cut approximation of the dynamics with the small parameter being the ratio of the length of the branch cut to the distance between its centre and the real line ofw. We found that the fluid dynamics in that approximation is reduced to the complex Hopf equation for the complex velocity coupled with the complex transport equation for the conformal mapping. These equations are fully integrable by characteristics producing the infinite family of solutions, including moving square root branch points and poles. These solutions involve practical initial conditions resulting in jets and overturning waves. The solutions are compared with the simulations of the fully nonlinear Eulerian dynamics giving excellent agreement even when the small parameter approaches about one.
登录
查看更多内容
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
D. Meiron;S. Orszag;M. Israeli
通讯作者:
M. Israeli
DOI:
10.1007/978-3-319-32916-1
发表时间:
2016
期刊:
Numerical Modeling of Sea Waves
影响因子:
--
作者:
D. Chalikov
通讯作者:
D. Chalikov
影响因子:
1.1
作者:
Zubarev, N. M.;Lushnikov, P. M.
通讯作者:
Lushnikov, P. M.
影响因子:
2.7
作者:
S. Dyachenko;P. Lushnikov;A. D. F. Mathematics;U. I. Urbana-Champaign;Usa;-. D. O. Mathematics;U. Arizona;Statistics;U. N. Mexico;-. M. I. O. Physics;Russia.
通讯作者:
S. Dyachenko;P. Lushnikov;A. D. F. Mathematics;U. I. Urbana-Champaign;Usa;-. D. O. Mathematics;U. Arizona;Statistics;U. N. Mexico;-. M. I. O. Physics;Russia.
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
Pavel M. Lushnikovy
通讯作者:
Pavel M. Lushnikovy