arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0812.3894math-phmath.DSmath.MP
收藏

不可压缩平面流体的点源与涡的相互作用

Interaction of point sources and vortices for incompressible planar fluids

Ernesto A. Lacomba

摘要:

本文考虑一个新的微分方程组,它同时是梯度和局部Hamilton的。它是通过在N点涡的相互作用方程中替换一个因子而得到的,并解释为N点源的相互作用。由于局部哈密顿结构和它所服从的对称性,它确实具有一些出现在N涡问题中的第一积分。我们将证明,在这种情况下,由于运动方程是一阶的,所以二元碰撞很容易被炸毁。这种方法可以很容易地推广到高阶碰撞的爆破问题。然后,我们推广的模型进一步的源和涡的相互作用。

英文摘要:

We consider a new system of differential equations which is at the same time gradient and locally Hamiltonian. It is obtained by just replacing a factor in the equations of interaction for N point vortices, and it is interpreted as an interaction of N point sources. Because of the local Hamiltonian structure and the symmetries it obeys, it does possess some of the first integrals that appear in the N vortex problem. We will show that binary collisions are easily blown up in this case since the equations of motion are of first order. This method may be easily generalized to the blow up of higher order collisions. We then generalize the model further to interactions of sources and vortices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑