Physics – Fluid Dynamics
Scientific paper
2012-01-25
Physica D: Nonlinear Phenomena, Volume 240 (2011), Issue 13, p.1069-1079
Physics
Fluid Dynamics
29 pages, 7 figures
Scientific paper
In this work we found the new class of exact stationary solutions for 2D-Euler equations. Unlike of already known solutions, the new one contain complex singularities. We consider as complex, point singularities which have the vector field index greater than one. For example, the dipole singularity is complex because its index is equal to two. We present in explicit form a large class of exact localized stationary solutions for 2D-Euler equations with the singularity which index is equal to three. The obtained solutions are expressed in terms of elementary functions. These solutions represent complex singularity point surrounded by vortex satellites structure. We discuss also motion equation of singularities and conditions for singularity point stationarity which provides the stationarity of complex vortex configuration.
Kulik K. N.
Tur Anatoly V.
Yanovsky Victor
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