Vortex structures with complex points singularities in two-dimensional Euler equations. New exact solutions

2011 ◽  
Vol 240 (13) ◽  
pp. 1069-1079 ◽  
Author(s):  
Anatoly Tur ◽  
Vladimir Yanovsky ◽  
Konstantin Kulik
Keyword(s):  
Exact Solutions ◽  
Euler Equations ◽  
Vortex Structures ◽  
Two Dimensional ◽  
New Exact Solutions

scholarly journals New Classes of Solutions of Dynamical Problems of Plasticity

2020 ◽  
pp. 792-796
Author(s):  
Sergei I. Senashov ◽  
Olga V. Gomonova ◽  
Irina L. Savostyanova ◽  
Olga N. Cherepanova
Keyword(s):  
Exact Solution ◽  
Differential Equations ◽  
Exact Solutions ◽  
Boundary Value Problems ◽  
Plastic Layer ◽  
Two Dimensional ◽  
Science And Engineering ◽  
Spatial Variables ◽  
One Dimensional ◽  
New Exact Solutions

Dynamical problems of the theory of plasticity have not been adequately studied. Dynamical problems arise in various fields of science and engineering but the complexity of original differential equations does not allow one to construct new exact solutions and to solve boundary value problems correctly. One-dimensional dynamical problems are studied rather well but two-dimensional problems cause major difficulties associated with nonlinearity of the main equations. Application of symmetries to the equations of plasticity allow one to construct some exact solutions. The best known exact solution is the solution obtained by B.D. Annin. It describes non-steady compression of a plastic layer by two rigid plates. This solution is a linear one in spatial variables but includes various functions of time. Symmetries are also considered in this paper. These symmetries allow transforming exact solutions of steady equations into solutions of non-steady equations. The obtained solution contains 5 arbitrary functions

Some new exact solutions for the two-dimensional Navier–Stokes equations

2007 ◽  
Vol 371 (5-6) ◽  
pp. 438-452 ◽  
Author(s):  
Chiping Wu ◽  
Zhongzhen Ji ◽  
Yongxing Zhang ◽  
Jianzhong Hao ◽  
Xuan Jin
Keyword(s):  
Exact Solutions ◽  
Stokes Equations ◽  
Navier Stokes ◽  
Two Dimensional ◽  
Navier Stokes Equations ◽  
New Exact Solutions

A Simplified Algorithm for Finding Partially Invariant Solutions of Quasilinear Systems

1994 ◽  
Vol 49 (3) ◽  
pp. 458-464
Author(s):  
Dirk-A. Becker
Keyword(s):  
Exact Solutions ◽  
Euler Equations ◽  
Similarity Solutions ◽  
Similarity Analysis ◽  
Two Dimensional ◽  
Invariant Solutions ◽  
Partially Invariant Solutions ◽  
Quasilinear Systems ◽  
Pde Systems ◽  
Simplified Algorithm

Abstract The method of partially invariant solutions of PDE systems was introduced by Ovsiannikov as a generalization of the classical similarity analysis. It offers a possibility to calculate exact solutions possessing a higher degree of freedom than similarity solutions. Ovsiannikov's algorithm, however, is somewhat hard to apply because one has to deal with three equation systems derived from the original PDE system. By means of the two-dimensional Euler equations, we show how the algorithm can be essentially simplified if classical similarity solutions are already known. Further, we prove a necessary criterion for the simplified algorithm to be senseful.

scholarly journals Exact Solutions of the Two-Dimensional Cattaneo Model Using Lie Symmetry Transformations

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Khudija Bibi ◽  
Khalil Ahmad
Keyword(s):  
Differential Equation ◽  
Differential Equations ◽  
Exact Solutions ◽  
Ordinary Differential Equations ◽  
Lie Symmetry ◽  
Two Dimensional ◽  
Linear Combinations ◽  
Similarity Transformations ◽  
New Exact Solutions ◽  
Symmetry Transformations

In this article, symmetry technique is utilized to obtain new exact solutions of the Cattaneo equation. The infinitesimal symmetries, linear combinations of these symmetries, and corresponding similarity variables are determined, which lead to many exact solutions of the considered equation. By applying similarity transformations, the mentioned partial differential equation is reduced to some ordinary differential equations of second order. Solutions of these ordinary differential equations have yielded many exact solutions of the Cattaneo equation.

On Chaplygin's investigations of two-dimensional vortex structures in an inviscid fluid

1994 ◽  
Vol 272 ◽  
pp. 157-182 ◽  
Author(s):  
V.V. Meleshko ◽  
G.J.F.van Heijst
Keyword(s):  
Exact Solutions ◽  
Pure Shear ◽  
Continuous Distribution ◽  
Vortex Structures ◽  
Inviscid Fluid ◽  
Two Dimensional ◽  
Exterior Field ◽  
Circular Trajectory ◽  
Straight Path ◽  
Vortex Dipole

This paper describes exact solutions of two-dimensional vortex structures that were published by Chaplygin (1899, 1903) at the turn of the last century, which seem to have escaped the attention of later investigators in this field. Chaplygin's solutions include that of an elliptical patch of uniform vorticity in an exterior field of pure shear and that of a (symmetric or non-symmetric) dipolar vortex with a continuous distribution of vorticity translating steadily along a straight path. In addition, a solution is presented for a non-symmetric vortex dipole moving along a circular trajectory. A concise account of Chaplygin's solutions is given, complemented by a more detailed analysis of some of their relevant properties.

scholarly journals New Soliton Solutions of The Nonlinear Radhakrishnan-Kundu-Lakshmanan Equation With the Beta-Derivative

2021 ◽  
Author(s):  
Yusuf Pandir ◽  
Yusuf Gurefe ◽  
Tolga Akturk
Keyword(s):  
Exact Solutions ◽  
Rational Function ◽  
Function Method ◽  
Three Dimensional ◽  
Soliton Solutions ◽  
Dark Soliton ◽  
Two Dimensional ◽  
New Exact Solutions ◽  
Definition Of ◽  
Exponential Function Method

Abstract In this article, the modified exponential function method is applied to find the exact solutions of the Radhakrishnan-Kundu-Lakshmanan equation with Atangana’s conformable beta-derivative. The definition of the conformable beta derivative and its properties proposed by Atangana are given. With the proposed method, exact solutions of the nonlinear Radhakrishnan-Kundu-Lakshmanan equation which can be stated with the conformable beta-derivative of Atangana are obtained. The exact solutions found as a result of the application of the method seem to be 1-soliton solutions, dark soliton solutions, periodic soliton solutions and rational function solutions. According to the obtained results, we can say that the Radhakrishnan-Kundu-Lakshmanan equation with Atangana’s conformable beta-derivative have different soliton solutions. Also, three-dimensional contour and density graphs and two- dimensional graphs drawn with different parameters are given of these new exact solutions.

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