Conservation laws for one-layer shallow water wave systems


YAŞAR E. , Özer T.

NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS, vol.11, no.2, pp.838-848, 2010 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 11 Issue: 2
  • Publication Date: 2010
  • Doi Number: 10.1016/j.nonrwa.2009.01.028
  • Title of Journal : NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS
  • Page Numbers: pp.838-848
  • Keywords: Conservation laws, Symmetry groups, Shallow water wave systems, PARTIAL-DIFFERENTIAL EQUATIONS, INVARIANT SOLUTIONS, SYMMETRIES

Abstract

The problem of correspondence between symmetries and conservation laws for one-layer shallow water wave systems in the plane flow, axisymmetric flow and dispersive waves is investigated from the composite variational principle of view in the development of the study [N.H. lbragimov, A new conservation theorem, journal of Mathematical Analysis and Applications, 333(1) (2007) 311-328]. This method is devoted to construction of conservation laws of non-Lagrangian systems. Composite principle means that in addition to original variables of a given system, one should introduce a set of adjoint variables in order to obtain a system of Euler-Lagrange equations for some variational functional. After studying Lie point and Lie-Backlund symmetries, we obtain new local and nonlocal conservation laws. Nonlocal conservation laws comprise nonlocal variables defined by the adjoint equations to shallow water wave systems. In particular, we obtain infinite local conservation laws and potential symmetries for the plane flow case. (C) 2009 Elsevier Ltd. All rights reserved.