Integrable hierarchy covering the lattice Burgers equation in fluid mechanics: N-fold Darboux transformation and conservation laws
首发时间:2012-05-16
Abstract:Burgers-type equations can describe some phenomena in fluids, plasmas, gas dynamics, traffic, etc. In this paper, an integrable hierarchy covering the lattice Burgers equation is derived from a discrete spectral problem. N-fold Darboux transformation (DT) and conservation laws for the lattice Burgers equation are constructed based on its Lax pair. N-soliton solution in the form of Vandermonde-like determinant is derived via the resulting DT with symbolic computation, structures of those solutions are shown graphically. Coexistence of the elastic-inelastic interaction phenomenon among the three solitons is firstly reported for the lattice Burgers equation, even if the similar phenomenon for certern continuous systems appears in literature. Results in this paper might be helpful for understanding some ecological problems describing the evolution of competing species and the propagation of nonlinear waves in fluids.
keywords: Discrete spectral problem Lattice Burgers equation N-fold Darboux transformation Conservation laws Symbolic computation
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晶格Burgers方程的可积梯队,N波Darboux变换和守恒律
摘要:根据一个给定的离散谱问题,构建了晶格Burgers方程的可积梯队,N波Darboux变换和守恒律,通过应用Darboux变换,得到晶格Burgers方程的Vandermonde行列式形式的N孤子解,讨论了二孤子和三孤子之间的弹性作用和非弹性作用共存现象。
关键词: 离散谱问题 晶格Burgers方程 N波Darboux变换 守恒律 符号计算
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