arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1303.3548nlin.SImath-phmath.APmath.MP
收藏

广义Burgers方程的Lie对称性:在边值问题中的应用

Lie symmetries of generalized Burgers equations: application to boundary-value problems

O. O. Vaneeva, C. Sophocleous, P. G. L. Leach

摘要:

有几种方法利用李对称性在减少边值问题的偏微分方程建模现实世界的现象,这些问题的常微分方程。本文以非线性声学中出现的广义Burgers方程为例,说明了Bluman首次提出的利用Lie对称性求解边值问题的“直接”方法比Moran和Gaggioli在[J.Eng.Math.3(1969),151-162]中提出的方法更一般和直接。在对一类粘性随时间变化的广义Burgers方程进行群分类后,利用所得到的对称性解了相应的边值问题。

英文摘要:

There exist several approaches exploiting Lie symmetries in the reduction of boundary-value problems for partial differential equations modelling real-world phenomena to those problems for ordinary differential equations. Using an example of generalized Burgers equations appearing in nonlinear acoustics we show that that the "direct" procedure of solving boundary-value problems using Lie symmetries firstly described by Bluman is more general and straightforward than the method suggested by Moran and Gaggioli in [J. Eng. Math. 3 (1969), 151-162]. After the group classification of a class of generalized Burgers equations with time-dependent viscosity is performed we solve an associated boundary-value problem using the symmetries obtained.

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。

↑