Group properties and invariant solutions of a sixth-order thin film equation in viscous fluid

Details Group properties and invariant solutions of a sixth-order thin film equation in viscous fluid Group properties and invariant solutions of a sixth-order thin film equation in viscous fluid

2012-02-23

arxiv.org/abs/1202.5138v1

Physics

Mathematical Physics

8 pages

Scientific paper

Using group theoretical methods, we analyze the generalization of a one-dimensional sixth-order thin film equation which arises in considering the motion of a thin film of viscous fluid driven by an overlying elastic plate. The most general Lie group classification of point symmetries, its Lie algebra, and the equivalence group are obtained. Similar reductions are performed and invariant solutions are constructed. It is found that some similarity solutions are of great physical interest such as sink and source solutions, travelling-wave solutions, waiting-time solutions, and blow-up solutions.

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