Lie symmetry method provides a powerful general technique for analyzing nonlinear PDEs and reducing them to ODEs. PDEs modeling physical processes naturally inherit symmetries from the underlying physical system. Lie symmetry method takes advantage of these natural symmetries in a PDE and provides similarity variables that lead to the reduction to ODEs; compare, for example, [2–4]. A large amount of the literature about the Lie symmetry theory, its applications, and its extensions is available; see, for example