Abstract
This paper is devoted to the detailed study one of the models, obtained in [Hematulin A, Meleshko SV, Gavrilyuk SG. Group classification of one-dimensional equations of fluids with internal inertia. Math Meth Appl Sci 2007;30:2101–20] by group analysis. The main feature of this model is that the equations describing the motion of fluids with the potential function W=-αρ-3ρ˙2+βρ3 admit projective transformations. Optimal systems of subalgebras are constructed. Representations of all invariant solutions are obtained.
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