RT journal article T1 Lie symmetries and equivalence transformations for the Barenblatt-Gilman model A1 Garrido Letrán, Tamara María A1 Kasatkin, A.A. A1 Bruzón Gallego, María de los Santos A1 Gazizov, R.K. A2 Matemáticas K1 Barenblatt-Gilman equation K1 Lie group analysis K1 equivalence transformations K1 travelling wave solutions AB In this paper we have considered the Barenblatt-Gilman equation which models the nonequilibrium countercurrent capillary impregnation. The equation of this model is a third-order equation and the unknown function concerns to the effective water saturation. We have applied the classical method to get the Lie group classification with respect to unknown function and we have constructed the equivalence transformations. We have also obtained the invariant solutions for some forms of the equation, including travelling wave solutions based on the Jacobi elliptic sine function. PB Elsevier SN 0377-0427 YR 2017 FD 2017-07-01 LK http://hdl.handle.net/10498/27013 UL http://hdl.handle.net/10498/27013 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 21-sep-2026