2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/205538In this letter we study a model of interaction between the scalar field and an inhomogeneous ideal fluid. We have considered two forms of the ideal fluid and a power law expansion for the scale factor. We have solved the equations for the energy densities. Also we show that besides being a dark energy model to explain the cosmic acceleration, this model shows a decaying nature of the scalar field potential and the interaction parameter.6 latex pages, 4 figures, RevTeX styleGeneral Relativity and Quantum Cosmologytext