In this work, we apply the Lattice Boltzmann (LBM) method to simulate the chemical reaction processes that occur in the interaction between the fluid and the solid phase, modifying the porous medium. For this, we will present how the LBM method approaches fluid flow simulation in an irregular porous medium for cases of one or more fluids, including the chemical dissolution process. Based on the previous processes, we propose a modification where dissolution can occur as a characteristic of the fluid that interacts with the solid phase. By approaching dissolution as a characteristic of the interaction of the fluid with the solid phase, it is possible to better understand how the fluid can modify the geometry of the porous medium and impact the flow changes. The modification proposal was evaluated in some cases where the flow in the porous medium is well defined: the open channel, a channel with cylinders, and a porous medium with complex geometry. The proposal was extended to the simulation in a 3D porous medium, where we analyzed how the dissolution was impacted by external forces such as gravity.