The sedimentation process of ideal suspensions is simulated using a discrete model in which gravitational, hydrodynamic, particle interaction and dispersive motions are considered as competitive processes. These mechanisms define motion rules that are implemented in regular two-dimensional lattices. Results show that the model is capable of producing the whole spectrum of particle-settling of ideal suspensions. Computer simulation results for the batch settling of rigid spheres in water are obtained for monodisperse systems. Results compared fairly well with experimental data.