The study of dispersed laminar gas-particle flow in a horizontal channel is carried out using finite volume method on unstructured grid. In this context, Eulerian-Eulerian two-fluid model is employed to analyze the flow behaviour of both the phases inside the flow domain. The interaction between the gas phase and the particle phase is taken care by introducing the drag force term in their governing equations. The behavior of the particle phase when released at a low velocity into a uniform fluid flow is analyzed for particles having different sets of diameters. It has been found that for the particles of same material density, particle diameter plays an important role in the amount of drag force experienced by the particle phase dispersed in a continuous fluid medium. © Springer India 2017.