Colloid retention in porous media in the presence of an energy barrier to deposition is strongly influenced by wedging within the grain to grain contacts and retention in flow stagnation zones. Development of accurate near-surface flow fields for colloid transport simulation is challenging, especially in grain to grain contact zones due to the fine discretization required. This paper presents generation of a volumetric 3-D mesh for computational fluid dynamics (CFD) and simulation of the fluid flow field. Simulated colloid trajectories will be compared between the CFD-generated flow field and semi-analytical solutions for the flow field. These simulations will also be compared to experimental results for colloid retention in the presence of an energy barrier.