Interparticle cohesion plays a crucial role in micro-to-macro responses of geomaterials such as wet sands, cemented soils and clay-granular mixtures. Various cohesive contact models have been developed in particle-scale contact physics, but the question of how different cohesive concepts and models can lead to different micro-structures and macroscale variables remains unclear. To clarify this issue, this paper uses DEM simulation of drawdown test on wet sand to examine two typical cohesive concepts, i.e., the simplified Johnson-Kendall-Roberts (SJKR) and liquid-bridge (LB) models. The simulation results are validated with experimental data based on key time-dependent macroscale features such as the shape and flow rate before an extensive assessment on the micro-structure is implemented. The results show that there are significant differences in micro-structure and contact behaviour of material when using different cohesive contact models, despite both giving good agreement with experimental results in macro-shape features. The outcomes of this study suggest the importance of using a proper cohesive contact model in the DEM simulation of geomaterials.