This study explores the dynamics of active rodlike particles in flow systems, focusing on the active particles-fluid interactions and particles accumulation induced by anisotropic translational diffusion. Numerical simulations based on the work of Mezi et al. [1] are used to analyse the results. In Poiseuille flow, active rods are accumulated at the walls with high alignment in the flow direction and nematic order in the wall directions. A circular obstacle is introduced in the Poiseuille flow which develops non-homogeneous flow. The results of this study offer important new understandings into the intricate behavior of suspended active rods under various flow conditions.