A modified wall function for simulation of flow fields over non-smooth surfaces

The aerodynamic benefits of non-smooth surfaces, such as drag reduction, are well-established, but accurately simulating their effects poses significant challenges due to increased modeling complexity and computational demands. This paper introduces an enhanced simulation method tailored for analyzing the near-wall flow fields of non-smooth surfaces. By developing a modified wall function, the proposed method replicates the flow characteristics of non-smooth surfaces on smooth walls, thereby simplifying the simulation process. The results demonstrate a marked improvement in computational efficiency, with a reduction in simulation time by more than 20%, without compromising accuracy. This approach offers a robust and efficient tool for aerodynamic optimization in engineering applications.