**2. CFD Methodology**

The RNG k-epsilon two-equation turbulence model has high precision and accuracy in solving high-Reynolds-number clearance flows. We found out that the deflection of the main flow can also be captured with the RNG k-epsilon model. Thus, the RNG k-epsilon two-equation turbulence model is adopted in this study. Due to the large amounts of calculations, we will perform a comparative study of other turbulence models in the future.
