The aim of the present study is to investigate the effect of turbulence models on the 2D and 3D simulation of the wing in the ground effect. A pressure-based algorithm is used to solving Navier Stokes equations on a nonorthogonal mesh with collocated finite volume formulation for incompressible flows. The procedure incorporates several eddy-viscosity turbulence models for simulation of the ground effect. In this study 3D simulation around the wing with airfoil-NACA 6409 section are compared with experimental data. Also in 2D simulation the flow around NACA0015 airfoil has been investigated for different turbulence models. The RANS turbulence models is used in this research for 2D and 3D cases and various aerodynamic parameters has been studied in the different ground clearances and angle of attacks. Computation visualization of the flows shows that the turbulent models have more effect on the simulation in the small ground clearance. The result shows that Spalart- Allmarast is interested for 2D and 3D cases because of its simplification and its good agreement with experimental results.

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