In this study, after introducing the concept of smartening and examining various models of how to do this, a cantilever beam has been used for the smartening,using MATLAB. Then, the smart code is applied to the desired airfoil and after the flap modeling process, at different flap angles, the meshing process using the H-grid method was done in Gambit software. The flow is assumed to be constant, turbulent, adiabatic and incompressible, and the equation solving algorithm is selected pressure-based. The reason for the three-dimensional study in this research is to create more accurate simulation conditions and to consider three-dimensional effects. In addition, due to the special position the wing is attached to the body at the root, modeling the wing separately imposes a lot of complexity. The turbulence model is also considered k-ε. In this research, the performance of the smart flap has been investigated in both near ground and open conditions. Comparison of the results and aerodynamic characteristics of the wing with the smart flap and the wing with the normal flap in Fluent software, shows that the lift coefficient has increased significantly (about 16%), but the changes in the drag coefficient are very small. Finally, it has led to a significant improvement in the ratio of lift to drag (L/D). Also, the study of pressure and velocity gradients at different sections shows that the intelligentization process is very successful and has a better distribution compared to conventional flaps.