A master's thesis in the College of Engineering at the University of Basrah discussed (a numerical and experimental study of the effect of a longitudinal groove extension on wing properties)
The thesis presented by the student Mahdi Sahib Mahdi dealt with the study of the semi-circular groove in different locations
Away from the front edge. The flow case was also studied at different speeds 10-15-20.25 m / s on the NACA0012 suite using the Ansys program to confirm the work. The experimental test was conducted in a subsonic wind tunnel with different speeds
 (10-25) m / s and different angles of attack (2, 0, 4, 12, 10, 8, 6 and 14).
The objective of the thesis is to study numerically and experimentally the effect of longitudinal groove extension on wing properties
The thesis concludes that the Cp of the wing at low speeds has a smaller peak than the smooth surfaces of all groove modes. At high speeds, the location of the groove is impact
Slight on Cp and showing some improvement. For the Cd term, the groove has the effect of reducing the drag coefficient and improving the Cd/Cl ratio, but this effect decreased with increasing free flow velocities