Azimuthally averaged surface density after 1000 orbits and three different values of α-turbulence for a gap created by a planet located in a fixed orbit at 20 AU of 1 M_Jup in a flared disk (top-left), 9 M_Jup in a flared disk (top-right), 1 M_Jup in a wedge disk (bottom-left) and 9 M_Jup in a wedge disk (bottom-right). The peak of the gas surface density at the position of the planet is due to the strong gravitational effect of the massive planet on the gas of the disk.