The aim of this work is to investigate the influence of the angular momentum in aerodynamic for problem of flow separation and study some the numerical schemes that we can use to solute received equations. We received non-symmetric tensor from investigation of continuous mechanics and from kinetic theory. In a modified theory, the laws of conservation in integral form remain the same, but the divergent and rotational components are not distinguished. The correspondence between the potential flow with velocity circulation, Newton law and the equations by Euler is discussed for investigation problem of flow separation. The analysis of the influence of the moment on the separation of the flow is carried out. Some numerical schemes which can be used to calculate modified equations, based on the Runge-Kutta method for approximating an time's operator are analyzed.