The Full Nonlinear Vortex Tube-Vorton Method: the post-stall condition

Abstract: The original concepts behind The Full Nonlinear Vortex Tube-Vorton Method (FTVM) have been applied to the study of massively separated fluid flow past a thin body. In the pre-stall condition, the Kutta-Zhukovski (KJ) force calculation was successfully implemented. However, for the post-stall condition, this approach is not capable of capturing the form drag component. Thus, an alternative force calculation method is implemented. The results obtained demonstrate that the fluid motion involving complex wake dynamics can be accurately approximated by a low-order, low-discretization numerical method based purely on vorticity and velocity concepts. This method avoids the need to discuss and speculate about the role of pressure on fluid motion, even in the turbulent regime. Consequently, it simplifies the understanding of complex low-speed aerodynamics by returning to the first principles.