In this chapter we formulated the vortex methods for inviscid flows
in section 3.1 and described the convection of
the vortices. We then formulated the vortex method
for viscous flows in 3.2.
The convection step in section
3.2 can be handled numerically in a
mesh-free manner [36,97,233].
Further, for the easier handling of flows over complicated geometries,
the diffusion step must also be solved using
a mesh-free procedure; we will describe that in the next chapter.
