The purpose of this book is to gather contributions from scientists
in fluid mechanics who use asymptotic methods to cope with
difficult problems. The selected topics are as follows: vorticity
and turbulence, hydrodynamic instability, non-linear waves,
aerodynamics and rarefied gas flows. The last chapter of the book
broadens the perspective with an overview of other issues
pertaining to asymptotics, presented in a didactic way.