This conference is the sixth in the series started in Cambridge in 1991 and continued in Warsaw (1994), Göttingen (1997), Eindhoven (2000) and Toulouse (2003). The conference aims at covering the whole field of Fluid Dynamics, ranging from most fundamental aspects to recent applications. It provides a unique opportunity for fluid dynamicists to see what is going on in this very active field in Europe and to exchange their views on recent developments in a quite informal manner.