Paradoxes in Aerohydrodynamics

The first part is devoted to the study of channel flows, in particularthe lateral flow of a viscous and viscous-plastic liquid in a ring channelformed by coaxial cylinders.

This book, on the general topic of hydroaerodynamics, investigates anumber of exciting applications in this field, addressing specifically issuesthat allow seemingly paradoxical issues to be dealt with. The first part is devoted to the study of channel flows, in particularthe lateral flow of a viscous and viscous-plastic liquid in a ring channelformed by coaxial cylinders. Specifically, the problem of dissipation ofmechanical energy in channel flows of highly viscous liquids is addressed andsolved. Furthermore, the mechanism leading to hydrodynamic erosion inintra-field pipelines (known as "channelized effect") is identified. Subsequently, a theory for channel flows with mass transfer through porous wallsis developed. In the second part, viscous liquid free flows (jets) are investigated. In particular, a dispersion law for turbulent flow is derived and the existenceof dynamic invariance in wake flows of variable density is demonstrated. The third part presents new insights from both theoretical andexperimental research into concentrated vortex structure formation anddevelopment. The conditions for the existence of Taylor-Goertler vortices aredetermined and the mechanism for their formation is described. Last but notleast, the theory of vortex rings, a particularly interesting problem inhydroaerodynamics, is introduced in the last section of this book. Care has been taken, when selecting original theoretical problems ofinterest, to make the link with related topics in the published literature. Atthe same time, all experimental research described in this book is given ameaningful physical interpretation and corroborated by suitable theoreticalmodels and computations.