What Is Fluid Turbulence?

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This book introduces an innovative wave structure theory of turbulence, highlighting a significant advancement in turbulence parameters for optimal self-organization derived from theoretical investigations and information entropy assessments. The new theoretical findings align closely with experimentally validated results in turbulent convection velocity fields under both free and forced turbulence conditions. It challenges the conventional understanding of the logarithmic wall law by demonstrating the absence of a viscous sublayer. The text addresses the oscillation problem of turbulence and offers solutions for boundary value tasks across various technically relevant turbulent flows, such as smooth and rough pipe flow, confusor and diffuser flow, swirl flow, stirrer flow, inlet flow, intermittency, wake flow, and free jets. An epistemological aspect of the theory involves representing turbulence through contravariant vector fields, which exhibit stable turbulence structures despite changes in structural density. These structures serve as active momentum transmitters of refracted monopoles, dipoles, tripoles, and quadrupoles within the flow field. Additionally, the book qualitatively and quantitatively describes the dissipation mechanism in turbulence structures. It explores the transition from contravariant to covariant convection velocity fields, which induces refraction and entanglement. The principles governing turbulence