COMPLIMENTARY CHAPTERS OF TURBULENCE THEORY. HELICAL TURBULENCE
The textbook is based on the lectures for students of the department of the space physics at Moscow Institute of Physics and technology (State University). The manual includes chapters which are not covered in existing textbooks. The role of helicity. The textbook is useful for students and postgraduates who are major in hydrodynamics. Role of helicity of homogeneous turbulent flow in generation of large scale structures is discussed. Mean-field hydrodynamics for turbulent flows suspended with solid particles or gas bubbles, for turbulent shear flows and in turbulent flows with propagating sound waves is described. Main attention is given to physical phenomena initiated by helicity of turbulent flow. It is shown that presence of helicity in turbulent flow lead to generation of large scale structures in multi-phase and shear flows. Helicity may lead to transformation of sound waves in vertical flows when propagating in turbulence. The textbook is useful for students and postgraduates who are major in hydrodynamics.