1. Introduction 1.1 Preliminaries 1.2 Differential Equations, Initial and Boundary Conditions 1.3 Major Assumptions 1.4 Vorticity—Dynamic Formulation References 2. Theorems of Helmholtz and Kelvin 2.1 Introduction 2.2 Kinematic—Kinetic Partition of Flow Problem 2.3 Kinematic Preliminaries 2.4 Helmholtz' First Vortex Theorem 2.5 Vorticity Loops 2.6 Kelvin's Theorem 2.7 Helmholtz' Second Vortex Theorem 2.8 Concluding Remarks References 3. Vorticity Kinematics 3.1 Differential Equations of Vorticity Kinematics 3.2 Vector Identities 3.3 Poisson's Equation and Integral Representations 3.4 Poisson's Equation and Boundary Conditions 3.5 Law of Biot—Savart 3.6 Generalized Law of Biot—Savart 3.7 Uniqueness of Solution 3.8 Boundary Conditions in Vorticity Kinematics References 4. Vorticity Kinetics 4.1 Navier—Stokes Momentum Equation 4.2 Convection and Material Derivative 4.3 Viscous Force and Diffusion of Momentum 4.4 Vorticity and Flow Regions 4.5 Appearance and Transport of Vorticity 4.6 Speeds of Vorticity Transport 4.7 Boundary Conditions in Vorticity Kinetics ……