This document provides lecture notes on two-dimensional flow of real fluids. It discusses the following key points in 3 sentences: The flow field is divided into a viscous sublayer zone close to boundaries, where velocity gradients are high, and a potential flow zone away from boundaries, where gradients are small. The Navier-Stokes equations, which include viscosity effects, govern flow in the sublayer zone, while potential flow equations can be used in the outer zone. Laminar flow between parallel plates and in circular pipes is analyzed using the Navier-Stokes equations, yielding parabolic and paraboloid velocity profiles respectively.