This lecture is on internal forced convection (Chapter 8). It addresses average velocity and temperature profiles and the entrance region. The low definition lecture is on Lecture 14 (2017) LD, and high definition on Lecture 14 (2017) HD. This lecture is Lecture 14 (2017) is one of five lectures based on the textbook of Cengel and Ghajar (5th edition) and was presented as part of a heat transfer class to the fourth-year students of the Department of Mechanical and Aeronautical Engineering by Prof Josua Meyer, Head of the Department of Mechanical and Aeronautical Engineering of the University of Pretoria, South Africa. The lecture was presented on 22 March 2017.