Varuvel, E.G.Sonthalia, A.Aloui, F.Saravanan, C.G.2024-05-192024-05-19202397804431901799780443190186https://doi.org/10.1016/B978-0-443-19017-9.00033-7https://hdl.handle.net/20.500.12713/4318This chapter discusses the mechanism of heat transfer through the motion of the bulk fluid also known as convection. This heat transfer can be either forced or free depending on how the initiation of the fluid motion takes place. In forced convection, a pump or a fan is used to force the fluid to flow through a pipe or over a surface. While fluid motion by natural means such as buoyancy (warmer fluid rises) takes place in natural convection. Another way of classifying convection is it can be either external or internal. When a fluid flows over a surface it is known as external flow and when it flows through a duct it can be classified as internal flow. © 2023 Elsevier Inc. All rights reserved.eninfo:eu-repo/semantics/closedAccessConvectionHeat TransferThermodynamicsBook Chapter35772-s2.0-8517684741510.1016/B978-0-443-19017-9.00033-7N/A