What is another word for skin friction?
Pronunciation: [skˈɪn fɹˈɪkʃən] (IPA) 
Skin friction is an important concept in fluid dynamics and refers to the resistance that occurs between a fluid and a solid surface that it is in contact with. This can be caused by a range of factors, including the roughness of the surface, the pressure of the fluid moving over it, and the viscosity of the fluid itself. There are a few different terms that can be used to describe this type of friction, including wall shear, drag, and boundary layer resistance. Each of these terms refers to slightly different aspects of the friction that occurs between a fluid and a solid surface, but they are all important concepts to understand in order to properly model and predict fluid dynamics.
