Question

Differentiate skin friction and form friction

Answer 1

Drag due to skin friction consists of that part of the drag that pulls the surface of the body tangentially. Form drag consists of that part of the drag that pushes the body in normally.

Answer 2

Skin friction and form friction:

• Skin friction is defined as the friction at the surface of a solid and fluid in relative motion.

• It is the friction between a fluid surface and a solid surface moving through it  

• Form friction is mainly caused by the division of the boundary layer from a surface. It is chiefly reliant upon the shape of the object.

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