In aerodynamics, aerodynamic drag is the fluid drag force that acts on any moving solid body in the direction of the fluid freestream flow. From the body's perspective (near-field approach), the drag comes from forces due to pressure distributions over the body surface, symbolized, and forces due to skin friction, which is a result of viscosity, denoted . Alternatively, calculated from the flowfield perspective (far-field approach), the drag force comes from three natural phenomena: shock waves, vortex sheet, and viscosity.
Read more about Aerodynamic Drag: Introduction, Theoretical Aspects of Far-field/near-field Balance
Famous quotes containing the word drag:
“The moon, also, is merciless: she would drag me
Cruelly, being barren.
Her radiance scathes me. Or perhaps I have caught her.”
—Sylvia Plath (1932–1963)