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Shear flow The term shear flow is used in solid mechanics as well as in fluid dynamics. The expression ''shear flow'' is used to indicate: * a shear stress caused by torsion on a closed, thin-walled tube (in solid mechanics);〔Higdon, Ohlsen, Stiles and Weese (1960), ''Mechanics of Materials'', article 4-9 (2nd edition), John Wiley & Sons, Inc., New York. Library of Congress CCN 66-25222〕 * the flow ''induced'' by a force (in a fluid). ==In solid mechanics== In solid mechanics, the shear flow ''q'' in a closed, thin-wall tube is defined as the internal shearing force ''V'' per unit of length of the perimeter around a thin section. Shear flow has the dimensions of force per unit of length.〔 This corresponds to units of newtons per meter in the SI system and pound-force per foot in the English Engineering and British Gravitational Systems.
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