Surface friction: Difference between revisions

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|Meaning=Resistance to movement of air flowing along the surface of the earth or other surface  such as an airplane wing.
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|Explanation=The total [[drag]] at the surface is a combination of [[skin drag]] due to [[viscosity]], [[form drag]] due  to [[pressure]] forces created as the [[wind]] hits roughness elements, and [[gravity wave drag]] in the  case of [[static stability|statically stable]] air. In the [[atmosphere]], surface friction is related to turbulent drag. <br/>''Compare''  [[friction velocity]], [[drag coefficient]], [[Reynolds stresses|Reynolds stress]].
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== surface friction ==
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<div class="definition"><div class="short_definition">Resistance to movement of air flowing along the surface of the earth or other surface  such as an airplane wing.</div><br/> <div class="paragraph">The total [[drag]] at the surface is a combination of [[skin drag]] due to [[viscosity]], [[form drag]] due  to [[pressure]] forces created as the [[wind]] hits roughness elements, and [[gravity wave drag]] in the  case of [[static stability|statically stable]] air. In the [[atmosphere]], surface friction is related to turbulent drag. <br/>''Compare''  [[friction velocity]], [[drag coefficient]], [[Reynolds stresses|Reynolds stress]].</div><br/> </div>
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Latest revision as of 09:46, 30 March 2024

Resistance to movement of air flowing along the surface of the earth or other surface such as an airplane wing.

The total drag at the surface is a combination of skin drag due to viscosity, form drag due to pressure forces created as the wind hits roughness elements, and gravity wave drag in the case of statically stable air. In the atmosphere, surface friction is related to turbulent drag.
Compare friction velocity, drag coefficient, Reynolds stress.

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