External flow: Difference between revisions

Revision as of 06:30, 15 April 2021

Revision as of 06:35, 15 April 2021

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{{unreferenced|date=January 2007}}

In [[fluid mechanics]], '''external flow''' is a flow that [[boundary layer]]s develop freely, without constraints imposed by adjacent surfaces.<ref name="AIP"/><ref name="dynamics"/> Accordingly, there will always exist a region of the flow outside the boundary layer in which velocity, temperature, and/or [[concentration gradient]]s are negligible. It can be defined as the flow of a fluid around a body that is completely submerged in it. AnExamples example includesinclude fluid motion over a flat plate (inclined or parallel to the free stream velocity) and flow over curved surfaces such as a sphere, cylinder, [[airfoil]], or [[turbine blade]], air flowing around an airplane, and water flowing around submarines. In a 2008 paper, external flow was said to be "arguably is the submarinesmost common and best studied case in [[soft matter systems]].<ref name="stochastic"/>

The term can also be used simply to describe flow in any body of fluid external to the system under consideration.<ref name="external"/><ref name="asme"/>

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<ref name="absolute">https://aip.scitation.org/doi/abs/10.1063/1.868126</ref>

<ref name="asme">https://asmedigitalcollection.asme.org/GT/proceedings/GT1994/78835/V001T01A041/255325</ref>

<ref name="stochastic">https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.100.178302</ref>

</references>