Kept on Wikipedia:External flow
In fluid mechanics, external flow is a flow that boundary layers develop freely, without constraints imposed by adjacent surfaces.[1][2] It can be defined as the flow of a fluid around a body that is completely submerged in it. Examples include 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, water flowing around submarines, and air flowing around a truck;[3] a 2000 paper analyzing the latter used computational fluid dynamics to model the three-dimensional flow structure and pressure distribution on the external surface of the truck.[3] In a 2008 paper, external flow was said to be "arguably is the most common and best studied case in soft matter systems.[4]
The term can also be used simply to describe flow in any body of fluid external to the system under consideration.[5][6]
In external co-flow, fluid in the external region occurs in the same direction as flow within the system of interest; this contrasts with external counterflow.[1]
References
- ↑ 1.0 1.1 Jendoubi, S.; Strykowski, P. J. (September 1, 1994). "Absolute and convective instability of axisymmetric jets with external flow". Physics of Fluids. 6 (9): 3000–3009. doi:10.1063/1.868126 – via aip.scitation.org (Atypon).
- ↑ Lebedev, V. V.; Turitsyn, K. S.; Vergeles, S. S. (November 20, 2007). "Dynamics of nearly spherical vesicles in an external flow". Physical Review Letters. 99 (21): 218101. doi:10.1103/PhysRevLett.99.218101 – via arXiv.org.
- ↑ 3.0 3.1 Roy, Subrata; Srinivasan, Pradeep (2000). "External Flow Analysis of a Truck for Drag Reduction". SAE Transactions. 109: 808–812 – via JSTOR.
- ↑ Speck, Thomas; Mehl, Jakob; Seifert, Udo (April 28, 2008). "Role of External Flow and Frame Invariance in Stochastic Thermodynamics". Physical Review Letters. 100 (17): 178302. doi:10.1103/PhysRevLett.100.178302 – via APS.
- ↑ "External flow effects on the discharge coefficients of two types of ventilation opening". Journal of Wind Engineering and Industrial Aerodynamics. 95 (4): 225–252. April 1, 2007. doi:10.1016/j.jweia.2006.06.013 – via www.sciencedirect.com.
- ↑ Chew, J. W.; Green, T.; Turner, A. B. (February 18, 2015). "Rim Sealing of Rotor-Stator Wheelspaces in the Presence of External Flow". American Society of Mechanical Engineers Digital Collection. doi:10.1115/94-GT-126 – via asmedigitalcollection.asme.org.
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