File:Drag coefficient on a sphere vs. Reynolds number - main trends.svg

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摘要

描述	English: Drag coefficient C_d for a sphere as a function of Reynolds number Re, as obtained from laboratory experiments. The dark line is for a sphere with a smooth surface, while the lighter-colored line is for the case of a rough surface. The numbers along the line indicate several flow regimes and associated changes in the drag coefficient: 2: attached flow (Stokes flow) and steady separated flow, 3: separated unsteady flow, having a laminar boundary layer upstream of the separation, and producing a vortex street, 4: separated unsteady flow with a laminar boundary layer at upstream side, before flow separation, with downstream of the sphere a chaotic turbulent wake, 5: super-critical separated flow, with a turbulent boundary layer.
日期	在2010年之前 date QS:P,+2010-00-00T00:00:00Z/7,P1326,+2010-00-00T00:00:00Z/9 (original), 2016 (modifications)
来源	Original on NASA GRC Website imported as File:Dragsphere nasa.jpg Vectorized version at File:Drag sphere nasa.svg, further edited here with source data from File:CX SPHERE.png
作者	Original: Anonymous NASA author (editor: Nancy Hall) Vectorization by User:Kraaiennest Edits by Olivier Cleynen
其他版本	[编辑] .svg: 英语 .svg 英语 .svg 英语 .svg 罗马尼亚语 .svg 俄语 .svg .png: 英语 .png 法语 .png 法语 .png 法语 .png .jpg: 英语 .jpg