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

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Summary

Description
English: Drag coefficient Cd 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.
Date before 2010
date QS:P,+2010-00-00T00:00:00Z/7,P1326,+2010-00-00T00:00:00Z/9
(original), 2016 (modifications)
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Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
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Date/TimeThumbnailDimensionsUserComment
current17:52, 3 October 2016Thumbnail for version as of 17:52, 3 October 2016655 × 341 (18 KB)AriadacapoReduce font size for axis labels
17:31, 28 September 2016Thumbnail for version as of 17:31, 28 September 2016682 × 359 (18 KB)AriadacapoTidy up: font sizes and labels
17:30, 28 September 2016Thumbnail for version as of 17:30, 28 September 2016682 × 359 (16 KB)AriadacapoRe-arrange numbers on axis, adjust curves so they match values on File:CX_SPHERE.png
17:29, 28 September 2016Thumbnail for version as of 17:29, 28 September 2016682 × 396 (17 KB)AriadacapoUse colors from the Viridis colorscale for accessibility, dashes can be avoided
17:29, 28 September 2016Thumbnail for version as of 17:29, 28 September 2016682 × 396 (17 KB)AriadacapoTidy up: text in serif, identical data range on two curves, better use of space
17:28, 28 September 2016Thumbnail for version as of 17:28, 28 September 2016637 × 430 (16 KB)AriadacapoBasic cleanup: exponents in x-axis, text alignment, uniform font sizes, vacuum defs
17:27, 28 September 2016Thumbnail for version as of 17:27, 28 September 2016673 × 451 (20 KB)AriadacapoUser created page with UploadWizard
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