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| View Original: | Drag coefficient on a sphere vs. Reynolds number - main trends.svg (634x319) | |||
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| Keywords: Drag coefficient on a sphere vs. Reynolds number - main trends.svg Drag coefficient C<sub>d</sub> 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 before 2010 original 2016 modifications Original on http //www grc nasa gov/WWW/k-12/airplane/dragsphere html 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 Original Anonymous NASA author editor Nancy Hall Vectorization by User Kraaiennest Edits by Olivier Cleynen other versions Drag fluid dynamics Reynolds number | ||||
