File:NikRough residual vs R*.svg
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Original file (SVG file, nominally 481 × 491 pixels, file size: 624 KB)
Summary
A plot of resistance factor fD with the smooth pipe dependency factored out, versus R*, the friction Reynolds number. The smooth pipe data correspond to R* = 0, so are out of frame. The rough pipe data fall on a single trajectory when plotted in this way. For a given roughness ratio, e/D, and for R* large, the Darcy friction factor fD approaches a constant, independent of Re, the Reynolds number. Phenomenological functions attempting to fit these data, including the Colebrook–White relation are shown.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:13, 9 January 2017 | | 481 × 491 (624 KB) | 127.0.0.1 (talk) | A plot of resistance factor fD with the smooth pipe dependency factored out, versus R*, the friction Reynolds number. The smooth pipe data correspond to R* = 0, so are out of frame. The rough pipe data fall on a single trajectory when plotted in this way. For a given roughness ratio, e/D, and for R* large, the Darcy friction factor fD approaches a constant, independent of Re, the Reynolds number. Phenomenological functions attempting to fit these data, including the Colebrook–White relation are shown. |
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