HY8:Increased Resistance in Circular Culverts: Difference between revisions
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The input variables required for this calculation is the following: | The input variables required for this calculation is the following: | ||
* L/D<sub>i</sub> | * L/D<sub>i</sub> — Ratio of roughness element spacing divided by the diameter of the culvert opening at the roughness element. (Range = .05 to 1.5) | ||
* h/D<sub>i</sub> | * h/D<sub>i</sub> — Ratio of roughness element height divided by the diameter of the culvert opening at the roughness element. (Range = .005 to .1). | ||
* L<sub>r</sub>/P<sub>i</sub> | * L<sub>r</sub>/P<sub>i</sub> — Ratio of the roughness length to inside perimeter (Range = 0.0 to 1.0) | ||
* Diameter of roughened section (Opening, D<sub>i</sub>) | * Diameter of roughened section (Opening, D<sub>i</sub>) | ||
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Variables from the figure | Variables from the figure | ||
* L | * L — Length from beginning of one roughness element to the beginning of the next roughness element. | ||
* h | * h — height of roughness element | ||
* D<sub>i</sub> | * D<sub>i</sub> — diameter of roughened section (opening) | ||
{{HY8Main}} | {{HY8Main}} | ||
Revision as of 00:10, 10 January 2013
The input variables required for this calculation is the following:
- L/Di — Ratio of roughness element spacing divided by the diameter of the culvert opening at the roughness element. (Range = .05 to 1.5)
- h/Di — Ratio of roughness element height divided by the diameter of the culvert opening at the roughness element. (Range = .005 to .1).
- Lr/Pi — Ratio of the roughness length to inside perimeter (Range = 0.0 to 1.0)
- Diameter of roughened section (Opening, Di)
The following figure shows the flow regimes and variables for an increased resistance energy dissipator implemented in a circular culvert.
Variables from the figure
- L — Length from beginning of one roughness element to the beginning of the next roughness element.
- h — height of roughness element
- Di — diameter of roughened section (opening)
