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Hydraulic Radius Equation:
Where:
\( R_h \) = Hydraulic radius (m)
\( A \) = Cross-sectional area (m²)
\( P \) = Wetted perimeter (m)
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The hydraulic radius (Rh) is a measure of channel flow efficiency, defined as the ratio of the cross-sectional area of flow to the wetted perimeter. For truck channel applications, it helps in analyzing fluid flow characteristics.
The calculator uses the hydraulic radius equation:
Where:
Explanation: The equation shows that flow efficiency increases with larger cross-sectional area and decreases with larger wetted perimeter.
Details: Hydraulic radius is crucial in determining flow resistance, velocity, and discharge in open channels. It's particularly important in truck channel design for efficient fluid transport.
Tips: Enter the cross-sectional area in m² and wetted perimeter in m. Both values must be positive numbers. The calculator will compute the hydraulic radius in meters.
Q1: What's the difference between hydraulic radius and hydraulic diameter?
A: Hydraulic diameter is four times the hydraulic radius (Dh = 4Rh). Hydraulic radius is more commonly used in open channel flow calculations.
Q2: How does hydraulic radius affect flow efficiency?
A: Larger hydraulic radius generally indicates more efficient flow, as there's less perimeter creating friction relative to the flow area.
Q3: What are typical hydraulic radius values for truck channels?
A: Values vary by design, but typically range from 0.1 m to 0.5 m depending on channel size and shape.
Q4: Can this be used for partially full pipes?
A: Yes, the hydraulic radius concept applies to any flow cross-section, including partially full pipes or irregular channels.
Q5: How accurate is this calculation?
A: The calculation is mathematically exact, but practical accuracy depends on precise measurement of area and wetted perimeter.