Hydraulic Radius of a Partially Full Pipe (Less than Half Full) Formula |
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\( r_h \;=\; \dfrac{ A_c }{ P_w }\) \( A_c \;=\; r_h \cdot P_w \) \( P_w \;=\; \dfrac{ A_c }{ r_h }\) |
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| Symbol | English | Metric |
| \( r_h \) = hydraulic radius | \( in \) | \( mm \) |
| \( A_c \) = area cross-section of flow | \( in^2 \) | \( mm^2 \) |
| \( P_w \) = wetting perimeter | \(in \) | \( mm \) |
