...
| LaTeX Math Inline |
|---|
| body | --uriencoded--f_%7BCW%7D(\mbox%7BRe%7D, \epsilon) |
|---|
|
| Colebrook–White correlation |
| LaTeX Math Inline |
|---|
| body | --uriencoded--\displaystyle k = \frac%7B f_%7BCW%7D( \mbox%7BRe%7D =4,000, \, \epsilon) -0.03048%7D%7B1,900%7D |
|---|
|
| interpolation multiplier between laminar and turbulent flow regimes |
...
| LaTeX Math Block |
|---|
| f = \frac{64}{\rm Re} \cdot \Phi |
| | LaTeX Math Block |
|---|
| \Phi = \left( \frac{{\rm Re}}{64} \right)^{1-a}
\cdot \left( 0.75 \cdot \ln \frac{{\rm Re}}{5.37} \right)^{-2 \,(1-a)\,b}
\cdot \left( 0.83 \cdot \ln \frac{3.41}{\epsilon/d} \right)^{-2 \,(1-a)\,(1-b)} |
|
| LaTeX Math Block |
|---|
| a = \left[ 1+ \left( \frac{{\rm Re}}{2712} \right)^{8.4} \right]^{-1} |
| | LaTeX Math Block |
|---|
| b = \left[ 1+ \left( \frac{{\rm Re} \cdot \epsilon/d}{150} \right)^{1.8} \right]^{-1} |
|
...
Physics / Fluid Dynamics / Pipe Flow Dynamics / Darcy–Weisbach equation / Darcy friction factor
[ Surface roughness ] [ Reduced Friction Factor (Φ) ]
Reference
...
Moody’s Friction Factor Calculator @ gmallya.com
...
