Dean Number
Dean number, abbreviated as De, a dimensionless number, used in momentum transfer for the flow in curved pipes and channels. The equation and calculation is shown below.
Dean Number formula |
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\(\large{ De = \sqrt { \frac {d}{2 \; r} } \; \frac {\rho \; v \; d}{ \mu } = \sqrt { \frac { d } { 2 \; r } } \; Re }\) | ||
Symbol | English | Metric |
\(\large{ De }\) = Dean number | \(\large{dimensionless}\) | |
\(\large{ \rho }\) (Greek symbol rho) = density of fluid | \(\large{\frac{lbm}{ft^3}}\) | \(\large{\frac{kg}{m^3}}\) |
\(\large{ d }\) = diameter | \(\large{in}\) | \(\large{mm}\) |
\(\large{ \mu }\) (Greek symbol mu) = dynamic viscosity | \(\large{\frac{lbf-sec}{ft^2}}\) | \(\large{ Pa-s }\) |
\(\large{ r }\) = radius of curviture of the path of channel | \(\large{in}\) | \(\large{mm}\) |
\(\large{ Re }\) = Reynolds number | \(\large{dimensionless}\) | |
\(\large{ v }\) = axial velocity scale | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) |
Dean number calculator
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