Bejan Number - Heat Transfer
Bejan number - heat transfer, abbreviated as Be, a dimensionless number, is the pressure drop along a channel of length.
Bejan Number - Heat Transfer formula |
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\( Be = \Delta p \; l^2 \;/\; \mu \; \alpha \) (Bejan Number - Heat Transfer) \( \Delta p = Be \; l^2 \;/\; \mu \; \alpha \) \( l = \sqrt{ Be \; \mu \; \alpha \;/\; \Delta p } \) \( \mu = \Delta p \; l^2 \;/\; Be \; \alpha \) \( \alpha = \Delta p \; l^2 \;/\; Be \; \mu \) |
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Symbol | English | Metric |
\( Be \) = Bejan number | \(dimensionless\) | |
\( \Delta p \) = pressure drop | \(lbf\;/\;in^2\) | \(Pa\) |
\( l \) = length of channel | \(ft\) | \(m\) |
\( \mu \) (Greek symbol mu) = dynamic viscosity | \(lbf-sec\;/\;ft^2\) | \( Pa-s \) |
\( \alpha \) (Greek symbol alpha) = thermal diffusivity | \(ft^2\;/\;sec\) | \(m^2\;/\;s\) |