Mathematical model of Heat Transfer Coefficient through the annulus gap between concentric pipes filled with fluid:
(1) | U = \frac{\lambda}{d_h} \, {\rm Nu}_h |
where
\lambda | thermal conductivity of flowing fluid |
d_h | annular hydraulic diameter |
{\rm Nu}_h | dimensionless Nusselt number (Nu) |
The Nusselt number (Nu) correlations are:
Stagnant fluid | Natural Convection | Forced Convection | ||||||
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OEIS sequence A282581 | McAdams | |||||||
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\displaystyle c = \frac{0.03 \, a^{1.86}}{0.063 \, a^3 -0.674 \, a^2 +2.225 \, a - 1.157 } p = 1.013 \cdot\exp \left[ -0.067 \cdot a \right] |
See also
Physics / Thermodynamics / Heat Transfer / Heat Transfer Coefficient (HTC) / Heat Transfer Coefficient (HTC) @model
[ Thermal conductivity ] [ Nusselt number (Nu) ]