Mathematical model of Heat Transfer Coefficient through the annulus gap between concentric pipes filled with solid body:
| (1) | U = \frac{\lambda}{r_{in} \cdot \ln (r_{out}/r_{in})} |
where
\lambda | thermal conductivity of the solid body |
r_{out} | inner radius of outer pipe |
r_{in} | outer radius of inner pipe |
For the thin walls
h \ll r_{in} the
(1) equation simplifies to:
| (2) | U = \frac{\lambda}{h} |
where
h= r_{out}-r_{in} | wall thickness |
See also
Physics / Thermodynamics / Heat Transfer / Heat Transfer Coefficient (HTC) / Heat Transfer Coefficient (HTC) @model
[ Thermal conductivity ] [ Nusselt number (Nu) ]