Cableizer ®

Radiation shape factor touching cables

Symbol
$\zeta_{er}$
Formulas
$\left(2-\frac{2\pi-4}{4\pi}\right) \epsilon_{e}$2 cables
$\frac{3}{1-\frac{6\pi A_{e} \epsilon_{e} \eta_{di}}{\epsilon_{di} A_{di}}}$3 cables, Anders1997
$\frac{3}{1-6\pi \eta_{e}}$3 cables, Anders1995
$\frac{N_{c} D_{o}}{D_{di}} \frac{1}{1-\frac{\pi N_{c} D_{o}}{D_{di}} \frac{\epsilon_{e}}{\epsilon_{di}} \left(N_{c}-1\right) \left(1-\epsilon_{di}\right)}$n cables, Weely1998
Related
$A_{di}$
Duct surface (inner) [m$^2$]
$A_{e}$
Surface of object [m$^2$]
$D_{di}$
Inner diameter duct [m]
$D_{o}$
Outer diameter [m]
$\epsilon_{di}$
Emissivity duct surface (inner)
$\epsilon_{e}$
Emissivity cable
$\eta_{di}$
Reflectivity duct surface (outer)
$\eta_{e}$
Reflectivity cable
$N_{c}$
Number of sources in system
$\pi$
Archimedes' constant $\pi$
Used in
$K_{r}$
Radiation shape factor