Radiation View Factors: concentric_spheres
Radiation view factors (F12) for common geometric configurations — parallel plates, perpendicular surfaces, concentric cylinders/spheres, coaxial disks, enclosures
| geometry class | geometry id | configuration notes | formula expression | geometry description | param 1 name | param 1 value | reciprocity F21 | surface 1 | surface 2 | view factor F12 |
|---|---|---|---|---|---|---|---|---|---|---|
| concentric_spheres | concentric_spheres_r0p25 | Inner sphere convex: F12=1. Reciprocity: 4pi*r1^2*1=4pi*r2^2*F21 → F21=(r1/r2)^2=0.0625. F22=1-F21=0.9375. | F12=1; F21=(r1/r2)^2 | Two concentric spheres; inner radius r1 outer radius r2; r1/r2=0.25 | r1_over_r2 | 0.25 | 0.0625 | Inner sphere surface (radius r1) | Outer sphere surface (radius r2) | 1 |
| concentric_spheres | concentric_spheres_r0p5 | F12=1; F21=0.25; F22=0.75. | F12=1; F21=(r1/r2)^2 | Two concentric spheres; r1/r2=0.50 | r1_over_r2 | 0.5 | 0.25 | Inner sphere surface (radius r1) | Outer sphere surface (radius r2) | 1 |
| concentric_spheres | concentric_spheres_r0p75 | F12=1; F21=0.5625; F22=0.4375. | F12=1; F21=(r1/r2)^2 | Two concentric spheres; r1/r2=0.75 | r1_over_r2 | 0.75 | 0.5625 | Inner sphere surface (radius r1) | Outer sphere surface (radius r2) | 1 |
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