Radiation View Factors: enclosure
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 | reciprocity F21 | surface 1 | surface 2 | view factor F12 |
|---|---|---|---|---|---|---|---|---|
| enclosure | equilateral_triangle_enclosure | 3-surface enclosure: F11+F12+F13=1; F11=0 (flat); by symmetry F12=F13=0.5. Equivalently: 3-surface rule for three equal flat surfaces. F21=F12=0.5 when areas are equal. | F12=0.5 by symmetry; F_ii=0 for all flat surfaces | Three-surface equilateral triangular enclosure; all three surfaces are flat and equal area; by symmetry F12=F13=F23=0.5 | 0.5 | Surface 1 (one wall) | Surface 2 (adjacent wall) | 0.5 |
| enclosure | hemisphere_to_base_disk | A2 (base disk) is flat so F21=1. Reciprocity: A1*F12=A2*F21 → 2piR^2*F12=piR^2*1 → F12=0.5. F11=1-F12=0.5 (hemisphere self-view). | F12=0.5; F21=1 | Hemispherical surface (area=2piR^2) to its flat circular base disk (area=piR^2) | 1 | Hemispherical surface | Base disk | 0.5 |
This is a sample. Search the full radiation view factors dataset and 300+ more by creating a free account and accessing the database.
Get started for FREE