Alcuni esempi tratti da:
Howell J.R., A catalog of Radiation Heat Transfer Configuration Factors,
University of Texas Austin, 2001 : http://www.me.utexas.edu/~howell/index.html
C-5a: Two infinitely long plates of unequal width without a common edge with an included angle

.
Reference: Kies
Governing equation:
1

C-11: Identical, parallel, directly opposed rectangles.
Reference: Hottel, 1931 ; Hamilton and Morgan ; Byun, 1999 , Narayana, 1998
Definitions: X = a/c Y=b/c
Governing equation:
2

C-12: Coaxial, parallel squares of different edge
length.
Reference: Crawford
Definitions: A = a/c; B = b/a; X = A(1 + B); Y = A(1-B)
Governing equation:
3

C-13: Rectangle to rectangle in a parallel plane.
Reference: Ehlert and Smith ; see also Gross, Spindler and Hahne ;
Byrd; Boeke and Wall ; Chekhovskii, et al.
; Hsu
Governing equation:
4

C-14: Two finite rectangles of same length, having one common edge, and at an angle of 90 o to each other.
Reference: Hottel, 1931 ; Hamilton and Morgan ; Byun, 1999 .
Definitions: H=h/l W=w/l
Governing equation:
5

Inner coaxial cylinder to outer coaxial cylinder; inner
cylinder extends beyond both ends of outer.
Reference: Rea ; Shukla and Ghosh
Definitions:
Governing Equation:
6

C-102: Perpendicular cylinders of equal radius and equal finite length, closest separation at
centers.
Reference: Ameri and Felske
Definitions:
C = c/r; L = l /r;
X = 2.42C - 2.24
Governing Equation:
7

C-121: Sphere to rectangle perpendicular to line
through sphere axis.
Reference: Feingold and Gupta
Definitions:
B
1
= b
1
/a
B
2
= b
2
/a
Governing Equation:
8

C-122: Sphere to rectangle r < d.
Reference: Tripp, Hwang, and Crank (For sphere to offset rectangle, see Sabet and Chung; also see Tseng and Strieder)
Definitions:
D
1
= d/ l
1
D
2
= d/ l
2
Governing Equation:
9

C-125: Sphere to coaxial disk.
Reference: Feingold and Gupta ; Naraghi and Chung (1981) ; (For noncoaxial ellipse, see Sabet and Chung .)
R = r/a
Definitions:
Governing Equation:
10

C-139: Sphere to coaxial cone.
Reference: Chung and Naraghi (1980) ; Campbell and McConnell ;
Kobyshev, et al.
Definitions:
R = r
2
/r
1
S = s/r
1
Governing Equation:
11

C-131: Sphere to interior surface of coaxial right circular cylinder; sphere outside end of cylinder, and sphere radius less than cylinder radius (r
1
< r
2
).
Reference: Feingold and Gupta
Definitions:
R
1
= r
2
/a
1
R
2
= r
2
/a
2
Governing Equation:
12

C-142: Sphere to coaxial ellipsoid.
Reference: Chung and Naraghi (1980)
Definitions:
S = s/r; A = a/r
B = b/r
Graphical Results:
13

C-146: Any finite area of any shape on interior of
hemisphere to entire base.
Reference: Buschman and Pittman
Governing Equation:
14

C-150: Section of interior of hemisphere to disk
on base.
Reference: Buschman and Pittman
R = r/a
L = l /a
Definitions:
Governing Equation:
15

C-126: Sphere to noncoaxial disk; plane of disk does not intersect sphere. Point o may lie inside or
outside disk.
Reference: Feingold and Gupta : (For sphere to noncoaxial ellipse, see
Sabet and Chung .)
Z = b/r
R = r/a
Definitions:
Graphical Results:
16

162: Standing pig to various rectangles.
Reference: Minowa
(See reference for many different pig-rectangle orientations)
17

C-157: Seated standard person to side vertical
rectangle.
Reference: Dunkle
Definitions:
X = x/y
Y = z/y
A = (1+X
2
+Y
2
)
1/2
Governing Equations:
18

C-156: Seated standard person facing vertical
panel.
Reference: Dunkle
Definitions:
Y = y/x; B = (1+Y
2
)
1/2
Z = z/x; C = (1+Z
2
)
1/2
A = (1+Y
2
+Z
2
)
1/2
Governing Equations:
19