Enter the areas of two surfaces and the distance between them into the calculator to determine the radiation view factor between the surfaces. This calculator assumes that one surface is much smaller than the other and that they are facing each other directly.
Radiation View Factor Formula
The following formula is used to calculate the radiation view factor between two surfaces.
F_{12} = frac{1}{pi} cdot frac{A_2}{d^2}Variables:
- F_{12} is the view factor from surface 1 to surface 2
- A_2 is the area of surface 2 (m²)
- d is the distance between the centers of the areas (m)
To calculate the radiation view factor, divide the area of the second surface by the square of the distance between the surfaces, and then divide by pi.
What is a Radiation View Factor?
The radiation view factor, also known as the configuration factor or shape factor, is a dimensionless quantity used in radiative heat transfer calculations. It represents the fraction of the radiation leaving one surface that directly reaches another surface. The view factor depends on the geometry of the surfaces and their relative orientation. It is a critical component in calculating radiative heat exchange between surfaces.
How to Calculate Radiation View Factor?
The following steps outline how to calculate the Radiation View Factor.
- First, determine the area of surface 2 (A_2) in square meters.
- Next, determine the distance between the centers of the areas (d) in meters.
- Next, gather the formula from above = F_{12} = (1 / π) * (A_2 / d^2).
- Finally, calculate the Radiation View Factor (F_{12}).
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Area of surface 2 (A_2) = 2 m²
Distance between the centers of the areas (d) = 1 m