The view factor is related to the etendue. == Hottel`s crossed string rule == The crossed string rule allows calculation of radiation transfer between opposite sides of a quadrilateral, and furthermore applies in some cases where there is partial obstruction between the objects. For a derivation and further details, see this article by G H Derric....
Found on
http://en.wikipedia.org/wiki/View_factor
The fraction of the total energy emitted by one surface that is directly incident on another surface.
Found on
https://www.encyclo.co.uk/local/20687
No exact match found.
