Chapter 12 Radiation Heat Transfer12-10 A semispherical furnace is considered. The view factor from the dome of this furnace to its flat base is to be determined. AssumptionsThe surfaces are diffuse emitters and reflectors.(1) (2) DAnalysisWe number the surfaces as follows: (1): circular base surface (2): dome surface Surface (1) is flat, and thus F110=. 11:ruleSummation 121211=→=+FFF0.5=====⎯→⎯=2124)1(A:ruley reciprocit2221122121212121DDAAFAAFFAFπ12-11 Two view factors associated with three very long ducts with different geometries are to be determined. Assumptions1The surfaces are diffuse emitters and reflectors. 2End effects are neglected.Analysis(a) Surface (1) is flat, and thus F110=. 1=→=+1212111:rulesummation FFF0.64==⎟⎠⎞⎜⎝⎛==⎯=2)1(2A:rule
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This note was uploaded on 01/24/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.