5-11 - 296 Finite Element Analysis and Design 11. Find the...

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296 Finite Element Analysis and Design 11. Find the heat transfer per unit area through the composite wall in the figure. Assume one-dimensional heat flow and there is no heat flow between B and C. The thermal conductivities are k A = 0.04 W/m/ o C, k B = 0.1 W/m/ o C k C = 0.03 W/m/ o C, and k D = 0.06 W/m/ o C. Solution: From the assumption of one-dimensional heat flow, the problem can be modeled as a discrete system in the figure. Element A: (1) 11 2 2 0.16 0.16 0.16 0.16 Tq T q         Element B: (2) 22 (2) 3 3 0.06667 0.06667 0.06667 0.06667 T q     Element C: (3) (3) 3 3 0.02 0.02 0.02 0.02 T q     Element D: (4) 33 (4) 4 4 0.12 0.12 0.12 0.12 T q    
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This note was uploaded on 08/22/2011 for the course EML 4500 taught by Professor Staff during the Fall '08 term at University of Florida.

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5-11 - 296 Finite Element Analysis and Design 11. Find the...

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