me315_e2_sp2013_sol

6 m 2 s t 500 k 300 k exp 0009524 2 800

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Unformatted text preview: (a) 2 h Lc h ( r0 / 3) (100 W / m ! K ) " ( 0.1 m / 3) Bi = = = = 0.009524 << 0.1 ksolid ksolid 350 W / m ! K The lump capacitance model is VALID. $ ( +& ! T ! T" $! ( Bi) # ( Fo)& = exp .! ( Bi) # * " t -/ = = exp % ' 2 ! i Ti ! T" ) Lc ,' % $ 2.5 0 10 !6 m 2 / s ) # t & ( 500 K ! 300 K / = exp .! ( 0.009524) # 2 800 K ! 300 K (0.1 m / 3) . / % ' ! t = 42, 759.4 s (b) 2 h Lc h ( r0 /...
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