推 cokenis:暱稱有屌... 11/08 16:20
推 birdjuju:推一個暱稱 11/08 17:30
推 use:如果是考場弱者該怎麼辦 >"< 11/08 18:41
推 KKFC:謝謝助教 11/08 23:05
今天講解習題時有同學問到這個
如何推出Fo的物理意義?
我把推導過程寫在底下
Fo = α*t/L^2 = (k/ρCp)/L^2
= kt/ρCpL^2 = ktL/ρCpL^3
= kL/[ρCp(L^3)(1/t)] = [kL(ΔT)]/[ρCp(L^3)ΔT(1/t)]
= [k(L^2)(ΔT/L)]/[ρCp(L^3)ΔT(1/t)]
= [k*A*(ΔT/L)]/[ρ*Cp*V*ΔT/t]
= [k*A*(ΔT/L)]/[m*Cp*ΔT/t]
= (heat conduction rate)/(thermal energy storage rate)
= Ratio of the heat conduction rate to the rate of
thermal energy storage in a solid
戴怡德老師 單操二
助教 張孟淳
化工館127室
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