Irreversible thermalinjury may occur in any living tissue that is maintained atT

Question

Irreversible thermalinjury may occur in any living tissue that is maintained atT>48oC for a duration of t >10 s. Ifa person’s skin initially at 35oC comes into contact with ahot copper surface at 100oC.

(a) Determine the time it will take to cause irreversible thermalinjury at a skin ( = 980 kg/m3, k = 0.37 W/m-K, Cp = 4000J/kg-K) depth of 0.5, 1, and 2 mm.

(b) Determine an equation in terms of T(x,t), as a function oftime, and plot for x = 0.5, 1, and 2 mm.

(c) Plot q”(t) using W/m2 and Q”(t) using J/cm2 as afunction of time (0-30 sec). Irreversible thermalinjury may occur in any living tissue that is maintained atT>48oC for a duration of t >10 s. Ifa person’s skin initially at 35oC comes into contact with ahot copper surface at 100oC.

(a) Determine the time it will take to cause irreversible thermalinjury at a skin ( = 980 kg/m3, k = 0.37 W/m-K, Cp = 4000J/kg-K) depth of 0.5, 1, and 2 mm.

(b) Determine an equation in terms of T(x,t), as a function oftime, and plot for x = 0.5, 1, and 2 mm.

(c) Plot q”(t) using W/m2 and Q”(t) using J/cm2 as afunction of time (0-30 sec).

Explanation / Answer

Does anybody have hints for this?

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