Question: A thin rod of diameter D is initially in equilibrium with its surroundings, a large vacuum enclosure at temperature Tsur. Suddenly an electrical current I

A thin rod of diameter D is initially in equilibrium with its surroundings, a large vacuum enclosure at temperature Tsur. Suddenly an electrical current I (A) is passed through the rod having an electrical resistivity Pe and emissivity ε. Other pertinent thermo physical properties are identified in the sketch. Derive the transient, finite-difference equation for node m.

FAx--Ax- rE • m-1 Tm Pe P. C, k

FAx--Ax- rE m-1 Tm Pe P. C, k

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