14. adv-joule-heating(4)

Ansys icepro 教程+例子

Joule Heating Resistivity of a metallic conductor generally increases p with an increase in temperature The temperature dependence can be expressed as:

ρ=ρref (1+α(T Tref ))where,ρ= resistivity at operating temperature, T, (Ohm-m) y p g p,,( )ρref= resistivity at a reference temperature, Tref, (Ohm-m)α= temperature coefficient of the metal, (1/oC)– For copper at 20 C: Resistivity,ρ= 1.7e-8 Ohm-m Temperature coefficient,α= 4.3e-3 per C D t f more materials are given i th A Data for t i l i in the Appendix di

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