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Ansys Learning Forum › Forums › Discuss Simulation › Electronics › Basic Thermoelectric Simulation › Reply To: Basic Thermoelectric Simulation

March 7, 2019 at 2:32 pm
jj77
Subscriber

Simple test here. 0.5 m long steel wire with 1E-3 V on one and 0 V on the opposite face end. With tiny convection BC on all 3 faces of 1E-4 and bulk temp of 22 for the conv.


 


Voltage is 1E-3 on one end and 0 on other.


Dir. electric file int. Ez = -dV/dz = .001V/0.5 m = -.002 V/m, that is what ansys gives.


Dir current density: Jz=sigmaz*Ez = 1/(1.7E-7)*-.002= -1.1765E4 A/m2, that is what ansys gives


Joule heating = Jz^2*resistivity = (-1.1765E4)^2*1.7E-7 = 23.53 W/m2, that is what ansys gives.


Temp. rise is from 22 ambient to 314, that is correct answer (just add the internal heat on a pure steady state heat transfer run, and one gets same)



 


 


 


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