This example models resistive Joule heating where the resulting current from an
applied electric potential will heat a thin spiral shaped Tungsten wire, such as
can be found in incandescent light bulbs. The filament reaches an equilibrium
temperature where the internal heat generation is balanced by radiative heat
loss through the boundaries.
Two physics modes are involved, conductive media DC for the electric
potential V, and heat transfer for the temperature T. Since the
coupling is one way where only the heat transfer source term depends
on the potential, the model will be solved in two steps. First for the
electric potential, and then for the temperature using the
pre-calculated potential, this saves computational time.
This model is available as an automated tutorial by selecting Model
Examples and Tutorials… > Multiphysics > Resistive Heating
in a Tungsten Filament from the File menu. Or alternatively,
follow the linked step-by-step instructions.