fem.ThermalProblem

fem.ThermalProblem(conductivity, source=0.0, dirichlet=(), neumann=())

Steady heat conduction: −∇·(k∇T) = q with conditions by selection.

conductivity is a number, a per-element (C,) field, or a traced scalar; dirichlet pairs a selection with a prescribed temperature (possibly traced), neumann a selection with an inflow per area.