errow in setting thermal-conductivity coupled temperature

[DYLDYLDYL]

hi,
I want to set thermal-conductivity coupled temperature.

[Materials]
  [thermal]
    type = HeatConductionMaterial
    temp = T
    thermal_conductivity_temperature_function = 0.1*T
  []
[]

It shows: The following error occurred in the object "MOOSE Problem", of type "FEProblem".Unable to find function 0.1*T
When I set a parsed function K in [functin], and then thermal_conductivity_temperature_function = k, it will run.
But parsed function can only couple xyzt.

Thanks in advance for your help!

[GiudGiud]

Hello

0.1 * T is not a "Function" in MOOSE because it depends on a variable, and it's not in the format MOOSE expects for two reasons:

• In general only the ParsedXXX objects will accept this sort of syntax (except with constants, constant parsing is widely supported)

• This parameter likely expects a 1D function that maps temperature to thermal conductivity. You can easily reproduce 0.1 T with a real Function by specifying a PiecewiseLinear function for example.

Note: this parameter abuses Functions in that it takes 'x' to be temperature. So instead of having a spatial dependence, they have a temperature dependence. The ParsedFunction you could pass here would be: 0.1 * x

Guillaume

[DYLDYLDYL]

Thanks!

[liao225]

Hello, excuse me, may I ask if it is correct to use this method?

[GiudGiud]

this looks fine to me for a theoretical material

[GiudGiud]

actually, no, probably should be 0.1 * t

[liao225]

Thanks!