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**jens****Member**- Registered: 2016-07-19
- Posts: 2

Hello, is it possible to apply nonlinear boundary conditions as a function of temperature and time?

lambda(T) dT/dn = f (T, t)

In particular, I need the following boundary condition:

h (T) * (Text (t) -T)

with:

h(T):= heat transfer coefficient (temperature dependent)

Text(t):= external Temperature (time dependent)

Best wishes

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**stephaneberger****Member**- From: Strasbourg (France)
- Registered: 2012-10-15
- Posts: 70

Hi,

Unfortunately, it's not possible to do what you want with code_aster.

What possible is :

- use h(t)x(T(t)-Tinf) where t is time and T is temperature.

- use non linear heat flow (FLUX_NL), where the flow F is function of Temperature and expressed in W/m² (depending of your unit system)

regards

Stephane

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