Simulating conduction transfers at two different sides?

[lorysalda]

Hi everyone,

I am studying the heat transfers occurring on a container wall composed of two layers: one of steel and the other of insulating material. I would like to model these exchanges in a simplified way, and in particular, for a given layer, I would like to simulate a conductive transfer on both sides (one in contact with the surrounding air and the other with the other wall layer).
I used the following code strategy (attached to this post), so far I have not found a solution to simulate a conductive exchange at x == 0 and another at x == 0.4.
I would like to try to add a term to Subscript[[CapitalGamma], conductive] but for the moment I have not found any solutions on the internet or in the documentation.

Could you help me please?

Thanks for your time,
Regards,
Lorys

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