**Thermal dimensionless properties of water and aluminium coating in a thermal network**

Hello,

I am in the process of creating a 3D steady-state thermal network for an aluminium-coated microchannel through which water flows. I am utilizing the Conjugate Heat Transfer example from Nvidia Modulus to build the network, as it appears to be well-suited for my application.

My questions pertain to the (dimensionless or not) values that need to be set in the AdvectionDiffusion, Diffusion, and DiffusionInterface functions. Specifically, I am referring to the terms for Diffusivity and Conductivity. In the Conjugate Heat Transfer example model, how are these values determined?

Thanks in advance!