solid-solid interdiffusion

Rado · September 21, 2022, 05:19

Hello everyone,
my question concerns the possibility of calculating the interdiffusion (chemical diffusion) of at least two solids (Ni and Cu) at the interface at variable temperature.
The assumption is that we have bimetal (Cu and Ni) and we start to heat it. I am interested in calculating the phenomenon of interdiffusion of these elements.
I know that the theoretical foundations are based on Boltzmann's transformation of Fick's second law, but have no idea how to implement it.

Is it possible in CFX?

Would be grateful for any help.

Gert-Jan · September 21, 2022, 05:29

This is best described by the Maxwell-Stefan equations for Multicomponent diffusion. Ni into Cu and Cu into Ni. Look for the book of Taylor and Krishna.
This is not covered in CFX. Maybe you can modify CFX to have it done what you want, but better write your own code.

September 21, 2022, 05:19	solid-solid interdiffusion	#1
Rado New Member Radomir Join Date: Sep 2022 Posts: 1 Rep Power: 0	Hello everyone, my question concerns the possibility of calculating the interdiffusion (chemical diffusion) of at least two solids (Ni and Cu) at the interface at variable temperature. The assumption is that we have bimetal (Cu and Ni) and we start to heat it. I am interested in calculating the phenomenon of interdiffusion of these elements. I know that the theoretical foundations are based on Boltzmann's transformation of Fick's second law, but have no idea how to implement it. Is it possible in CFX? Would be grateful for any help.

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September 21, 2022, 05:29		#2
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,918 Rep Power: 28	This is best described by the Maxwell-Stefan equations for Multicomponent diffusion. Ni into Cu and Cu into Ni. Look for the book of Taylor and Krishna. This is not covered in CFX. Maybe you can modify CFX to have it done what you want, but better write your own code.