[qkhanh189]

Hello everybody,

I am simulating the process of water absorption of polymers in water. Polymer was soaked in water for 1 month, 3 months and 6 months, then polymer was removed to observe their water permeability phenomenon. Water is a stationary mass, without applied pressure, at a temperature of 65 ° C. I am researching UDF code, but it is difficult for a beginner and I don't know much about the C programming language. I have read the UDF tutorials and need DEFINE_DIFFUSION but I have no idea what the code is.

If anyone has any ideas for UDF code, I'd appreciate it.