Hệ số khuếch tán (Diffusivity)
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Cập nhật: 28/08/2026 20:31
A property describing how fast a species diffuses in a medium.
Diffusivity depends on the diffusing species, medium, temperature, pressure, and molecular interactions. Larger diffusivity usually means faster mass transfer, while low diffusivity is common in liquids, polymers, solids, and viscous systems.