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How to define the divergence of a vector

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Hello there,

Is there a way to define the divergence of a vector as a function or inside a boundary condition?

Basically, I'm trying to use the divergence of the velocity field from the "Laminar Flow" physics in an expression for the "Reaction" boundary condition for the "Transport of Diluted Species" Physics. Any help is appreciated!


0 Replies Last Post 28 apr 2023, 03:52 GMT-4
COMSOL Moderator

Hello Mohammed

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