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Probleme with integration results

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Hi,

I'm using Comsol 5.2 for fluid mechanic. I designed my tank in 2D and i need to know to nominal residence time of the liquid inside. In order to do that, I put a tracer coming from the inlet and going to the outlet. This point works put when i try to visualize the tracer concentration at the outlet, Comsol says that the concentration doesn't depend of time.
It may come from the definition of the tracer I did : I used a rectangular function as input but then Comsol says that my concentration doesn't have the right unit. You must know I started Comsol 2 weeks ago and I continue someone else's work. If you need any more information don't hesitate, I'll try to explain the best I can what's my situation so you can help me.
Thank you for your time.

0 Replies Last Post 28 nov. 2016, 08:33 UTC−5
COMSOL Moderator

Hello Thomas Gagnebien

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