Posted Mon, 22 May 2023 10:37:58 GMT by Tomás Coscia student
Hi everyone.

I'm trying to simulate evapotranspiration and I have a doubt. I'm applying using a math expression in in/outflow on top/bottom and it works, but I don't know why is evaporating from the whole model and not only my defined area to the in/outflow...

Any idea how it works? or how a I could deal with this problem?



Posted Tue, 23 May 2023 12:31:24 GMT by Carlos Andres Rivera Villarreyes Global Product Specialist - FEFLOW
Hi Tomás,
With your explanation, it looks to me that the expression does not spatially constraint the operation. A mathematical expression is applied to the FEFLOW's parameter and to all the mesh elements (automatically). So, you need to reformulate the express, eg. to apply the In/Outflow on top/bottom only to specific areas. A tip: Expressions works also with Elemental User Distributions. You can use them for creating the constraints.
Please follow-up with our technical support at for details on the workflows.
Carlos Rivera
Posted Tue, 23 May 2023 15:42:48 GMT by Tomás Coscia student
Hi Carlos,

Thanks for answering and your tip! It was very useful!



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