Hello Mateus,
Academic licenses do have size limitations, depending on which product being used. I see you have the Academic Teaching Introductory license, I'm assuming from ANSYS Student. These are the limits for ANSYS Student, as noted here: https://www.ansys.com/academic/free-student-products
Structural Physics: 32K nodes/elements
Fluid physics: 512K cells/nodes
Electromagnetics: N/A
Thank you,
Matt
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