There is a cap on the complexity of the mesh you can create (typically around 128k nodes/elements for structural and 512k cells for fluids). This is plenty for most university projects but prevents it from being used for massive commercial simulations.
Tools like Ansys Zemax OpticStudio, Ansys Discovery, and Ansys SPEOS. Limitations of the Free Student Version ansys educational version
Once downloaded, right-click the setup file and "Run as Administrator." There is a cap on the complexity of
High-performance licenses intended for graduate research, doctoral projects, and non-proprietary academic publishing. Key Features and Included Software Limitations of the Free Student Version Once downloaded,
To distinguish it from commercial and research products, the student version has several "caps" on simulation complexity: Ansys Student Versions | Free Student Software Downloads
The Ansys academic portfolio is divided into several tiers based on the user's role and needs: