Ansys provides free student versions for learning purposes, but these packages limit the size of the physics problems you can solve. Limited to 128,000 nodes or elements.
Ansys Academic and Student versions have built-in constraints to ensure the software is used for educational purposes rather than heavy industrial work. Ansys Student (Introductory): Typically limited to 32,000 nodes/elements for Structural (Mechanical) simulations and 512,000 cells/nodes for Fluid Dynamics (Fluent). Newer versions may allow up to for structural or nearly for CFD, but these vary by release. University Licenses: Limits vary by tier, such as for Intermediate, for Advanced, and for Research licenses.
If your model is symmetric (e.g., a cylinder, a bridge, or a pipe), cut it in half or quarters. Apply symmetry boundary conditions. This instantly reduces your problem size by 50% to 75%.
Or for Mechanical:
In short: Your current license restricts how large a simulation you can run, and ANSYS has just confirmed that your current model is either at or approaching that boundary.
If you once exceeded the limit and then reduced your mesh, Ansys sometimes "remembers" the failure. A common workaround is to Update Geometry from Source
Why You Exceeded the Limit (Even When the Mesh Looked Small) Ansys provides free student versions for learning purposes,
– solve subcomponents separately.
Proactive engineering is better than reactive debugging.
If you exceed the licensed limit, ANSYS typically: If your model is symmetric (e
Limits can vary from 16k to 512k nodes depending on whether the license is "Introductory," "Intermediate," or "Research". Why It Might Fail Even If Your Count Is Low
If you see "Your product license has numerical problem size limits" :
In the context of Ansys simulation software, a "numerical problem size" refers to the , most directly measured in the number of nodes and elements that constitute its mesh. To ensure responsible use and cater to different customer bases, Ansys deliberately restricts the maximum allowable problem size for certain license types. Refine the Mesh Strategically
If you are using the version, you must reduce the complexity of your model to fit within the node limits. A. Refine the Mesh Strategically