Your Product License Has Numerical Problem Size Limits Verified - Ansys

In the world of engineering and simulation, accuracy and reliability are paramount. ANSYS, a leading provider of engineering simulation software, offers a wide range of tools to help engineers and researchers analyze and optimize their designs. One crucial aspect of working with ANSYS is understanding the limitations of your product license, particularly when it comes to numerical problem size limits. In this blog post, we'll delve into the importance of verifying these limits and how to do it effectively.

If you are using a commercial license and still see this error, you may be using an outdated license file or a limited "Academic" package rather than the full "Enterprise" or "Pro" packages.

[CAD Geometry] ➔ [Mesh Generation] ➔ [License Validation] ➔ [Solver Blocked ❌] ▲ Exceeds Node/Cell Cap 1. Hard Boundaries of the Ansys Student License In the world of engineering and simulation, accuracy

| License Type | Max DOFs (Structural) | Max Cells (CFD) | HPC Cores | |-----------------------------|------------------------|------------------|------------| | ANSYS Academic Teaching | 512,000 | 1M cells | 4 | | ANSYS Academic Research | Unlimited (with HPC) | Unlimited | 64+ | | ANSYS Professional | 32,000 | N/A | 2 | | ANSYS Enterprise | Unlimited | Unlimited | 16 (base) | | ANSYS Mechanical Pro | 128,000 | N/A | 4 |

A forum user experienced this firsthand. They had a model with 110,000 elements and 90,000 nodes, well under a theoretical 128k limit, but applying hydrostatic pressure triggered the error. The root cause was the SURF154 surface effect elements created by the pressure load, which pushed the total count over the edge. In this blog post, we'll delve into the

When encountering the problem size limit error, the primary approach is to reduce the mesh size and model complexity:

This specific error message is a rite of passage for almost every engineering student using the version. It occurs when your simulation mesh—the digital "grid" that breaks your model into tiny pieces for calculation—contains more nodes or elements than the free license allows. Hard Boundaries of the Ansys Student License |

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Older versions were capped at 32k; newer releases (2021 R2+) allow up to 128k. Fluid (CFD/Fluent) 512,000 – 1,048,576

The limitations vary depending on the type of license you are using. Knowing these limits is crucial for planning your simulation. A. Ansys Student Version (Free Version)

This error typically triggers when your mesh (nodes and elements) exceeds the hard caps defined by your specific license type. Below is a breakdown of why this happens and how to fix it without losing simulation quality. Understanding the Limits