How to improve abnormally slow computation speed in ANSYS ?

1. Increase the number of processors: Increasing the number of processors can make the computations faster by enabling multiple tasks to run concurrently.

2. Increase RAM and Hard Disk Space: Adding more RAM can help ANSYS to run faster by providing it with more resources to access data quickly. Increasing hard disk space can also help speed up computations by allowing it to store more data.

3. Optimize the Model: Optimizing the model can significantly improve the computation speed by reducing the complexity of the model and removing unnecessary elements.

4. Use Efficient Algorithms: Using efficient algorithms can help ANSYS to calculate faster. This can be done by selecting the appropriate solver and setting the appropriate parameters.

5. Utilize GPU Computing: Utilizing GPU computing can significantly improve the computation speed by utilizing the power of GPU processors.

6. Enable Parallel Processing: Enabling parallel processing can allow ANSYS to make use of multiple processors to calculate faster.

Denis Benasciutti

What do you mean by "400000 meshes"?

How many equations has your analysis?

Rameshwar Gupta

Respected @Antoine Dupuis Sir,

Please follow some these steps for solve your problem.

reduced the number of mesh to 500 000.

Allowed for 4 cores, 90% RAM limit and GPU use in Analysis configuration.

Set the power management mode of my GPU to “Prefer maximum performance”I have reduced the number meshes to 500 000, which shouldn't be any problMy 2D.

3D projects are harder to be solved than 2D projects with the same mesh count. However, the error message "3dtds terminated abnormally" is not neccessarily related to out of memory or mesh issues.

Could you first try solving with all mesh operation disabled, and use the following initial mesh settings if your AEDT is in 2022R2 version or below?

[1]Rameshwar Gupta*,

Research Scholar,

Department of Lifelong Learning & Extension

CSJM University, Kanpur, U.P. India

Email id: [email protected]

Whatsapp/Mobile: +918630831266

[1]Ph.D. Student, Department of Lifelong Learning & Extension, CSJM University, Kanpur, U.P., India, Email id: [email protected], Mobile: 8630831266

*Single author

Rameshwar Gupta

Respected @Antoine Dupuis Sir

If you're experiencing abnormally slow computation speed in ANSYS, there are several steps you can take to improve the performance. Here are some suggestions:

Check system requirements: Ensure that your computer meets the minimum system requirements specified by ANSYS. Insufficient hardware resources, such as low RAM or an outdated graphics card, can significantly impact performance.

Optimize meshing: The mesh is a crucial factor in ANSYS simulations. A fine or overly complex mesh can lead to slow computations. Consider refining or simplifying the mesh in areas that are not critical to the analysis. You can also utilize meshing techniques like inflation layers or adaptive meshing to focus computational resources where they are needed most.

Use symmetry or simplifications: If your model has symmetry or can be simplified without affecting the results, take advantage of these features. Applying symmetry or simplifications can reduce the computational load and speed up the analysis.

Enable parallel processing: ANSYS supports parallel processing, allowing you to distribute the computational load across multiple processor cores or machines. Ensure that parallel processing is enabled in your ANSYS settings to take full advantage of your hardware capabilities.

Optimize solver settings: ANSYS offers various solver settings that can be adjusted to improve performance. For example, you can modify convergence criteria, time step sizes, or solution methods to optimize the solver's efficiency without sacrificing accuracy. Experimenting with different settings can help find the right balance.

Utilize submodeling or substructuring: If you have a large model and only need to analyze specific areas or components in detail, consider using submodeling or sub structuring techniques. These methods allow you to focus computations on critical regions while using simplified representations for the rest of the model.

Update ANSYS version and apply patches: Ensure that you are using the latest version of ANSYS. Newer versions often come with performance improvements and bug fixes. Additionally, check for any available patches or updates specific to your version, as they might address known performance issues.

Consult ANSYS documentation and support: ANSYS provides extensive documentation, user forums, and technical support. Consult these resources to understand if there are any known performance issues, best practices, or specific recommendations for your particular simulation type.

By following these suggestions and optimizing your ANSYS setup, you should be able to improve the computation speed and overall performance of your simulations

[1]Rameshwar Gupta*,

Research Scholar,

Department of Lifelong Learning & Extension

CSJM University, Kanpur, U.P. India

Email id: [email protected]

Whatsapp/Mobile: +918630831266

[1]Ph.D. Student, Department of Lifelong Learning & Extension, CSJM University, Kanpur, U.P., India, Email id: [email protected], Mobile: 8630831266

*Single author

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