why is Radioss solver is running very slow?

Ismail Syed
Ismail Syed Altair Community Member
edited January 2022 in Community Q&A

RADIOSS solver is taking a huge amount of time in doing itterations , for each itteration time is exponentially increasing. how to reduce it

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Answers

  • Adriano A. Koga
    Adriano A. Koga
    Altair Employee
    edited January 2022

    i suggest you to go thourhg the ebook in Altair University for Radioss.

    It will discuss the aspects that drive the solver, such as the timestep concept.

     

    Probably your timestep is too low, due to your model (element size, properties, contacts, etc).

    You can increase calculation speed, using timestep control, at some extent, but it would be nice to understand why your timestep is so small.

    You can go to the 'check elements' tool, and verify for 'time', and it will calculate your ideal elemental timestep.

     

  • Adriano A. Koga
    Adriano A. Koga
    Altair Employee
    edited January 2022
    Adriano A. Koga_21884 said:

    i suggest you to go thourhg the ebook in Altair University for Radioss.

    It will discuss the aspects that drive the solver, such as the timestep concept.

     

    Probably your timestep is too low, due to your model (element size, properties, contacts, etc).

    You can increase calculation speed, using timestep control, at some extent, but it would be nice to understand why your timestep is so small.

    You can go to the 'check elements' tool, and verify for 'time', and it will calculate your ideal elemental timestep.

     

    https://altairuniversity.com/free-ebooks/free-ebook-crash-analysis-with-radioss-a-study-guide/

     

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