Our expertise

Our expertise

Why numerical simulation ?

Numerical simulation makes it possible to predict by calculation the physical behavior of a given system. This in particular makes it possible to reduce the costs of developing innovative products or processes by minimizing the prototyping or experimental phases, which are often complex to carry on. Numerical simulation, by its nature, is also an essential tool for the industrial optimization of products or processes; reducing manufacturing costs by saving materials, improving performance, increasing reliability and robustness.

Numerical simulation is thus a major asset of design assistance for the engineer when sizing a system. Many methodologies can be used to provide an adequate response to a given problem. For example:

  • The “BestEstimate” approaches consist in realizing high fidelity modeling that best approximates reality. In the nuclear industry, this method is also associated with uncertainty propagation calculations in order to be able to exploit the results (in particular for safety studies).

  • For the so-called “conservative” approaches, the calculation assumptions are adjusted in order to guard against the uncertainties intrinsically linked to the calculations. These conservations are chosen in a sufficiently broad way and make it possible to ensure that the consequences calculated are much greater than the real consequences in the event of an accident. These methods are particularly used in the fields of mechanics.

Depending on the problems encountered, we adapt our working methodologies to offer the best technical solutions to our customers.

The numerical steps
  1. Pre-processing :

    definition of the geometry, mesh, definition of the calculations hypotheses, boundary conditions, solver settings.

  2. Processing :

    solving matrix systems by the calculation code, controlling the calculation convergence.

  3. Post-processing :
    Visualization, exploitation and results analysis.

Our science skills

Structural mechanics (FEM)

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Computational Fluid dynamics (CFD)

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Thermohydraulics CATHARE 2 code

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