Computational Fluid Dynamics (CFD)
Computational Fluid Dynamics (CFD) is a group of numerical methods used to simulate the mechanical behavior of the fluid.
Today, with the development of computational power resources, it is possible to simulate relatively complex problems while limiting CPU time. Thusly, the CFD is an essential tool for the engineer when it comes to designing, optimization, developing stages of an innovative process, or physical analysis of complex phenomena involving fluids.
The fields of application of CFD are numerous and varied:
- Nuclear reactor core cooling calculations.
- Aerodynamic and hydrodynamic calculations (drag, lift, yaw…).
- Pressure drops calculations.
- Cooling of electronic components calculations, buildings efficiency, and thermal comfort.
- Species transport calculations (concentration monitoring, dilution, aerosol …).
- Calculations of subsonic, sonic, or supersonic flows (turbomachines, jets ..).
- Combustion calculations …
The realization and validation of a fluid mechanics simulation require thorough expertise of each stage of the modeling process. Our team of specialist engineers masters all of these steps:
- Mesh choice (choice of the type of elements, characteristics, sizes, skewness, the ratio of non-orthogonality, etc.) conditioning the validity and the robustness of the computation.
- Physics involved (choice of adapted boundary conditions, turbulence models in agreement with the studied phenomenon).
Solver and numerical settings (pressure/velocity coupling algorithm, discretization schemes …).
Postprocessing of the output results (temperature fields, velocity field, local exchange coefficient, scalar concentration, pressure drop …).
In our calculations methodologies, we attach particular importance to the validation step. We thus systematically carry out mesh sensitivity, turbulence, and solver settings and perform, if necessary, validation benchmarks for the calculation code used.