CFD - what it is?

Computational Fluid Dynamics (CFD) is one of the fastest developing branches of science which has already found a wide range of practical applications. It is a commonly used tool in many companies, performing a knowledge-based activity especially in automotive, power and aeronautic fields.

CFD is one of the most advanced forms of modelling of thermo-hydrodynamic phenomena. The numerical method relies on the finite-volume discretization of the governing fluid mechanics (Navier-Stokes) equations on a body fitted to a computational mesh and for a carefully specified boundary conditions. Results of numerical simulations allow for an accurate prediction of such flow parameters as: velocity, temperature, volume fraction of each concerned phase, etc. in any region of computational domain. Local mesh refinement allows even exceptionally complicated geometries being treated in detail, keeping the number of grid points at the minimal level. Such a modelling approach overcomes the possibilities of other simplified methods as for instance: zero- and one-dimensional models.

 Application of CFD approach allows to reduce the time required for performing a long and exceptionally expensive experimental studies, e.g. with the use of aerodynamic tunnel. CFD also allows to determine accurate values of physical properties in cases, in which the use of modern measuring instruments is exceptionally difficult or even impossible.

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