Fundamentals / CFD

Computational fluid dynamics fundamentals

CFD describes velocity, pressure, temperature and species transport in engineering flows. Its value depends on a model matched to the development question.

Visualized streamlines from a CFD calculation
Services

CFD simulation · Thermal analysis

Applications

Off-highway · Rail · Process & plant engineering

From component to computational model

CAD geometry, the fluid domain and operating data are converted into a numerical model. Small design details are retained where they affect flow, pressure loss or heat transfer.

The model may be steady or transient and can include turbulence, buoyancy, multiphase flow, rotation, compressibility or heat transfer as required.

Typical questions

CFD supports assessment of air and liquid flows in components and complete systems.

  • Air distribution, cooling and hot-air recirculation
  • Pressure loss, flow rate and system curves
  • Heat transfer and temperature distribution
  • Aerodynamic forces, moments and wakes
  • Mixing, species transport, smoke and gas dispersion

Output and limits

A simulation provides fields, balance quantities and variant comparisons. Its scope depends on geometry, boundary conditions, property data, mesh and physical models.

Measurements remain important when predictive accuracy must be demonstrated for a specific physical arrangement.

Your application

Which engineering question should the model answer?

Discuss an engineering question