What is CFD?

Computational Fluid Dynamics (CFD) is the numerical analysis of fluid flow, heat transfer and related phenomena. When used appropriately, CFD is a powerful modelling tool for predicting heat and fluid flow in real applications.

Stream Function Inc. uses both commercial and proprietary codes to analyse the flow patterns, mixing, chemical reactions and thermal behaviour of internal or external flows. A virtual prototype of the region of interest is divided into a large number of control volumes, called cells, using a mesh or grid. In each of these cells, the Navier-Stokes partial differential equations describing the fluid flow are rewritten in algebraic form that relate the pressure, velocity, temperature and chemical species concentrations to the value of neighbouring cells. These equations are then solved numerically resulting in a complete picture of the flow down to the resolution of the grid.

Advancements in the mathematical models describing turbulence, chemical reactions and radiative heat transfer have made CFD a very powerful tool in the design process. Standard problems can include:

  • Multi-species mixing flows
  • Turbulent combusting or chemically reacting flows
  • Radiative and conjugative heat transfer flows
  • Transient or unsteady flows

Validation of the CFD model is essential to ensure that the predicted effect of the process or design change can be implemented with confidence. Stream Function Inc. works with the client to obtain representative and meaningful data from the laboratory, pilot plant or plant and performs the model validation study.

In some cases physical modelling is more practical and cost effective than CFD. Stream Function Inc. possesses the experience to recommend which method is most appropriate. We provide you with a one stop modelling, using the latest technologies, in the most effective way, to save you time and money.