There are a few remaining places left on the NAFEMS seminar," Industrial Turbulent Flows: CFD Simulation and Validation " - 6th Feb 2003. I Mech E, London

Do you trust the results of your CFD analysis?
How do you justify that trust and demonstrate it to your boss and customers?

These are the questions addressed by this NAFEMS CFD seminar. This one-day awareness seminar will be held at the Institution Of Mechanical Engineers, 1 Birdcage Walk, London , on February 6th 2003.

To register please contact Anne Creechan on +44 (0) 1355 225688 or email, anne@nafems.org

Objective/Aims

Simulation validation may be defined as: 'the process of determining the degree to which a model is an accurate representation of the real world, from the perspective of the intended uses of the model.'

But how do you know if your simulation is accurate? Simulations of turbulent flows in particular can be difficult to validate and one of the comments frequently made when analysts try to obtain information to validate simulations is that if there were detailed data (either experimental or analytical) available on the simulated flow, then the simulation of that flow would be unnecessary. This is a popular misconception.

Come to this seminar and learn how validation is carried out in the real world, how real industrial analyses are validated and how you can apply these practices to your simulations. This seminar will be useful to anyone who carries out CFD, uses the results from CFD, requests CFD or manages a CFD capability.

The aims of this seminar are to demonstrate the effective use of CFD in understanding industrial turbulent flows and as a tool to aid the solution of flow related problems and improve designs. It is intended that this will be achieved by the presentation of case study style papers that illustrate the simulation of industrial flows and their validation with appropriate data.
While it is understood that it is rarely practical to validate every CFD analysis, it is generally accepted that some form of validation is required for each flow or product type simulated. Comments on accuracy improvements, simulation dangers and pitfalls and common errors are encouraged. This is an ideal opportunity for exchange of experiences and networking with users across a wide spectrum of industrial applications.

Several methods can be used to validate CFD simulations. The ideal approach, of course, would be to simulate flows that have already been assessed experimentally. This is, however, only rarely available to many industrial analysts, so validation practices used range from this rigorous approach, through comparing similar designs or similar flows to hand calculations for key parameters at key locations. Often CFD is used where effective experimentation would be difficult, expensive, or dangerous. In these cases, a simulation may be validated by comparing simulated values with experimental values that can be measured easily, cheaply and safely to provide confidence that the simulation as a whole is representative of the flow of interest. For example, streamlines are expensive to visualise, requiring specialist equipment, but pressure and flow rate are generally cheap and easy to measure. As in all areas of CFD, knowledge of a flow is always necessary in producing a good simulation and this knowledge should also be applied in deciding on appropriate validation

techniques.

Places are limited, so please reserve your place now.