SIEMENS STAR WITH TURBULENCE HOW TO
SIEMENS STAR WITH TURBULENCE SERIES

The CAD model of the Ahmed’s body is shown in Figure 1 (symmetry was also applied). However, I also compare my results with that of Beneke (2018) to see how Simcenter FLOEFD’s turbulence modelling and boundary layer calculations perform against those that conventional CFD has to offer. Therefore I set out to conduct my own validation of Simcenter FLOEFD against the Ahmed’s body data. It is understandable then that these data are frequently used to validate or benchmark turbulence models in the automotive aerodynamics. This study, provides extensive experimental data on the Ahmed’s body in the form of a breakdown of the total drag into the various portions of the body and their respective partial drag contributions.

SIEMENS STAR WITH TURBULENCE HOW TO

For some sound advice on how to compare CFD results (the correct way), have a look at this blog post written by my colleague Boris Marovic.Īny CFD benchmark pertaining to automotive aerodynamics starts with the Ahmed’s body as defined by Ahmed, S. Benchmarking turbulence models in automotive aerodynamicsĪs it is with any new CFD project, making sure that you are able to reliably predict the behavior or performance of the real-world application requires benchmarking a CFD model against well documented experiments (or at the very least trustworthy CFD results) of a similar application, which you can then transfer to the actual model and hopefully produce believable results. Part 1 introduced some of the main technologies that make CFD available to designers with specific examples in Parts 2 & 3 (links to the previous posts provided at the end of Part 4). Here I will aim to demonstrate the accuracy and consistency of the enhanced turbulence model in Simcenter FLOEFD, in an automotive aerodynamics application, compared against a host of turbulence models offered by conventional CFD.

SIEMENS STAR WITH TURBULENCE SERIES

This is Part 4 of a 4-part series explaining the technology behind Simcenter FLOEFD.

Siemens star with turbulence