Using CFD software is often a challenge as the number of parameters a user has to control can seem endless
and their interactions are often non-linear or simply confusing. While experience and trail-and-error with time
will often lead to good results, this approach is not very scientific. At MANTIUMCAE optimization software
such as OpenMDAO is used to adjust CFD process specific parameters. Running DoEs and optimizations,
statistical methods are used to derive optimal sets of parameters for applications such as external aerodynamics.
Process optimization ensures reliability with minimized run times.
Below is an example of using OpenMDAO to find parameters for snappyHexMesh to ensure surface layer
coverage over a race car while also improving overall mesh quality. Using this approach leads to much better
CFD results as the yPlus critium for the turbulence wall model is obeyed over larger parts of the geometries.
The results are compared to the snappyHexMesh settings found in the motorBike tutorial (OF 2.2.2), only the
surface layer height was adjusted to account for the used inlet velocity.
The method of optimizing the meshing parameters is applicable to any kind of CAE software which is controlled through user definable parameters and is executable in batch mode. If you are interested in improving reliability or performance of the tools used in your organization or have questions please contact us.
This offering is not approved or endorsed by OpenCFD Limited, the producer of the OpenFOAM software and owner of the OPENFOAM® and OpenCFD® trade marks.