Simulation-Ready

Simulation-Ready Geometry

Geometry in CAESES® is ready for automated meshing with external tools. All models can be set up with fixed patch identifiers such as colors that get passed over to your simulation tools. These identifiers do not change during variation, which allows you to re-use and automate the meshing and analysis procedure for new design candidates.

Create a clean and robust 3D geometry including boundary information for CFD.

Unique identifier for important surfaces patches

Unique identifiers for important surfaces patches

These color settings can also be used to define the so-called named selections for the ANSYS mesher and the ANSYS DesignModeler. Read more.

 

Save Time by Automation

Derive robust parametric geometries for the flow and solid domains of your model as an input for your meshing and simulation software. With these support geometries, automate the CFD analysis and – if given – the structural analysis by putting everything into a single loop. These high automation possibilities can give you a massive speed-up in the early phases of a design process and save you weeks and months of time!

By using CAESES®, we could massively bring down our turbine design cycle from several months to only a few weeks.

— Nicolas Lachenmaier, Engineer for Fluid Dynamics and Thermal Analysis, MTU Friedrichshafen

Parametric turbine wheel model including parametric flow domain and structural domain

 

Clean Geometries

In addition, the generated geometries in CAESES® are typically watertight i.e. closed and absolutely clean. You will have no issues with overlapping surfaces or gaps. However, if needed, you can apply healing and snapping mechanisms to fix a surface or its triangulation. This issue is critical if your meshing software is using STL input. The coloring mechanisms are also available for sending information about the different surface patches to your meshing setup. Check out this short tutorial video about watertight meshes.

closed surface triangulation

Closed surface triangulation for clean and colored STL export

 

Individual Patch Settings

In some situations you need a finer mesh for certain patches but you don’t want to increase the amount of data for other regions. This can be done by the edit mode of the BRep geometries in CAESES®. You simply have to select the patch where you want to have a different triangulation and enter the settings for it. The new triangulation also automatically snaps to the adjacent triangles of other patches.

In addition, you can set a color for an individual patch. Both the color and the triangulation settings can be maintained even through subsequent operations (e.g. trimming, Boolean operations, filleting), i.e., these settings get propagated down to the export file.

Note that this step needs to be done only once for the baseline design. These settings are then taken for all generated designs, e.g. during design studies and optimization runs.

Assign color and triangulation settings for each individual surface patch

Assign color and triangulation settings for each individual surface patch

 

 

Healing of Imported Geometry

Often imported geometries seem to be OK and clean, but when zooming in you can detect problems such as gaps and overlapping patch edges. Such imported geometries from other software packages can be healed to some extent. CAESES® gives you options to repair adjacent curves and collapsed corner points of “unclean” geometry. This is not just a repair process for the triangulation but rather a deeper sophisticated process to clean up the underlying NURBS topologies. This makes the imported geometry ready for automated meshing and simulation tools. An example is the automated creation of flow domains for imported NAPA ship hulls.

New healing options to automatically repair imported geometries

Healing options to automatically repair imported geometries

 

More Information

There is an article about the “colored” IGES and STEP format of CAESES® that is of interest for several simulation packages such as STAR-CCM+. Another blog post “New export for CONVERGE users” gives information about coloring surface patches for robust and easy data exchange with CONVERGE CFD.

 

NEXT: CFD AUTOMATION

 


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