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Tips & Tricks
Exporting STL Files From CFD-GEOM
A CFD simulation process starts from an accurate representation of the boundaries that usually originates directly from CAD systems. STL and IGES are two of the most common output formats used as a starting point for mesh generation. STL (StereoLithography) files represent 3D surface geometries using a triangular mesh allowing unambiguous transfer of files from one system to another.
Abraham
Meganathan
CFD
Plotter Operations with CFD-VIEW
The Plotter operator in CFD-VIEW supports signal processing for Time History data. A previous user tip – Digital Signal Processing using CFD-VIEW – shows how time history date can be made available and how to perform a PSD on a periodic signal. The aim of this new user tip is to list all options supported by the Plotter Operator.
Abraham
Meganathan
CFD
Wireframe Display in CFD-VisCART
Rotation, zoom, pan and other graphical operations require re-drawing of the model in the new position within the graphics window. When dealing with large models, these operations can slow down considerably due to the huge amount of graphical data that needs to be processed and re-drawn.
Abraham
Meganathan
CFD
Getting Average Quantities in CFD-VIEW
Many times, post-processing results requires computing average quantities of variables over a surface or volume. CFD-VIEW makes it easy with three calculator functions under the ‘Miscellaneous’ function category, as shown in Figure 1.
Abraham
Meganathan
CFD
Avoiding Chimera Errors in CFD-FASTRAN
This note discusses a common error encountered by users when trying chimera meshes in CFD-FASTRAN. Such errors are easy to avoid and hopefully this note will assist you.
Abraham
Meganathan
CFD
Inverting Models in CFD-CADalyzer
Computational Fluid Dynamics (CFD) requires the discretization of a geometry bounded by it's wetted surfaces. In CAD, the solid parts are created without the corresponding fluid volumes, i.e. negative space.
Abraham
Meganathan
CFD
Using Levels in CFD-GEOM
Handling large models in CFD-GEOM is quite easy, but often there are thousands of entities, making it hard to sort out particular entities among them all. For cases like these, a visual grouping mechanism in CFD-GEOM makes viewing such models very efficient. Levels in CFD-GEOM are used as a visual grouping tool, allowing you to Show/Hide certain parts of your model easily and quickly
Abraham
Meganathan
CFD
Copy/Paste Viewpoint tools
Usually, when performing a particular simulation, it is necessary to compare the results of similar models or the same model at different operating conditions. It is important that the two (or more) cases being compared be viewed from the same angle and at the same zoom level.
Abraham
Meganathan
CFD
Hybrid Meshing in CFD-GEOM
Hybrid meshes can help in optimizing grids in complex geometries allowing for structured meshes in one part of a geometry, while using unstructured grids in more complex regions. This tip will show you how to create a simple hybrid (structured/tetrahedral) mesh system in CFD-GEOM, as shown in Figure 1.
Abraham
Meganathan
CFD
Motion Model Dependencies in CFD-FASTRAN
Moving-body models available in CFD-FASTRAN are highly suited to simulate complex prescribed and six-degree-of-freedom (6DOF) motions of rigid bodies. In many engineering problems, this translates to multiple bodies moving relative to one another.
Abraham
Meganathan
CFD