Tips & Tricks

Block coarsening in CFD-GEOM

One of the challenges of using structured meshes is that the grid resolution away from the region of interest is sometimes more than necessary. The Coarsen Structured Domains tool in CFD-GEOM provides a method to coarsen structured domains (also called blocks), thus reducing the mesh size and avoiding the use of arbitrary interfaces.

Viewing Your Model in CFD-GEOM

CFD-GEOM has many tools that can make viewing and manipulating your models easier. When you create your model, CFD-GEOM will show the handles for entities that are created. These handles are more like a wire frame representation of the model.

Mirroring Tools in CFD-GEOM

The mirroring tools provided in CFD-GEOM can help in the construction of symmetrical geometries or geometries involving repetitive parts. Ideally, we should take advantage of geometric symmetry to model just one-half or one-fourth of the model or even a 2D axi-symmetric model to reduce the computational time by significantly reducing the size of the model.

Advanced Blanking and Picking Tools in CFD-GEOM

Manipulating very large, complex models can be a challenging task, especially when small features of the geometry are included. CFD-GEOM has many advanced blanking/unblanking tools, as well as advanced picking tools, that can make dealing with large models easier.

How to Generate 3D Hybrid Meshes?

This tip will show you how to create a simple hybrid (structured/tetrahedral) mesh system. A hybrid mesh can be useful when part of the geometry is simple and the other part is to complex to use a structured mesh.

Mixing Structured and Unstructured 2D Grids

One of the most common questions that occurs during CFD-GEOM Training sessions is "How do I generate mixed structured and unstructured grids?" Both grid types have their specific advantages and disadvantages, e.g. structured grids are very efficient in resolving the viscous terms, whereas unstructured grids can be used to handle complex geometries.

Using "Visual Scaling" for Models with Drastically Varying Length Scales

For models that have drastically varying length scales, it can be difficult to create the grid, setup a model, and post-process the results. CFD-GEOM, CFD-ACE-GUI and CFD-VIEW have a "Visual Scale" capability that can significantly help when working with these types of models.

Using the "Extra Variable" in CFD-VIEW

In CFD-VIEW, the Extra Variable list that appears in the Attribute toolbar is used for different purposes depending on the object type. If you are interested in knowing more about this feature, please read on.

Selective Reading for DTF import in CFD-VIEW

When managing a model with complex geometry and/or physics, have you ever wondered how you could simplify the post-processing? You can do it easily using the selective reading capability in CFD-VIEW.

Using the Clone Feature in CFD-VIEW

As the name suggests, the Clone operator creates an exact copy of the input object. The input object could be a surface (iso-surface, plane cut, geometry surface, border object) or a volume. The drawing style of this copy (or copies) is completely independent from that of the original.