Tips & Tricks

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.

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.

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.

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.

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.

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

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.

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.

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.

Creating Multiple Blocks from a Single Mouse Click

Computational Fluid Dynamics initiated in structured grid context for smooth and orthogonal structured grid on relatively simple geometries. Today, CFD has evolved encompass multi block and overlapping structured grid techniques for complex geometries, along with other mesh types such as tetrahedrals, polyhedrals, and prisms.