Tips & Tricks

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.

Handling Multiple holes for surface operations in CFD-GEOM

In the past, cutting or filling holes in surfaces with CFD-GEOM required a two step process; 1) pick the surface 2) pick the closed set of curves that forms the hole. Not a bad process but in the case of having to cut the surface with multiple holes, it was quite inefficient since you could only cut one hole at a time.

Edge Substitution for surfaces in CFD-GEOM

The Edge Substitution tool in CFD-GEOM is designed to make it easy to modify surface boundaries. It allows you to replace the lines/curve of a surface with edges, and vice versa.

Local Curve Meshing in CFD-GEOM

Computational geometries/assemblies often involve parts that may vary in scale. Although unstructured surface meshing adapts to the size of the geometry, in some cases there may not be sufficient grid density in specific regions of your model.

Geometric Precision and Filtering in CFD-GEOM

In many cases, CAD models can be dirty and thus do not import well into CFD-GEOM. Repairing these geometries can often take considerable time and effort. Many times, duplicate points, lines, and surfaces are created when importing CAD geometries.

Parametric studies using CFD-GEOM and SimManager

Parametric studies controlled by SimManager give the useful ability to perform several routine simulations. It allows to use CPU time more effectively and reduce user interaction. In other words, it is possible to automate the process of mesh generation in GEOM, model setup in CFD-AGE-GUI, solver run, and visualization in CFD-VIEW. In this user tip, automatic geometry manipulation and mesh creation will be discussed.

Semi-Structured Domain Stitching in CFD-GEOM

A feature that allows users to stitch together a Semi-Structured domain is available in CFD-GEOM. This feature gives the user flexibility of stitching two end faces with different topologies, i.e. a geometry that cannot be extruded.

Transparency Feature in CFD-GEOM

In CFD-GEOM, certain entities can now be set to transparent. This option allows you to add transparency effects to your surfaces, faces, and volumes. This can be an excellent way to add shadows/colors and glass effects to the model.

Using the Construction Plane in CFD-GEOM

Point entities in CFD-GEOM are placed in an XYZ (Cartesian) coordinate system. The Construction Plane tool enables you to position a plane in space, and place points on that plane to generate curve entities.

CFD-GEOM Viewer Hot Keys

Most of the time users deal with real world problems which are usually 3D. 3D geometries and grid generation can be difficult to mesh depending on the complexity of the geometry. Working with 3D geometry and grid generation can be made lot faster with effective use of the Hot Keys available in CFD-GEOM.