Tips & Tricks

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.

Digital Signal Processing using CFD-VIEW

Signals (stream of data) obtained from physical or numerical experiments often require additional processing to understand/interpret the physics they represent. The processing of signals through digital means is termed Digital Signal Processing (DSP).

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.

Plotting Multiple Variables in the CFD-VIEW Plotter

Plotting two or more variables on same plot having values of different magnitude/scale becomes difficult or many times impossible. In these cases plotting data with multiple Y-axes becomes very useful and sometimes necessary.

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.

Importing external data in the CFD-VIEW Plotter

Comparing computational results to experimental data is a task often asked of CFD analysts and engineers. The line/curve plotter in CFD-VIEW is commonly used for plotting computational results along curves, such as line probes, surface slices, time histories, etc. CFD-VIEW offers a feature that allows users to import experimental or other external data in the same plot, thus making it easy to compare results.

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.

User Defined Curve Probes in CFD-VIEW

CFD-VIEW allows the user to create curve probes from a file containing XYZ data. This feature gives the user flexibility of collecting data on any specified/desired curve in the computational domain. As an example of use, these "curved line" probes could be used to sample simulation data at the same locations that experimental data was collected.