Tips & Tricks

CFD-VIEW Scripting is easier than ever with Journaling

In addition to the numerous options and tools available via the CFD-VIEW user interface, the scripting capability of CFD-VIEW allows you to perform complex data processing on your simulation results, and gives you the option to run the post-processing phase of your simulation in batch mode.

Weld Fatigue analysis based on the Dang Van Criteria

Numerical modeling of fatigue behavior has become critical for welding applications. For this purpose the ‘Dang Van criterion’ has been integrated in SYSWELD for fatigue evaluation of welded structure under multi-axial loadings. The Dang Van fatigue damage criterion is used to predict crack initiation and life duration of components subjected to damaging load. This criterion is based on multi-scale approach which assumes that shakedown occurs before crack initiation.

Materials in the database - Which material properties to use with respect to the three methods to simulate the heat effects of welding

A material is described with exactly one set of material properties. In simulation engineering - depending on the applied method and the moment in time when the simulation is carried out in the product development cycle - only subsets of a full material data set might be required. In this article is outlined which subset is used for which purpose, what is available in the database, and what can be simulated.

The challenge of simulating casting and heat treatment

Foundries that have implemented casting simulation to shorten development time, further wish to use simulation in order to reduce the cost of subsequent processing steps. This often requires the simulation of heat treatment.

CFD-VIEW: Working with cell-center data in batch mode

Many improvements have been made in CFD-VIEW that allows the manipulation of cell-center data. The latest cell-center data additions implemented in CFD-VIEW V2011.0 include, for example, support for the MinMax Probe and the Calculator.

"Per Pixel Lighting" display option in CFD-VIEW

When visualizing CFD solutions, it is often of interest to see a particular range of variable values, and it is therefore useful to be able to clip the surface coloring to that range, as to obtain a clearer view of the areas affected by the variable.

Visualizing decomposed model without zonal interface outlines

Running a simulation in parallel allows quicker turn around for larger and complex problems. Such parallel jobs require the computational domain to be decomposed into multiple zones. Such a multiple-zone file may be inconvenient to post-process in CFD-VIEW because zonal interface outlines will be visible and the original surfaces would have been split. As depicted in figure 1 below, these outlines can be numerous and may therefore hinder the clarity of the model.

Visualizing particle size effect on Spray particle trajectory

When analyzing flow vectors, one can get a general trend of the direction of the flow and locations of recirculation. But what if you need to specifically know where a particle will end up? Maybe release points need to be studied. Then, the size and mass can make a difference in the path a particle travels.

Using Macros in CFD-VIEW

In some cases, you might have to perform the same task several times to post-process your results in CFD-VIEW. This can happen for example when you are running a parametric study and need to extract the same information from all the solution files. In this case, it might be time-saving to use the Macro option of CFD-VIEW, especially if obtaining the information necessitates many operations.

Using CFD-VIEW Scripting for transient simulations post-processing

With the Python scripting capabilities of CFD-VIEW, you can quickly and easily perform the repetitive tasks you encounter when post-processing transient simulations.