PreonLab 5.3 Released

We are excited to announce the release of PreonLab 5.3. It improves upon features from previous releases and adds some useful new features. As always, our focus is on improving reliability, performance, and usability. Here are some of the highlights:

  • Pathlines: This release adds more options to accurately select and track fluid in regions of interest. This includes tracking particles passing by geometries in a specified time interval.
  • Airflow import: PreonLab 5.3 can better handle volumetric data saved to the Ensight Gold format and seamlessly integrates the airflow data into the simulation domain.
  • Thermodynamics: PreonLab 5.3 introduces a new heat capacity modifier, which enables thermal simulations with solids to reach equilibrium faster. This is handy for thermal applications where the results from the steady state are the focus of the analysis.
  • Usability & Workflow: Users can now track their action history for a single session and jump between two states with just a click of a button in the action log, which is a dedicated tab in the PreonLab GUI.
    This release also improves the plot dialog performance making it possible to consider an even larger amount of data for analysis than ever before.

This is just a selection of new features and improvements. Check out the changelog to learn about all the changes. 

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Pathlines Sensor

A pathline visualizes the trajectory traveled by a single particle over time. In order to generate pathlines, it is necessary to specify which particles should be tracked. Particles of interest can be defined based on a) their location in space and b) position in time.

The region in space, for which pathlines should be generated can be specified by moving, scaling and rotating the Pathlines box. With version 5.3 it is possible to consider particles either in a closed volume or based on their proximity to a geometrical surface within the Pathlines box.

The point in time in which particles should be tracked can be specified by a single capture frame or by a capture frame interval. It is also possible to specify for how long a pathline segment is shown during the playback of pathlines over time.

After generating pathlines, you can export them to a CSV file for further analysis.

Please agree to the transfer of data to third parties as set out in our privacy policy.

Soiling Simulation with PreonLab 5.3 – Wetting Sensor and Pathlines.

The first part of the video shows the visualization of the soiling with a wetting sensor. In the middle part of the video you can see how the particles in the wheel housing (location) are tracked over the entire time of the simulation (capture time interval). The final part of the video shows how the particles landing on the windshield of a trailing car are tracked, also over the entire time of the simulation.

Airflow import

PreonLab 5.3 seamlessly imports airflow data generated on meshes in any CAD software of your choice.

The updated algorithm reads the information from volume datasets stored in the Ensight Gold format and made up of n-faced polyhedrons, like tetrahedrons, or hexahedrons. While datasets with polyhedrons made up of only planar faces are most efficient, the algorithm can optimize for volumes with non-planar faces, too.

The volumetric Ensight Gold data does not get converted into PreonLab’s binary format for volume data, which saves time when setting up the simulation and does not increase the disk usage of the scene. The imported airflow data can be visualized using the velocity field visualizer as usual.

Heat Capacity Modifier - Faster Steady State

The new heat capacity modifier enables the simulation to reach thermal equilibrium faster. This is beneficial in cases where the user is not interested in the transient behavior of the heat transfer. 
The modifier is applied to the specific heat capacity of the solids involved.

The following video gives a good idea of how the modifier affects the simulation: 

Please agree to the transfer of data to third parties as set out in our privacy policy.

The new heat capacity modifier enables thermal simulations with solids to reach equilibrium faster.

The red curve shows that the simulation without any modifier requires 8 physical seconds until convergence. A heat capacity modifier with factor 2 on the other hand, results in the steady state being reached within 2 physical seconds, as is shown by the green curve. 
As a result, total physical time can be reduced, and it is possible to reach the more interesting part of the simulation quicker.

Usability & Workflow

Users can now track their action history for a single session and jump between two states with just a click of a button in the action log, which is a dedicated tab in the PreonLab GUI. This improves the workflow during simulation setup as well as post-processing. The new and previously used values for each changed property are displayed for a convenient overview of all actions. 

The usability of the plot dialog performance has been improved based on your feedback to aid with your most challenging simulation datasets. 
The plot dialog can now handle larger amounts of data than ever before and updates the time axis in the plot dialog automatically based on the scale of the simulation.

Please agree to the transfer of data to third parties as set out in our privacy policy.

This video shows the new action log tab and the automatic update of the time-axis in the plot dialog.

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Other changes

Check out the changelog for a full list of changes. To learn more about the new features, have a look at the updated manual. We hope you will enjoy working with PreonLab 5.3 and are looking forward to your feedback.



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