Run Continuation, Frequency Analysis, Flow Volume Extraction & More | SimScale Product Update 12/18

BlogAbout SimScaleRun Continuation, Frequency Analysis, Flow Volume Extraction & More | SimScale Product Update 12/18

Here at SimScale, we had numerous product updates and important features released throughout 2018. Most recently, we announced the new GPU-based solver using the Lattice Boltzmann method. In September, we introduced the new Workbench 2.0 reworked from scratch. In July, our users discovered the new online post-processor, and in March, 96-core instances became available on SimScale.

In between these highlights, many improvements were released throughout the year in our efforts to make the SimScale cloud-based simulation platform as comprehensive, accurate, and easy-to-use as possible.

With such a busy year, our product update at the end of 2018 couldn’t have been any less productive, so as that in the last week of December—right before the holidays spirit took over—we released a long list of new features ready to aid our users in all of their design projects planned for 2019.

So without further adieu, here are our live, released and ready for use features:

Run Continuation

As one of the most requested features, we finally shipped the first version of run continuation to the production system! Users are now able to continue a steady state CFD run which had finished or was canceled.

Previously, if a finished run had not yet converged to a steady state solution, one would need to extend the maximum iterations and rerun the case from the beginning, wasting precious time and core hours.

Now, you can just extend the maximum iterations and maximum runtime and continue the run from the latest time step.

More features related to this are expected to come in 2019.

Frequency Analysis

Another feature which was asked for frequently was the reactivation of the eigenfrequency analysis, which was temporarily unsupported after the removal of the CalculiX solver.
Finally, with the new workbench being released, we were able to bring back this analysis tool, but this time on the basis of the more robust Code_Aster solver, which is also used for all other structural analyses on SimScale.

Flow Volume Extraction

Each CFD simulation needs a flow domain to compute the desired velocity, pressure, and temperature fields. These flow domains are usually not needed when you design your model—let’s say a car or valve—though. Therefore, you need to revisit your CAD tool to create these flow domains—be it an outer domain for external aerodynamics or natural convection studies, an internal flow domain inside a valve, or even an electronics enclosure. Countless boolean operations later you can finally get to work.

SimScale closed this gap by adding flow volume extraction operations that allow users to create the flow domain—no matter if internal or external—directly on SimScale prior to running a simulation.

Passive Scalars for Convective Heat Transfer

With the latest release, you can now use passive scalar sources for convective heat transfer simulations. Previously, this feature was only available for incompressible analyses.

Time-dependent Heat Sources for CFD

The power output of heat sources in conjugate and convective heat transfer simulations can now be specified as a time-dependent function using a table editor or by uploading a CSV file.

Live Post-Processing

For all CFD analysis types, it is now possible to already post-process the result of a running case. This enables users very early in the development of the flow to spot potential problems with the setup or convergence of the results without the need to wait until the run is finished.

As soon as there are results stored by the run (according to the settings of the write control), the Solution Fields appear in the simulation tree and the results can then be visualized in the online post-processor. At the current state, new results of the running case are only added to the post-processor upon refresh of the session (close + reopen the post-processor window).

Thermal Resistance Networks for Conjugate Heat Transfer

The thermal resistance network advanced concept allows modelling of electronic components using a network of resistances. The network consists of 6 points: the board, the top, four sides, and the junction. The geometrical representation of the electronic component is restricted to simple cuboidal shapes. Heat load is assigned as a source in the central point of the network, i.e., the junction. The thermal resistance network advanced concept will automatically plot the junction temperature in result plots. To assign the electronic component in your model to the thermal resistance network item, click on its top face in the CAD model. Multiple components can be assigned to a single item, which allows you to share the resistance and power settings.

Modelling an electrical component is quicker than solving its solid domain, especially if the solid or assembly of solids is complex. SimScale has introduced the ability to model cuboid components using the star resistance model. By using this model, the junction temperatures can be calculated and used at the boundaries of the components domain.

Conclusion

We hope you find this SimScale product update and new features guide useful. With some exciting plans already underway for 2019, stay tuned!


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