Wind Energy and Wind Farm CFD simulation show that Converge is not only for Internal Combustion Engines (ICE)

Wind farm data from CSI, makers of Converge visualized using EnSight.

Wind Turbine Site Model, Clip through model, Streamlines. from EnSight by CEI Software on Vimeo.


We used texture maps to make the terrain look like rolling grasslands, clip planes to show the velocity in a fixed altitude plane, and if you look carefully you can see the mesh adapting to moving blades as well as to greater or lower variable gradients.  There’s a 2nd viewport showing the pathlines of the flow.

We liked that, but thought we’d go a little deeper and use a more advanced technique.  What if we changed the clip transparency to be nearly invisible for low speed flow and more opaque when things go interesting. This particular animation, the clip plane’s opacity is changed dynamically through the velocity variable so that regions of high velocity are opaque, and regions of low velocity are translucent. The alternative view shows streamlines seeded from the turbine blade.

Wind Turbine Site Model, Clip through model, Streamlines. from EnSight by CEI Software on Vimeo.


In this particular visualization, the clip plane in the main view is colored with velocity and the the engineer can inspect the changing grid resolution in response to the flowfield gradients. In the alternative view, inspection of turbulent kinetic engery isosurfaces can help yield information regarding the influence of the various large obstacles in the field (hills, towers, etc) which are generating additional turbulence.

Wind Turbine Site Model, Clip through model, Streamlines, Isosurfaces from EnSight by CEI Software on Vimeo.

EnSight is useful for looking at this kind of data. We could have gone further and done a keyframe animation fly-through as well, but that would have probably looked like showing off.  (keyframe animated Converge model available here).

Converge data is almost perfect for EnSight, its CFD, its transient, and Converge’s moving parts and adapting mesh and growing model sizes are no problem for EnSight.  EnSight 10.1 introduced native polyhedral element support.

Want to see more models solved with Converge and post-processed using EnSight, visit the Converge page in our video gallery.

P.S – if you make CFD data, for example you have a CFD solver that outputs data in a form EnSight can read and want to send an interesting dataset like CSI did, we’d like that.


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