Examples of what you can produce with EnSight

CFD post processing yields bioluminescence effect from Flow-3D ship model

A very nice movie was made by Aric Meyer over at CEI China (http://ensight.wpengine.com.cn) of Flow-3D data of a ship plowing through the sea.  This is indeed a CFD post processing animation, created by EnSight, not created by some Hollywood special effects software.  The model was created by XC Engineering of Italy, again using Flow-3D from Flow Science.

Aric Meyer over at CEI China told us how he accomplished this cool effect.

“I was working on some demos for a ship prospect using the data from Flow3D and XC Engineering. At one point I happened to make the scene look like “bioluminescent dinoflagillates” which glow when they are disturbed. If you’ve seen the movie “Life of Pi” there was a scene with the same or similar phenomenon in the scene when the whale jumps out of the water. Maybe not useful for most engineering, but it looks cool. The effect is made by using a texture set to ‘modulate’ and the water surface is colored by turbulent KE, which is white for high values and black/grey for low values.”

I haven’t seen “Life of Pi” yet, but I’m looking forward to it now.

 

Related Flow-3D CFD Post Processing News

Flow Science has selected EnSight as their technology partner for future CFD post processing developments, after comparing all the CFD post-processing products in the market.

You can also use textures in EnLiten files.  Sample EnLiten file using textures found here.

CEI is for the 2nd year in a row the exclusive visualization partner for the Flow-3D Users Conference coming up in June in Madrid, Spain.

How to post process Flow-3D data using EnSight is covered in a few short video tutorials which can be found here.

search for flow-3d in the text field, EnSight is used for CFD post processing on Flow-3D CFD data
How to find the Flow-3D tutorials for post processing. Click on the image to go to the first tutorial.

 

 

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

We got some interesting data a little while ago.  It was from CSI, makers of Converge, but it wasn’t of an internal combustion engine (ICE).  We normally associate CSI and Converge with ICE.  Instead it was of a wind farm, you know green energy and windmills.  So we cracked open the data and came up with some nice visualizations of the data using EnSight.

[mediacore link=”http://ceisoftware.mediacore.tv/media/wind-turbine-site-model-clip-through-model-streaml” height=”225″ width=”400″]

 

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.

[mediacore link=”http://ceisoftware.mediacore.tv/media/wind-turbine-site-model-clip-through-model-strea-2″ height=”225″ width=”400″]

 

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.

[mediacore link=”http://ceisoftware.mediacore.tv/media/wind-turbine-site-model-clip-through-model-strea-3″ height=”225″ width=”400″]

 

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.

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).

We didn’t want to lose the main story here, Converge is not just using its advantages for internal combustion engines anymore.

P.S. – 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.  What don’t we like, well its full of polyhedrals and EnSight 10.0 and prior versions convert polyhedrals to other more primitive types which takes more memory and is slower for EnSight. But in EnSight 10.1 coming in late spring early summer we will intro duce native polyhedral element support.  Memory usage and performance are expected to improve.   Want to see more models solved with Converge and post-processed using EnSight, visit the Converge page in our video gallery.

P.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.

 

River Flooding, Tsunami and Groundwater Simulations

We’ve noticed a surge in interest in EnSight for visualizing flooding and other groundwater control simulations.

Yes, we do have translation routines for both River-FLO, FLO-2D, MIKE21_FM, and MIKE21_Classic formats. These translation routines to convert these formats into EnSight Case Format, which can then be read into and visualized with EnSight.

Summary of the different translation routines on our Python Exchange Website:

http://pythonexchange.com/2012/05/29/river-flood-simulation-tools/
You can find details about the different translation routines, some examples of aerial photo application onto the model, special time annotations, as well as a video tutorial showing one of the translation routines in action, as well as some of the fundamental benefits of utilizing EnSight for visualization of these types of river & flood tools.

You can also find on our gallery website some of the animations and engineering quantification of River & Flood simulation results using EnSight:

 

River Flood simulation. Simulation courtesy of Wood Rodgers, using MIKE21 Classic. Dataset read into EnSight, and visualized using EnSight 10. Keyframe animations, aerial photo texture mapping, isovolume calculation, graphs of the area effected over time, max depth, as well as profiles through the simulation.

 

This short animation illustrates the power of EnSight’s interactivity. In this video, we have first created a clip through the flood as a “cross-section”. We then graphed the depth along this cross section in the plotter. Next, the interactivity of EnSight now allows the user to interactively drag the cross-section to anywhere they would like, and the plot automatically updates instantaneously. Simulation results courtesy of Wood Rodgers.

 

Animation of the river flood event in EnSight. In this animation, we have used EnSight’s 3D arrow along with the interactive query of the max depth to illustrate to the user the dynamic location of the maximum depth as time develops. Simulation results courtesy of Wood Rodgers

 

Are you involved with River and Flooding simulations? Are there specific aspects to the simulation that you are trying to capture and illustrate? We’d like to hear more about this type of work and see where EnSight can help you analyze, visualize, and communicate those results.

Prometheus Engineers Improved Fire

“Communicating the results of CFD analysis is critical to a successful project and our business.  It can be difficult to explain to someone not familiar with CFD what they are looking at.  The ease with which we can change views, compare different cases side-by-side, and create animations in EnSight allows us to provide the necessary perspective to our customers for a more successful presentation.  Furthermore, the ability to use macros to format the data is invaluable for reviewing results quickly and efficiently.  ”  Emmanuella Sotiropoulou, Vice President, Engineering Prometheus Applied Technologies, LLC. Solver used was Converge from Convergent Science Inc.