This article reviews the latest updates and available features for our on-demand, CFD simulation software EXN/Aero. In addition, we've also added to our engineering service portfolio with an Onboarding Program and Discovery Project to further support those wishing to use simulations in their projects.
Getting the most out of EXN/Aero
We have made a number of updates to help you make full use of the software, allowing you to report bugs more easily and access the user-manual, release notes, and demo-cases quickly and easily.
Significant updates have been made to the GUI; in particular surface highlighting. Before surface highlighting, when the user selected a given surface only the wire frame of that surface would highlight, which was functional but often confusing for complicated geometry. The 'surface highlighting' does just that, highlighting the entire surface, not just the edges. Not only does this make the GUI cleaner, it also makes problem setup more intuitive.
We've also added the block/boundary sector. This basically keeps track of which blocks and boundaries the user has already assigned so they do not double assign or omit a block; again, greatly improving the problem setup experience.
Most of our recent development has been focused on improving solution robustness. The biggest of these developments is the addition of gradient limiters, preventing large unrealistic swings in values that could cause a user's simulation to diverge during startup due to poor initial conditions. This allows a user to spend less time meshing and less time fiddling with initial conditions to get their simulation to start.
OpenFOAM SnappyHex Meshes
EXN/Aero now supports OpenFOAM SnappyHex meshes. The GUI can now read in a mesh directory made in OpenFOAM and convert it to the CGNS standard. With many smaller outfits using OpenFOAM due to its open source, being able to keep the meshing part of their workflow and convert their solver to EXN/Aero is a big advantage.
Onboarding Program & Discovery Project
The Onboarding Program has been designed to allow us to support you on a particular project and to get the most out of EXN/Aero. We'll help you to mesh, set up, simulate, and post-process to achieve and evaluate the best results of an active project, devising a training and support program around you and your team. The Onboarding Program costs just $2,500 for 30 days, providing you with all the benefits of the platform and a dedicated team.
If you'd rather let us run the project simulations for you, the Discovery Project is for you. You just tell us what you’re looking to analyze or visualize and we will prepare what you’re looking for, returning all the visual data (2D, 3D images & animations) as well as full engineering data to you at the end of the project. The project is a great way to learn what impact CFD can have in your operations. You’ll be pleasantly surprised at how affordable it is, and our EXN/Aero platform reduces simulation times by up to 20x by using super computing technology.
EXN/Aero Improvements & Features
New updates and improved features are shown in bold.
- Surfaces now display in the GUI greatly improving setup experience
- Added boundary selector in GUI to improve user experience when many boundaries present
- Added gradient limiters (as Beta) to improve solution stability
- Barth Jesperson advection scheme is now available for energy calculations, improving unstructured mesh stability
- Unstructured boundaries can now be initialized via databases
- Steady state relaxation for conjugate heat transfer cases has been improved
Current Key Features
- Many-to-many mesh connections
- Property user tables
- Six-degree of freedom (6DoF) prescribed vehicle motion
- Conjugate heat transfer
- Vaporization and porous conjugate heat transfer
- Solution monitoring
- LES Smagorinsky-Lily
- LES K-subgrid
- Non-Newtonian fluids
- Specified mass flow rate outlet
- Compressible and incompressible flows
- Energy equations
- SST DES, SST RANS, SST k-omega
- LES canopy
- Porous media zones
- Drag based porous media for canopies
- User defined databases
- Multifluid models for droplet transport
- Synthetic turbulence generation for LES
- Steady state & transients
- Ideal gas models
- Mixed mesh precision
- Hybrid meshing (unstructured, structured)
- Buoyancy driven flows
- Graphical user interface
- Statistics calculator
- Passive scalar
- Rotating frames-of-reference
Beta Features (functional, being refined)
- Gradient limiters
- Advection scheme selection
- LES WALE
- Syturb – synthetic turbulence
- SEM – synthetic turbulence
- Ngon general element types
Features Under Development
- Porous conjugate heat transfer
- Free surface modelling using the VOF method
- Space and time parallelization (parareal)
- Multiphase/multicomponent fluid model
- Six-degree of freedom (6DOF) coupled vehicle motion
- Fully coupled DQMOM
- Overset mesh
- Moving mesh (ALE)
We have a very skilled team of developers and engineers working on getting these features launched. We also work with customers on joint development projects when there is a strong need for a particular feature. To learn more about how we've used these features in models, please see our validation & demo cases portal at the link below.