Altair nanoFluidX 2022.2 Release Notes


  • The 2022.2 SimLab and nanoFluidX workflows are now a single-window environment. This major update improves accessibility.
  • Most fluids in reality are non-Newtonian. A new nanoFluidX feature enables exploration of Cross model fluids.

New Features

SimLab compatible output
nanoFluidX Companion, nFX[c], now outputs a format which can be read and used in SimLab 2022.2 for post-processing. This feature, alongside SimLab’s ability to run nanoFluidX inside the window, creates a single-window environment.
Refer to the SimLab Release Notes for further new features related to nanoFluidX.
Non-Newtonian fluid physics
This feature allows exploration of Cross model fluids.


Optimization of SPH Kernel performance
The implementation of Quintic Spline SPH Kernel is slightly changed to reduce instruction count. The improvement in performance is up to five percent with no repercussions. In general, there should be no noticeable changes.
Corrections to acceleration terms on solids
nanoFluidX now considers acceleration changes in the treatment of boundary conditions when using variable body force. There should be no noticeable changes.
Accessing Tutorial Model Files
You can click a link within a Tutorial to download the required model file(s).
Important: This download option is only available if you (or any user) are connected to the internet. Users attempting to download a model file will be prompted with further directions on how to access the model file online. A zipped package of the model files can be downloaded from the Altair One Marketplace and extracted to a local machine or directory on your company’s local server.

Known Issues

The following issues will be addressed in a future release, as the software performance is continuously improved.
  • When using the adhesion coefficient for the SINGLE_PHASE surface tension model, the surface tension coefficient must be calibrated against experimental results or visually estimated. If you use the Tartakovsky model, the physical surface tension value is sufficient.

Resolved Issues

  • Wallclock time-based recon output occasionally hangs.
  • Aeration-viscosity models were deprecated in the 2022 release because the models required a set of parameters which were difficult to obtain and/or required calibration.