Solver

I really only need mean and variance fields from my transient simulations. Is there an alternative to writing a complete solution at each time step and post-processing terabytes of VTK files?

There are two ways to get mean and variance without writing out each time step.

1) For discrete, sparse locations, the simulation can be monitored using ‘monitor points’ (probes). These tell the solver to write out the field value at that location for each time step. Post processing the resulting time series is much more efficient.

2) For the continuous field, EXN/Aero includes an online statistics calculator that updates a cumulative mean and variance at the end of each time step.  Results of this method are exact in the mean, and the variance fields converge provided that the flow is statistically stationary in time.


What operating system does the solver run on? 

EXN/Aero runs in a linux environment. We currently support Ubuntu, Centos6, Centos7 and Scientific Linux. Choose your favourite!


Can I monitor my results and see the residuals as the mesh is running? 

Our monitoring tool EXN/Vizer enables users to view changes in monitored variables, residuals, and simulation performance data in real time. It reads an SQL database that is appended every 10 time steps.


Are GPUs required to use the software? 

Strictly speaking, no. Envenio is able to run on multple CPU arrays, but it is fundamentally designed and optimized for hybrid CPU/GPU architecture. Users on multi-CPU systems will not see the large increase in cost-effectiveness from running on a hybrid CPU/GPU system.

Fortunately, Envenio is making it easy to access these types of resources on a trial basis through our cloud service. Please call us to learn more about it!


What types of turbulence models are built in? 

  • Shear Stress Transport (SST)
  • Wilcox’s K-omega
  • LES Smagorinsky-Lily
  • LES WALE
  • LES with k-subgrid equation for vegetative canopy flows
  • SST – DES
in FAQ Tags: FAQGetting Started