Skip to content

Home

Jump to bottom
S. Scott Collis edited this page Feb 22, 2020 · 13 revisions

Dyniso is intended to be a very-simple, 3d homogeneous, isotropic turbulence simulator using OpenMP (SMP node-level parallelization) with the primary purpose to serve as an educational example.


Isocontours of vorticity magnitude

Dyniso currently does not support MPI-type parallelism which effectively limits its use to rather small problems. There are other, open-source isotropic turbulence codes that have more features and that support MPI domain-decomposition parallelism that are likely better for more serious use and you are encouraged to explore those projects.

The primary features of Dyniso:

  • Incompressible Navier-Stokes equations
    • Large-Eddy Simulation (LES) using
    • Constant coefficient Smagorinsky model
    • Dynamic Smagorinsky model
    • Fourier pseudo-spectral method in space
    • RK2, RK3, and explicit Euler time integration
  • Variety of initial conditions
    • Synthetic turbulence initial condition
    • Taylor-Green vortex initial condition
    • Restart capability
  • Fortran90 implementation with:
    • OpenMP loop-level parallelism
    • Support for vectorization (SSE)
    • Single or double precision support
  • Builds with:
    • GCC (with Gfortran) on Linux and Darwin
    • ICC (with ifort) on Linux
    • IRIX (hard to find nowadays)
  • Visualization output in Plot3d format, recommend using Paraview.

Dyniso does require access to a compatible FFT library on your system. Options include:

  • FFTW v2
  • Intel MKL
  • SGI Complib
  • Cray FFT libraries
  • And it is easy to implement interfaces to other FFT libraries.

For more information, see Dyniso Installation and Usage Guide.

Clone this wiki locally