/MHIT36

MHIT36

Primary LanguageFortranGNU General Public License v3.0GPL-3.0

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GPU-based Finite difference code for DNS of Multiphase Homogenous isotropic turbulence (PFM and particles)

Main developer: A. Roccon

Tested on:

  • Milton (1 x RTX5000)
  • Leonardo (1 x A100)

Current capabiltiies:

  • DNS of single-phase flow
  • Tracking of tracers
  • Paraview files for particles
  • Phase-field metho (not validated)
  • Surface tension forces (not validated)

Future developments:

  • Tracking of inertial particles
  • Improve integration of NS (from EE to AB)
  • FFTW for CPU debug run

Performance (NS only)

  • 64 x 64 x 64 | RTX5000@milton | 1 ms/timestep
  • 128 x 128 x 128 | RTX5000@milton | 7 ms/timestep
  • 256 x 256 x 256 | RTX5000@milton | 50 ms/timestep
  • 384 x 384 x 384 | RTX5000@milton | 180 ms/timestep
  • 64 x 64 x 64 | A100@Leonardo | 0.5 ms/timestep
  • 128 x 128 x 128 | A100@Leonardo | 1 ms/timestep
  • 256 x 256 x 256 | A100@Leonardo | 7 ms/timestep
  • 384 x 384 x 384 | A100@Leonardo | 23 ms/timestep
  • 512 x 512 x 512 | A100@Leonardo | 58 ms/timestep

Systems supported:

  • Unix + nvfortran

To run a simulation:

  • go to src folder and run ./go.sh

Parallelization strategy

  • The code is serial and exploit a single GPU, the poisson solver can be extended to use all the GPUs on the node

Output files.

  • Files containing the Eulerian fields (u_***,v_****,w_**** etc.) and the particle positions (xp_***) are stored in src/output