hit

Homogeneous isotropic turbulence box configuration

Code for DNS of turbulence in homogeneous isotropic turbulence. Solution of Navier-Stokes equations + phase-field method (ACDI). For time integration, a fully explicit scheme is used: RK4 for ACDI + AB2 for Navier-Stokes.

Check list of features implemented

• Uniform grid along all three directions
• Poisson solver based on full 3D FFT
• Domain size: $2\pi$ along all three directions

Autotuning of decomposition

• Default: pr=0 and pc=0 → enables automatic process decomposition.
• Only input needed: total number of MPI tasks.
• No recompilation required when changing MPI processes.

Optional features (conditional compilation)

• Phase-field module: Can be enabled or disabled. Default is single-phase.
• Particles (tracers): Can be enabled or disabled. Default is single-phase.

Homogeneous isotropic turbulence box

• HIT at $Re_\lambda=200$, Grid: $512 \times 512 \times 512$

Nodes numbering and staggered grid

X-pencil configuration: