Johns Hopkins Turbulence Databases

Dataset description

Rotating Stratified Turbulence Dataset on 4096³ Grid:

Simulation data provenance: GHOST code (see README-rotstrat4096 for more details).

• Direct numerical simulation (DNS) of rotating and stratified turbulence using 4096³ nodes, on a periodic grid using a pseudo-spectral parallel code, GHOST.
• Navier-Stokes/Boussinesq equations are solved using a pseudo-spectral method.
• Solid body rotation force acting as the only external forcing mechanism.
• Time integration uses fourth-order Runge-Kutta.
• After the simulation has reached a statistical stationary state, 5 frames of data, which includes the 3 components of the velocity vector and the temperature fluctuations, are generated and written in files that can be accessed directly by the database (FileDB system).
• Domain: 2π × 2π × 2π
• Grid: 4096³
• Number of snapshots available: 5
• Viscosity ν = 4 × 10^-5
• Prandlt number Pr = ν/κ = 1
• Brunt-Väisälä frequency N = 13.2
• Inertial wave frequency f = 2.67
• RMS velocity U₀ = 0.83
• Scale of energy spectrum peak L₀ = 2π/k₀ = 2.5
• Integral length scale L_int = 2π ∫ EV(k)dk / ∫ kEV(k)dk = 2.6
• Froude number Fr = U₀/L₀N = 0.0242
• Rossby number Ro = U₀/L₀f = 0.12
• Reynolds number Re = U₀L₀/ν = 5.4 x 104
• Kinetic Energy Dissipation ε_V = 0.0123
• Potential Energy Dissipation ε_P = 0.0077
• Kolmogorov scale η = 1.51515 × 10-3
• k_maxη = 3.1
• GetPosition is not implemented for this dataset.