Turbulence statistics for an unsteady lock-exchange gravity current during the slumping phase.

Dataset of a lock-exchange gravity current propagating over a mild slope for the computation of turbulence statistics. <p>Data available at t =12.5 s after start of the computation (t_adim = 29.1). The data are saved in the range -0.58 m < x < 2.895 m in the x-direction which encompasses the whole length of the current at this time step.</p> <p><br> </p> <p>. List of files:</p> <p> - data_t291_vtk.tar.gz</p> <p> -> Contains the 200 simulation results at t_adim = 29.1 used for the statistics calculation. The data are in dimensional form</p> <p> - fields_turbulence_statistics_ensembleAveraging_t29.1</p> <p> -> Corresponding ensemble- and spanwise-averaged statistics</p> <p><br> </p> <p>. Scaling quantities for non-dimensionalisation:</p> <p> - Velocity: u_b = 0.349 m/s</p> <p> - Length: H/2 = 0.15 m</p> <p> - Time: t₀ = (H/2)/u_b = 0.43 s</p> <p><br> </p> <p>. Initial computational domain size:</p> <p> - Lock length: L_x.lock = 0.58 m</p> <p> - Channel length: L_x,channel = 5 m</p> <p> - Domain height: H = 0.3 m</p> <p> - Domain width: L_z = 0.4 m</p> <p> - Inclination: tan(a) = 2%</p> <p><br> </p> <p>. Physical conditions:</p> <p> - density light fluid: rho₀ = 997.3 kg/m³</p> <p> - density dense fluid: rho₁ = 1080 kg/m³</p> <p> - kinematic viscosity: nu = 8.7327 10^-7 m²/s</p> <p> - density diffusivity: kappa = 8.7327 10^-7 m²/s</p> <p> - gravity vector: g = 9.81 m/s²</p> <p> - Reynolds number: Re_b = u_b(H/2)/nu = 60 000</p> <p> - Schmidt number: Sc = nu/kappa = 1</p> <p><br> </p> <p>. Grid resolution</p> <p> - Uniform mesh spacing: delta = 0.0054 m</p> <p> - first vertical mesh spacing at bottom wall dy₁ = 0.0002 m</p><p><br></p><p>. Initial conditions:</p><p>- -0.45 < u_i/u_b < 0.45 and m = 1 for x < 0</p><p><br></p><p>. Boundary conditions</p><p>- Bottom: no slip wall</p><p>- side walls: symmetry</p><p>- Front, back and top walls: slip walls<br></p> <p><br> </p>