Turbulence statistics for an unsteady lock-exchange gravity current during the slumping phase.
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.
. List of files:
- data_t291_vtk.tar.gz
-> Contains the 200 simulation results at t_{adim} = 29.1 used for the statistics calculation. The data are in dimensional form
- fields_turbulence_statistics_ensembleAveraging_t29.1
-> Corresponding ensemble- and spanwise-averaged statistics
. Scaling quantities for non-dimensionalisation:
- Velocity: u_{b} = 0.349 m/s
- Length: H/2 = 0.15 m
- Time: t_{0} = (H/2)/u_{b} = 0.43 s
. Initial computational domain size:
- Lock length: L_{x.lock} = 0.58 m
- Channel length: L_{x,channel} = 5 m
- Domain height: H = 0.3 m
- Domain width: L_{z} = 0.4 m
- Inclination: tan(a) = 2%
. Physical conditions:
- density light fluid: rho_{0} = 997.3 kg/m^{3}
- density dense fluid: rho_{1} = 1080 kg/m^{3}
- kinematic viscosity: nu = 8.7327 10^{-7} m^{2}/s
- density diffusivity: kappa = 8.7327 10^{-7} m^{2}/s
- gravity vector: g = 9.81 m/s^{2}
- Reynolds number: Re_{b} = u_{b}(H/2)/nu = 60 000
- Schmidt number: Sc = nu/kappa = 1
. Grid resolution
- Uniform mesh spacing: delta = 0.0054 m
- first vertical mesh spacing at bottom wall dy_{1} = 0.0002 m
. Initial conditions:
- -0.45 < u_{i}/u_{b} < 0.45 and m = 1 for x < 0
. Boundary conditions
- Bottom: no slip wall
- side walls: symmetry
- Front, back and top walls: slip walls