DNS 1-5 Storage Format
Storage Format
The statistical data provided is stored in the vtk format, e.g, filename.vtk [1]. The .vtk file can be easily read through the open-source Paraview software, a multi-platform application for data analysis and visualization [2]. Datasets are delivered as compressed file (.tar.gz).
Instantaneous data format
The dataset consists of a single .pvtu file per snapshot, directly referencing all the nondimensional variables and their spatial derivatives as well as the node positions. For the sake of handling, the instantaneous data was extracted from a limited region of the computational domain shown in Fig. X.
The names of the provided variables are:
- pressure, ;
- temperature, ;
- velocity component in x-direction, ;
- velocity component in y-direction, ;
- velocity component in z-direction, .
The spatial derivatives of each variable are named as variable_di where i={x,y,z}, e.g., u_dy is the derivative of the first component of the velocity vector with respect to the x-direction.
All the quantities are made dimensionless with respect to the reference state.
Statistical data format
The dataset consists of a set of .pvtu files, possibly grouping similar statistics:
- averaged_fields.pvtu:
- averaged velocity,
- averaged pressure,
- averaged density,
- Reynolds_stress.pvtu: all the 6 components of the Reynolds stress tensor,
- Favre_triple_velocity_correlation.pvtu: all the 10 components of the triple velocity correlation,
- pressure_velocity_correlation.pvtu: the 3 components of the pressure-velocity correlations,
- scales.pvtu:
- Taylor microscale,
- Kolmogorov length scale,
- Kolmogorov time scales,
where and range between 1 and 3 and , , are alias of , , .
References
Contributed by: Francesco Bassi, Alessandro Colombo, Francesco Carlo Massa — Università degli studi di Bergamo (UniBG)
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