Revision as of 12:24, 16 February 2023

Storage Format

The statistical data provided is stored in the vtk format, e.g, filename.vtk [‌1]. The instantaneous data provided is stored in the XML Parallel vtkUnstructuredGrid format, e.g, filename.pvtu [‌1]. The Parallel data format does not actually contain any data but references other serial files (Serial vtkUnstructuredGrid) containing the data for each grid partition used for the computation, e.g., filename_partition_number.vtu. Both the .vtk and .vtu files 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, see Instantaneous data.

Provided variables are:

natural logarithm of dimensionless pressure, $\ln {(p/p_{s,ref})}$ ;
natural logarithm of dimensionless temperature, $\ln {(T/T_{s,ref})}$ ;
dimensionless velocity component in x-direction, $u/u_{ref}*({\sqrt {\gamma }}Ma)$ ;
dimensionless velocity component in y-direction, $v/u_{ref}*({\sqrt {\gamma }}Ma)$ ;
dimensionless velocity component in z-direction, $w/u_{ref}*({\sqrt {\gamma }}Ma)$ .

Here, $\gamma =1.4$ and $Ma=0.13455$ . 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.

Statistical data format

The dataset consists of a set of .vtk files:

averaged_pressure.vtk: averaged pressure, ${p}/p_{s,ref}$
averaged_velocity_i.vtk: averaged velocity i-th component, ${U}_{i}/u_{ref}$
Reynolds_stress_ij.vtk: the 6 components of the Reynolds stress tensor, $R_{ij}/(\rho _{ref}u_{ref}^{2})$
Taylor_microscale.vtk: Taylor microscale, $\eta _{T}/H$
Kolmogorov_length_scale.vtk: Kolmogorov length scale, $\eta _{K}/H$
Kolmogorov_time_scale.vtk: Kolmogorov time scales, $\tau _{K}u_{ref}/H$

where $i$ and $j$ range between 1 and 3 and are alias of $x$ (streamwise), $y$ (normalwise), $z$ (spanwise).

References

Contributed by: Alessandro Colombo (UNIBG), Francesco Carlo Massa (UNIBG), Jean-Baptiste Chapelier (ONERA) — University of Bergamo (UNIBG), ONERA

Front Page

Description

Computational Details

Quantification of Resolution

Statistical Data

Instantaneous Data

Storage Format

@@ Line 7: / Line 7: @@
 = Storage Format =
-The volume data provided is stored in the XML Parallel vtkUnstructuredGrid format, e.g, filename.pvtu [&#8204;[[Lib:DNS_1-5_format#1|1]]].
+The statistical data provided is stored in the vtk format, e.g, filename.vtk [&#8204;[[Lib:DNS_1-5_format#1|1]]].
-The Parallel data format does not actually contain any data but references other serial files (Serial vtkUnstructuredGrid) containing the data for each grid partition used for the computation, e.g., filename_partition_number.vtu.
+The instantaneous data provided is stored in the XML Parallel vtkUnstructuredGrid format, e.g, filename.pvtu [&#8204;[[Lib:DNS_1-5_format#1|1]]].
-Both the .pvtu (or any .vtu) file can be easily read through the open-source Paraview software, a multi-platform application for data analysis and visualization [&#8204;[[Lib:DNS_1-5_format#2|2]]]. Datasets are delivered as compressed file (.tar.gz).
+The Parallel data format does not actually contain any data but references other serial files (Serial vtkUnstructuredGrid) containing the data for each grid partition used for the computation, e.g., filename_partition_number.vtu.
+Both the .vtk and .vtu files can be easily read through the open-source Paraview software, a multi-platform application for data analysis and visualization [&#8204;[[Lib:DNS_1-5_format#2|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, see [[lib:DNS_1-5_time#Instantaneous_data|Instantaneous data]].
+Provided variables are:
+* natural logarithm of dimensionless pressure, <math>\ln{(p/p_{s,ref})}</math>;
+* natural logarithm of dimensionless temperature, <math>\ln{(T/T_{s,ref})}</math>;
+* dimensionless velocity component in x-direction, <math>u/u_{ref}*(\sqrt{\gamma}Ma)</math>;
+* dimensionless velocity component in y-direction, <math>v/u_{ref}*(\sqrt{\gamma}Ma)</math>;
+* dimensionless velocity component in z-direction, <math>w/u_{ref}*(\sqrt{\gamma}Ma)</math>.
+Here, <math>\gamma=1.4</math> and <math>Ma=0.13455</math>.
+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. :
+     * <math>R_{max}</math> = 0.0762 m
+     * <math>p_{ref}</math> = 89377 Pa
+     * <math>T_{ref}</math> = 293.15 K
+     * <math>u_{ref}</math> = 46.186 m/s
+     * <math>Ma</math>    = 0.13455 -->
 ==Statistical data format==
-The dataset consists of a set of .pvtu files, possibly grouping similar statistics:
+The dataset consists of a set of .vtk files:
-* ''averaged_fields.pvtu'':
+* ''averaged_pressure.vtk'': averaged pressure, <math>{p}/p_{s,ref}</math>
-** averaged velocity, <math>\overline{u}_{i}/u_{ref}</math>
+* ''averaged_velocity_i.vtk'': averaged velocity ''i''-th component, <math>{U}_{i}/u_{ref}</math>
-** averaged pressure, <math>\overline{p}/p_{ref}</math>
+* ''Reynolds_stress_ij.vtk'': the 6 components of the Reynolds stress tensor, <math>R_{ij}/(\rho_{ref}u_{ref}^2)</math>
-** averaged density, <math>\overline{\rho}/\rho_{ref}</math>
+* ''Taylor_microscale.vtk'': Taylor microscale, <math>\eta_{T}/H</math>
-** averaged temperature, <math>\overline{T}/T_{ref}</math>
+* ''Kolmogorov_length_scale.vtk'': Kolmogorov length scale, <math>\eta_{K}/H</math>
-* ''Reynolds_stress.pvtu'': all the 6 components of the Reynolds stress tensor, <math>R_{ij}/(\rho_{ref}u_{ref}^2)</math>
+* ''Kolmogorov_time_scale.vtk'': Kolmogorov time scales, <math>\tau_{K}u_{ref}/H</math>
-* ''Favre_triple_velocity_correlation.pvtu'': all the 10 components of the triple velocity correlation, <math>\overline{\rho u''_{i} u''_{j} u''_{k}}/(\rho_{ref}u_{ref}^3)</math>
+where <math>i</math> and <math>j</math> range between 1 and 3 and are alias of <math>x</math> (streamwise), <math>y</math> (normalwise), <math>z</math> (spanwise).
-* ''pressure_velocity_correlation.pvtu'': the 3 components of the pressure-velocity correlations, <math>p'u''_{i}/(p_{ref}u_{ref})</math>
-* ''scales.pvtu'':
-** Taylor microscale, <math>\eta_{T}/H</math>
-** Kolmogorov length scale, <math>\eta_{K}/H</math>
-** Kolmogorov time scales, <math>\tau_{K}u_{ref}/H</math>
-where <math>i</math> and <math>j</math> range between 1 and 3 and <math>u_1</math>, <math>u_2</math>, <math>u_3</math> are alias of <math>u</math>, <math>v</math>, <math>w</math>.
 ==References==

DNS 1-6 Storage Format: Difference between revisions

Revision as of 12:24, 16 February 2023

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Storage Format

Instantaneous data format

Statistical data format

References

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DNS 1-6 Storage Format: Difference between revisions

Revision as of 12:24, 16 February 2023

Storage Format

Instantaneous data format

Statistical data format

References

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