DNS 1-3 Statistical Data: Difference between revisions
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|'''Figure 13:''' Stanford double diffuser, Re=10000, validation. Average streamwise velocity fluctuations, [[lib:DNS_1-3_description#5|Cherry ''et al.'' (2008)]] and [[lib:DNS_1-3_description#1|Ohlsson ''et al.'' (2010)]] vs data obtained with Alya. | |'''Figure 13:''' Stanford double diffuser, Re=10000, validation. Average streamwise velocity fluctuations, [[lib:DNS_1-3_description#5|Cherry ''et al.'' (2008)]] and [[lib:DNS_1-3_description#1|Ohlsson ''et al.'' (2010)]] vs data obtained with Alya. | ||
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Revision as of 12:46, 18 November 2022
Statistical data
In this section the relevant statistical data for the diffuser computed with Alya is given. The reported data is the one mentioned in Table 2 of the list of desirable quantities (PDF) and also specified here.
The data is available as:
- In CSV (text) format as profiles along characteristic lines of the diffuser
- In CSV (text) format as contours along characteristic planes of the diffuser.
- In HDF5 (binary) format as volumetric data.
Other turbulent statistics
Other relevant statistics from the database are presented in this section. In particular, the turbulent kinetic energy (TKE) and the characteristic length scales (i.e., the Taylor micro-scale and the Kolmogorov length-scale ) are presented in Fig. 17 along some characteristic contours of the diffuser.
Profile data
The profile data is thought to match that of the UFR_4-16_Test_Case and the experimental data. Text files (in CSV format) are provided at the streamwise locations x/h=0, 2, 4, 6, 8, 10, 12, 14, 15.5, 17, 18, 20 and 22 at the following spanwise locations z/B=0.25, 0.5, 0.75 and 0.875. Some of these profiles are also plotted below.
Characteristic Plots of these profiles are:
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| Figure 12: Stanford double diffuser, Re=10000, validation. Average velocities, Cherry et al. (2008) and Ohlsson et al. (2010) vs data obtained with Alya. |
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| Figure 13: Stanford double diffuser, Re=10000, validation. Average streamwise velocity fluctuations, Cherry et al. (2008) and Ohlsson et al. (2010) vs data obtained with Alya. |
Contour data
Contour data is also provided to match that of the UFR_4-16_Test_Case and the experimental data. Text files (in CSV format) are provided at the streamwise locations x/h=2, 5, 8 and 15. These contours are also plotted below.
| diffuser01_contour_x2_Alya_DNS | diffuser01_contour_x5_Alya_DNS | diffuser01_contour_x8_Alya_DNS | diffuser01_contour_x15_Alya_DNS |
Characteristic plots of these contours are, on positions x/h=2, 5, 8 and 15:
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| Figure 15: Stanford double diffuser, Re=10000, validation. Average streamwise velocity contours, Cherry et al. (2008) and Ohlsson et al. (2010) vs data obtained with Alya. The positions of the contour slices are, from top to bottom, x/h=2, 5, 8 and 15. |
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| Figure 16: Stanford double diffuser, Re=10000, validation. Average streamwise velocity fluctuation contours, Cherry et al. (2008) and Ohlsson et al. (2010) vs data obtained with Alya. The positions of the contour slices are, from top to bottom, x/h=2, 5, 8 and 15. |
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| Figure 17: Stanford double diffuser, Re=10000. Turbulent kinetic energy (TKE), Taylor microscale and Kolmogorov lengthscale obtained with Alya on contour slices located, from top to bottom, at x/h=2, 5, 8 and 15. |
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| Figure 18: Stanford double diffuser, Re=10000. Reynolds normal stresses (from left to right 11, 22, 33) on contour slices located, from top to bottom, at x/h=2, 5, 8 and 15. |
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| Figure 19: Stanford double diffuser, Re=10000. Reynolds shear stresses (from left to right 12, 13, 23) on contour slices located, from top to bottom, at x/h=2, 5, 8 and 15. |
Volume data
Volumetric data on the statistics computed for the whole computational domain are provided here. For more information regarding the storage format, please refer to the storage format guidelines.
The available files are:
- Statistics (15.9 kB) Is the HDF5 master file. This is used in conjunction with the other HDF5 files to open and manage the dataset. Please refer to storage format guidelines for more information on this.
- Nodes (2.8 GB) Contains the xyz positions where data is stored.
- Inputs (26.0 GB) Contains the averaged pressure and velocity along with their gradients, the viscous shear stress and the Reynolds stress tensor.
- Additional Quantities (3.7 GB) Contains additional quantities such as the Taylor and Kolmogorov scales and the pressure autocorrelation.
- Triple Correlation (9.3 GB) Contains the components of the velocity triple correlation.
- Pressure Velocity (2.8 GB) Contains the pressure velocity correlation.
- Convection (5.6 GB) Contains the convection terms in the budget equations for the Reynolds stresses.
- Production (5.6 GB) Contains the production terms in the budget equations for the Reynolds stresses.
- Dissipation (5.6 GB) Contains the dissipation terms in the budget equations for the Reynolds stresses.
- Molecular Diffusion (5.6 GB) Contains the molecular diffusion terms in the budget equations for the Reynolds stresses.
- Pressure Strain (5.6 GB) Contains the pressure strain terms in the budget equations for the Reynolds stresses.
- Turbulent Diffusion (5.6 GB) Contains the turbulent diffusion terms in the budget equations for the Reynolds stresses.
- Pressure Diffusion (5.6 GB) Contains the pressure diffusion terms in the budget equations for the Reynolds stresses.
- Residuals (5.6 GB) Contains the residual terms in the budget equations for the Reynolds stresses.
- TKE budget terms (7.4 GB) Contains the terms in the budget equations for the turbulent kinetic energy (convection, production, dissipation, molecular diffusion, pressure strain, turbulent diffusion and residuals).
Additional data
No additional data yet.
Contributed by: Oriol Lehmkuhl, Arnau Miro — Barcelona Supercomputing Center (BSC)
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