datasetmeca:cavityflow_1
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Table des matières
3D shear-layer driven cavity flow at $Re_{L_c}= 7826$
Author : Y. Fraigneau CNRS-LIMSI (yann.fraigneau@limsi.fr)
Date : July 2020
Simulation type : DNS (Sunfluidh code)
Location : DATABASE_CAVITY3D_R2_RE7826_PER1.0_DNS/NOFORCINGTERM
Status : Free access
Data size : ~ 9.5 Gb
Simulation settings
2D sketch
Referential : cartesian geometry
- axes :
- x(i) : downstream direction
- y(j) : normal direction
- z(k) : spanwise direction
- origin :
- $x_0= 0$ : upstream edge of the cavity
- $y_0= 0$ : upstream edge of the cavity
- $z_0= 0$ : upstream edge of the cavity, at the mid-span location
Reference scales
- Density : mass density of the fluid ($\rho_0$)
- Length : cavity length ($L_c$)
- Velocity : inlet bulk velocity ($U_i$)
- Dynamic viscosity : dynamic viscosity of the fluid ($\mu_0$)
- Reynolds number : $Re_H= \frac{\rho_0.U_i.L_c}{\mu_0}= 7826$
Non-dimensionalised data
- velocity : $U^*=\frac{U}{U_i}$
- density : $\rho^*= \rho/\rho_0= 1$
- coordinates : $x*=\frac{x}{L_c}$, $y^*=\frac{y}{L_c}$ , $z^*=\frac{z}{L_c}$
Computational domain
- Domain scope
- Downstream direction(x) : $L^*= 4.0$
- Normal direction (y) : $H_t^*= 1.25$
- Spanwise direction (z) : $l^*= 1.0$
- upstream vein length : $L_u^*= 0.5$
- cavity height : $H_c^*= 0.5$
- Boundary conditions
- Inlet : Blasius' profile at $X_{in}^*= -0.5$. Boundary layer thickness $\delta^*= 8.75 \, 10^{-2}$
- Outlet : Orlansky's type at $X_{out}^*= 3.5$
- Wall conditions : floor and cavity walls
- Periodicity : lateral ends of the domain (spanwise direction)
- Symmetry plan : top of the domain
- Spatial resolution :
- Grid : $192 \times 128 \times 64$ per subdomain (1.572.864 cells over the domain)
- About cell-size
- $\Delta x_{min}^*= 1.0 \, 10^{-2} \quad \Delta x_{max}^*= 3.96 \,10^{-2}$ (downstream direction)
- $\Delta y_{min}^*= 7.5 \, 10^{-3} \quad \Delta y_{max}^*= 1.45 \,10^{-2}$ (normal direction)
- $\Delta z_{min}^*=\Delta z_{max}^*= 1.5625 \, 10^{-2}$ (spanwise direction)
Data Recording : information about data types
- Time series from probes
- Physical quantities : velocity components along x, y and z directions (u,v,w) and pressure (p)
- 11 probes
- Time step= 0.0525 time unit
- Time range : 25.02 to 259.96 time units
- Locations (In vertical mid-plan at $z=0.0$)
- Xi=0.2 , Xj= -0.3 , Xk= 0.0
- Xi=0.5 , Xj= -0.3 , Xk= 0.0
- Xi=0.8 , Xj= -0.3 , Xk= 0.0
- Xi=0.1 , Xj= 0.05 , Xk= 0.0
- Xi=0.5 , Xj= 0.05 , Xk= 0.0
- Xi=0.9 , Xj= 0.05 , Xk= 0.0
- Xi=1.0 , Xj= 0.05 , Xk= 0.0
- File name (per physical quantity) : x_ins_yyyyy.d with x= u,v,w,p and 'yyyyy' the MPI subdomain ID
- 3D snapshots
- Instantaneous fields : velocity components in x, y and z directions (U,V,W) and pressure (P)
- Recording rate : 0.25 time unit
- Time range from from 210.0 to 260.0 time units
- File name : res_xxxxx_yyyyyyy.d (xxxxx : MPI subdomain ID, yyyyyyy : Time ID)
- MPI subdomain ID: 0
- Time ID : from 39 to 239
- 2D slices
- Instantaneous fields : velocity components in x, y and z directions (U,V,W) and pressure (P)
- Recording rate : 0.05 time units
- Time range from from 210 to 260 time units
- File name : slice_n_idir_xxxxx_yyyyyyy.d (n : slice number ID, idir : normal orientation= 1: x(i), 2: y(j), 3: z(k), xxxxx : MPI subdomain ID, yyyyyyy : Time ID)
- MPI subdomain ID: 0
- Time ID : from 1 to 1001
- 8 slices
- slice ID : 1 - normal orientation : spanwise - location : $z=-3.390625 \,10^{-2}$
- slice ID : 2 - normal orientation : spanwise - location : $z=-2.234375 \,10^{-2}$
- slice ID : 3 - normal orientation : spanwise - location : $z=-7.8125 \,10^{-2}$
- slice ID : 4 - normal orientation : spanwise - location : $z=7.8125 \,10^{-2}$
- slice ID : 5 - normal orientation : spanwise - location : $z=2.234375 \,10^{-2}$
- slice ID : 6 - normal orientation : spanwise - location : $z=3.390625 \,10^{-2}$
- slice ID : 7 - normal orientation : normal - location : $y=-0.25$
- slice ID : 8 - normal orientation : normal - location : $y=0.03$
- Statistics
- fields : (i,j : indexes of direction x, y or z)
- Mean fields of velocity components (<Ui>) and pressure (<P>)
- Mean fields of quadratic quantities (<P2>, <UiUj>)
- Time average computation
- Time startup = 210.0 time units
- Time range per file = 50.0 time units
- Total time range from 180.0 to 510.0 time units
- file name : rst_xxxxx_yyyyyyy.d (xxxxx : MPI subdomain ID, yyyyyyy : Time ID)
- MPI subdomain ID : 0
- Time ID : 1
Database organisation
Data size : ~ 9.5 Gb
Main directory : /vol/DATABASE_MECA/DATABASE_CAVITY3D_R2_RE7826_PER1.0_DNS/NOFORCINGTERM
For more details about files, see the wiki doc of Sunfluidh
Directories & files
/GRID : contains all ASCII files about grid setup input data file : data_meshgen.d report on grid features : report_meshgen.d grid files for sunfluidh: maillx.d, mailly.d, maillz.d check files (ASCII) : check_mesh_I.d,check_mesh_J.d,check_mesh_K.d (3 columns : indices, cell-face coordinates, cell size) /DATASETUP : ASCII files input data file for sunfluidh : input3d.dat velocity profile (Blasius' boundary layer) at the inlet : inlet_velocity_profile.dat /TIMESERIES : contains time series recorded over the time range [200,513.3] ASCII files : x_ins_00000_full.d with x= u,v,w,p /SNAPSHOTS : snapshots binary files res_xxxxx_yyyyyyy.d /STATISTICS : statistics binary files files rst_xxxxx_yyyyyyy.d /RESTART_AR : backup/restart archive save.tar at 260.0 time units
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datasetmeca/cavityflow_1.1606150935.txt.gz · Dernière modification : 2020/11/23 18:02 de yann