3D shear-layer driven cavity flow at $Re_{L_c}= 7826$

Author : Y. Fraigneau CNRS-LIMSI (yann.fraigneau@lisn.fr)
Date : July 2020
Simulation type : DNS (Sunfluidh code)
Location : DATABASE_CAVITY3D_R2_RE7826_PER1.0_DNS/NOFORCINGTERM
Status : Free access
Data size : ~ 31 Gb

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Simulation settings

2D sketch

Referential : cartesian geometry

axes :

x(i) : downstream direction

y(j) : normal direction

z(k) : spanwise direction

origin :

: upstream edge of the cavity

: upstream edge of the cavity

: upstream edge of the cavity, at the mid-span location

Reference scales

Density : mass density of the fluid ()

Length : cavity length ()

Velocity : inlet bulk velocity ()

Dynamic viscosity : dynamic viscosity of the fluid ()

Reynolds number :

Non-dimensionalised data

velocity :

density :

coordinates : , ,

Computational domain

Domain scope

Downstream direction(x) :

Normal direction (y) :

Spanwise direction (z) :

upstream vein length :

cavity height :

Boundary conditions

Inlet : Blasius' profile at . Boundary layer thickness

Outlet : Orlansky's type at

Wall conditions : floor and cavity walls

Periodicity : lateral ends of the domain (spanwise direction)

Symmetry plan : top of the domain

Spatial resolution :

Grid : per subdomain (1.572.864 cells over the domain)

About cell-size

(downstream direction)

(normal direction)

(spanwise direction)

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Data features

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 : 200 to 400 time units

Locations (In vertical mid-plan at )

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 400.0 time units

File name : res_xxxxx_yyyyyyy.d (xxxxx : MPI subdomain ID, yyyyyyy : Time ID)

MPI subdomain ID: 0

Time ID : from 1 to 760

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 400 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 3801

8 slices

slice ID : 1 - normal orientation : spanwise - location :

slice ID : 2 - normal orientation : spanwise - location :

slice ID : 3 - normal orientation : spanwise - location :

slice ID : 4 - normal orientation : spanwise - location :

slice ID : 5 - normal orientation : spanwise - location :

slice ID : 6 - normal orientation : spanwise - location :

slice ID : 7 - normal orientation : normal - location :

slice ID : 8 - normal orientation : normal - location :

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 = 200.0 time units

Time range per file = 50.0 time units

Total time range from 200.0 to 400.0 time units

file name : rst_xxxxx_yyyyyyy.d (xxxxx : MPI subdomain ID, yyyyyyy : Time ID)

MPI subdomain ID : 0

Time ID : 1 to 4

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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.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_t400.tar for time= 400 time units

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