3D turbulent channel flow at $Re_{\tau}= 590$

Author : Y. Fraigneau CNRS-LIMSI (yann.fraigneau@limsi.fr)
Date : August 2020
Location : DATABASE_CHANNELFLOW_RETAU590_LES
Simulation type : LES, Mansour's model (Sunfluidh code)

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Simulation settings

Sketch

Referential : cartesian geometry

axes :

x(i) : downstream direction

y(j) : spanwise direction

z(k) : normal direction

origin :

: left down corner

: left down corner

: left down corner

Reference scales

Density : mass density of the fluid ()

Length : half height of the channel ()

Velocity : wall friction velocity ()

Dynamic viscosity : dynamic viscosity of the fluid ()

Reynolds number :

Non-dimensionalised data

velocity :

density :

coordinates : , ,

Computational domain

Domain scope

Downstream direction(x) :

Spanwise direction (y) :

Normal direction (z) :

Boundary conditions

Wall conditions : Top and low walls of the domain

Periodicity : lateral ends of the domain in and directions

Domain decomposition (128 MPI subdomains)

Along the downstream direction : 8

Along the normal direction : 4

Along the spanwise direction : 4

Spatial resolution :

Grid : per subdomain (16.777.216 cells over the domain)

About cell-size

(downstream direction)

(spanwise direction)

(normal 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)

9 probes

Time step= 0.001 time unit

Time range : 16.64 to 199.44 time units

Locations (In vertical plan at )

Xi= 1.00, Xj= 1.00 , Xk= 0.10 - MPI Subdomain ID : 20

Xi= 1.00, Xj= 1.00 , Xk= 0.25 - MPI Subdomain ID : 21

Xi= 1.00, Xj= 1.00 , Xk= 0.50 - MPI Subdomain ID : 21

Xi= 1.00, Xj= 1.00 , Xk= 0.75 - MPI Subdomain ID : 21

Xi= 1.00, Xj= 1.00 , Xk= 1.00 - MPI Subdomain ID : 21

Xi= 1.00, Xj= 1.00 , Xk= 1.25 - MPI Subdomain ID : 22

Xi= 1.00, Xj= 1.00 , Xk= 1.50 - MPI Subdomain ID : 22

Xi= 1.00, Xj= 1.00 , Xk= 1.75 - MPI Subdomain ID : 22

Xi= 1.00, Xj= 1.00 , Xk= 1.90 - MPI Subdomain ID : 23

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 : 0.01 time units

Time range from from 16.64 to 199.44

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

MPI subdomain ID: from 0 to 127

Time ID : from 9 to 18288

Statistics

fields : (i,j : indexes of direction x, y or z)

Mean fields of velocity components (<Ui>) and pressure (<P>)

Mean fields of square quantities (<P2>, <UiUj>)

Mean field of subgrid scale dynamic viscosity (mu_sg)

Mean field of square mu_sg (musg2)

Time average computation

Time startup = 20.0

Time range per file = 5.0

Total time range from 20.0 to 199.44

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

MPI subdomain ID : from 0 to 127

Time ID : from 1 to 35

Database organisation

Data size : ~ 5.1 To
Main directory : /vol/DATABASE_MECA/RESTRICTED_ACCESS/DATABASE_CHANNELFLOW_RETAU590_LES
For more details about files, see the 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
/TIMESERIES : contains time series recorded over the time range [16.64 ; 199.44]
ASCII files : x_ins_yyyyy.d with x= u,v,w,p
time series files are sliced in storage directories CAS-MPI200-n (n from 5 to 50)
/SNAPSHOTS : snapshots binary files res_xxxxx_yyyyyyy.d
files stored in archive files : res_yyyyyyy.tar for each time ID
/STATISTICS : statistics binary files files rst_xxxxx_yyyyyyy.d
files stored in archive files : res_z.tar , z is an ID number (from 1 to 35)
/RESTART_AR : backup/restart archive save.tar at time 199.44
/FROM_COMPUTATION : regroups some directories and files related to the simulation
directories : CAS-MPI128-n with n= 5 to 50 (from simulation 5 to 50)
each directory contains files checkcalc_00000.dat and checkdata_00000.dat

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