datasetmeca:flow2dpastheadtedcylinder1
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Table des matières
2D flow around a heated square-cylinder - $Re_{h}= 50$, $Ra= 5\; 10^6$
A heated square-cylinder is placed in a channel flow
Author : Y. Fraigneau CNRS-LIMSI (yann.fraigneau@limsi.fr)
Date : June 2019
Simulation type : DNS (Sunfluidh code)
Location : /DATABASE_2DFLOW_AROUND_HEATED_SQUARECYLINDER_DNS
Status : Free access
Data size : ~ 3 Gb
Simulation settings
2D sketch
Referential : cartesian geometry
- axes :
- x(i) : downstream direction
- y(j) : normal direction
- origin : lower left corner of the computational domain
- $x_0= 10h$
- $y_0= -6h$
Reference scales
- Density : mass density of the fluid ($\rho_0$)
- Lengths : cylinder size ($h$) and $H_u= 10h$ the distance between the domain's top and the square-cylinder's top.
- Velocity : velocity at inlet ($U_0$)
- Dynamic viscosity : dynamic viscosity of the fluid ($\mu_0$)
- thermal diffusivity : ($\kappa_0$)
- Reynolds number : $Re_H= \frac{\rho_0.U_0.h}{\mu_0}= 50$
- Rayleigh number : $Ra= \frac{\rho_0.\beta.g\Delta T.H_u^3}{\mu_0 \kappa_0}= 5\;10^6$
Non-dimensionalised data
- velocity : $U^*=\frac{U}{U_0}$
- density : $\rho^*= \rho/\rho_0= 1$
- coordinates : $x*=\frac{x}{h}$, $y^*=\frac{y}{h}$
- temperature : $T^*=\frac{T-T_c}{T_h-T_c}$ ($T_h$ and $T_w$ are respectively the temperature imposed at the cylender's walls and the temperature at the inlet and channel's walls)
Computational domain
- Domain scope
- computational domain size (channel flow)
- Downstream direction(x) : $L_x^*= 50.0$ (upward part $L_u= -10$, downward part $L_d=40$)
- Normal direction (y) : $L_y^*= 20.0$
- heated square cylinder
- size: $h^*= 1$
- temperature T_h^*= 1
- Boundary conditions
- Inlet : imposed pressure uniform velocity ($U_0=1$)
- Outlet : Orlansky type
- Bottom and top conditions : walls at (T_c^*=0)
- Spatial resolution
- mesh size : $512 \times 256 $ (131.072 cells)
- About cell-size
- $\Delta x*$ : from $0.03125$ to $0.723$ (downstream direction)
- $\Delta y*$ : from $0.03125$ to $0.187$ (normal direction)
Data features
- Time series
- from probes
- Physical quantities : velocity components along x and y directions (u,v) and pressure (p)
- 1 probe
- Time step= $2 \,10^{-2}$ time unit
- Time range : 400 to 600 time units
- Location : Xi= 3.5 , Xj=0.0
- File name (per physical quantity): x_ins_00000.d with x= u,v,p
- about cylinder motion
- center position as a function of time (ASCII file ibm_position01.dat)
- cylinder velocity as a function of time (ASCII file ibm_velocity01.dat)
- global force components applied to the cylinder (ASCII file ibm_force01.dat)
- force contributions exerted on the moving cylinder (ASCII file ibm_force_contribution01.dat, the four last columns can be ignored)
- 3D snapshots
- Instantaneous fields : velocity components in x, y and z directions (U,V), the pressure (P) and the phase function related to the body motion (TRACE)
- Recording rate : 0.4 time unit
- Time range from from 200.0 to 600.0 time units
- File name : res_xxxxx_yyyyyyy.d
- MPI subdomain ID: 0
- Time ID : from 3 to 502
Database organisation
Data size : ~ 7 Gb
Main directory : /vol/DATABASE_MECA/DATABASE_2DFLOW_AROUND_OSCILLATING_CYLINDER_DNS
For more details about files, see the wiki doc of Sunfluidh
Intermediate directories (four cases of study)
- $St= 0.95$ and $A= 0.2$ - directory : CAS_F0.95_A0.2
- $St= 0.95$ and $A= 0.5$ - directory : CAS_F0.95_A0.5
- $St= 1.20$ and $A= 0.2$ - directory : CAS_F1.2_A0.2
- $St= 1.20$ and $A= 0.5$ - directory : CAS_F1.2_A0.5
Endpoint directories & files
/DATASETUP : ASCII files input data file for sunfluidh : input3d.dat /GRID : ASCII files input data file : data_meshgen.d grid files for sunfluidh: maillx.d, mailly.d, maillz.d /SNAPSHOTS : snapshots binary files res_xxxxx_yyyyyyy.d /TIMESERIES : ASCII files u_ins_00000.d , v_ins_00000.d and p_ins_00000.d (timeseries of the velocity components and pressure from probe) ibm_position01.dat, ibm_velocity01.dat (about cylinder motion) ibm_force01.dat, ibm_force_contribution01.dat (about forces exerted on the cylinder)
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datasetmeca/flow2dpastheadtedcylinder1.1639567005.txt.gz · Dernière modification : 2021/12/15 12:16 de yann