3D planar jet through oscillating bodies at $Re_{H}= 1000$
The motion of bodies is vertical and forced with a sinusoïdal function
Three different frequencies are considered
Author : Y. Fraigneau CNRS-LIMSI (yann.fraigneau@limsi.fr)
Date : April 2019
Simulation type : DNS (Sunfluidh code)
Location : DATABASE_JET_TROUGH_OSCILLATING_BODIES_DNS
Status : Free access
Data size : ~ 2.3 Gb
A video is available here
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Simulation settings
2D sketch
Referential : cartesian geometry
axes :
origin :
$x_0= 0$ : upstream edge of the oscillating bodies
$y_0= 0$ : lower horizontal wall of the duct
$z_0= 0$ : left vertical wall of the duct
Reference scales
Density : mass density of the fluid ($\rho_0$)
Length : duct height ($H$)
Pressure : pressure variation between inlet and outlet, respectively ($\Delta P_0= P_i-P_o$)
Velocity : velocity scale ($U_0=\sqrt{\frac{P_i-P_o}{\rho_0}}$)
Dynamic viscosity : dynamic viscosity of the fluid ($\mu_0$)
Body oscillation frequency : $f_0$ , $3$ frequencies are considered over the time range of the simulation ($f_0= 0.25 , f_0=0.50,f_0= 1.0 $)
Reynolds number : $Re_H= \frac{\rho_0.U_0.H}{\mu_0}= 1000$
Strouhal number : $St_0=\frac{H.f_0}{U_i}$
Non-dimensionalised data
velocity : $U^*=\frac{U}{U_0}$
pressure : $P^*=\frac{P}{\Delta P_0}$
density : $\rho^*= \rho/\rho_0= 1$
coordinates : $x*=\frac{x}{H}$, $y^*=\frac{y}{H}$ , $z^*\frac{z}{H}$
Computational domain
Domain scope
Duct
Downstream direction(x) : $L^*= 6.0$ (upward duct $L_u= 1$, downward duct $L_d=4.5$)
Normal direction (y) : $H^*= 1.0$
Spanwise direction (z) : $l^*= 1.0$
Oscillating bodies (couple of parallelepiped bodies oscillating vertically in opposite phase)
Upstream edge position : $x_1=x_2= 0.0$
length (x): $L_b= 0.5$
height (y): Body's heights vary in regard to time $t$ in such a way the clearance $h_c$ between bodies evolves as $h_c= h_m*\sin(2\pi.f_0.t)$
width (z) : $l_z=1.0$
bodies are modeled with a pseudo-penalisation method (Pasquetti et al., Applied Numerical Mathematics, 2008)
Boundary conditions
Inlet : imposed pressure condition ($P_i=1$)
Outlet : imposed pressure condition ($P_o=0$)
Wall conditions : usual no-slip conditions on walls
Spatial resolution
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Data features
3D snapshots
Instantaneous fields : velocity components in x, y and z directions (U,V,W), the pressure (P) and the phase function related to the body motions (TRACE)
Recording rate : 0.05 time unit
Time range from from 0.0 to 100.0 time units
File name : res_xxxxx_yyyyyyy.d
MPI subdomain ID: 0
Time ID : from 1 to 2000
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Database organisation
Data size : ~ 2.3 Gb
Main directory : /vol/DATABASE_MECA/DATABASE_JET_TROUGH_OSCILLATING_BODIES_DNS
For more details about files, see the wiki doc of Sunfluidh
Directories & files
/DATASETUP : ASCII files
input data file for sunfluidh : input3d.dat
/SNAPSHOTS : snapshots binary files res_xxxxx_yyyyyyy.d
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