datasetmeca:jetoscillatingbodies
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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
Three different frequencies are considered
Author : Y. Fraigneau CNRS-LIMSI (yann.fraigneau@limsi.fr)
Date : April 2019
Location : DATABASE_JET_TROUGH_OSCILLATING_BODIES_DNS
Simulation type : DNS (Sunfluidh code)
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 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
- Regular grid : $180 \times 80 \times 40$ (576.000 cells)
- About cell-size
- $\Delta x*= 0.0333$ (downstream direction)
- $\Delta y*= 0.0125$ (normal direction)
- $\Delta z*=0.0250$ (spanwise direction)
Data Recording : information about data types
- 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
Database organisation
Data size : ~ 2.3 Go
Main directory : /vol/DATABASE_MECA/DATABASE_JET_TROUGH_OSCILLATING_BODIES_DNS
For more details about files, see the 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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datasetmeca/jetoscillatingbodies.1605786707.txt.gz · Dernière modification : 2020/11/19 12:51 de yann