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 :

x(i) : downstream direction

y(j) : normal direction

z(k) : spanwise direction

origin :

: upstream edge of the oscillating bodies

: lower horizontal wall of the duct

: left vertical wall of the duct

Reference scales

Density : mass density of the fluid ()

Length : duct height ()

Pressure : pressure variation between inlet and outlet, respectively ()

Velocity : velocity scale ()

Dynamic viscosity : dynamic viscosity of the fluid ()

Body oscillation frequency : , frequencies are considered over the time range of the simulation ()

Reynolds number :

Strouhal number :

Non-dimensionalised data

velocity :

pressure :

density :

coordinates : , ,

Computational domain

Domain scope

Duct

Downstream direction(x) : (upward duct , downward duct )

Normal direction (y) :

Spanwise direction (z) :

Oscillating bodies (couple of parallelepiped bodies oscillating vertically in opposite phase)

Upstream edge position :

length (x):

height (y): Body's heights vary in regard to time in such a way the clearance between bodies evolves as

width (z) :

bodies are modeled with a pseudo-penalisation method (Pasquetti et al., Applied Numerical Mathematics, 2008)

Boundary conditions

Inlet : imposed pressure condition ()

Outlet : imposed pressure condition ()

Wall conditions : usual no-slip conditions on walls

Spatial resolution

Regular grid : (576.000 cells)

About cell-size

(downstream direction)

(normal direction)

(spanwise direction)

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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

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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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