Experimental Study of Temporal and Spatial Structures in Fence-On-Wall Testcase

Extending the bounds of ‘steady’ RANS closures: Toward an instability-sensitive Reynolds stress model

“…16 and 20). Afterwards the natural decay of the homogeneous isotropic turbulence (DNS by Jimenez et al, see Tavoularis et al, 1997), flow over a backward-facing step (experimental and DNS reference results by Jovic and Driver (1995) and Le et al (1997) are available), flow impingement onto a wallmounted fence followed by a highly-curved separated shear layer reattaching at a longer distance (experimental data are provided by Larsen et al (1999)) and finally flow in a 3D diffuser (Exp. : Cherry et al, 2008) characterized by a three-dimensional boundary layer separation in a corner between two expanding walls are computed.…”

“…7 and 25. The reference database is provided experimentally by Larsen et al (1999). The fence-height-based Reynolds number corresponds to Re H = 3000 and the Reynolds number based on the channel height equals to Re (7.5H) = 22,500.…”

“…The feasibility of this grid-spacing-free model, coping inherently with the grid anisotropy, is checked by computing series of attached and separating flow configurations including a plane channel flow (reference Direct Numerical Simulation is from Moser et al (1999)), flow over a backward-facing step (reference experiment is by Jovic and Driver (1995) and DNS is by Le et al (1997)), flow over a wall-mounted fence (experimental investigation is by Larsen et al (1999)), flow over a periodical arrangement of axisymmetric, continuously-curved 2D hills (reference LES simulations are by Fröhlich et al (2005) and Breuer et al (2009)) and flow in a 3D diffuser (reference experiment is provided by Cherry et al (2008) and DNS by Ohlsson et al (2010)). The natural decay of the homogeneous isotropic turbulence in accordance with the DNS of Jimenez (see Tavoularis et al, 1997) is also computed in the course of the model development.…”