Prédiction de la turbulence généré par des grilles multi-échelles inhomogènes pour produire une couche limite atmosphérique en soufflerie

Autor: Thomas, Huret, Christos, Vassilicos, Geoffrey, Tanguy, Laurent, Jacquin, Quentin, Gallas

Publikováno v: International Workshop on Physical Modeling of Flow and Dispersion Phenomena PHYSMOD 2022
International Workshop on Physical Modeling of Flow and Dispersion Phenomena PHYSMOD 2022, Aug 2022, Prague, Czech Republic

International audience; Wind tunnel generation of flows representative of the Atmospheric Boundary Layer (ABL) still requires trial-and-error based design process for both passive and active devices. To address this issue, a new type of passive grids

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______4254::5754e84a5ba0419e93474a52fb6f79af
https://hal.science/hal-03784831

A turbulence dissipation inhomogeneity scaling in the wake of two side-by-side square prisms

Autor: C. Cuvier, J.G. Chen, Jean-Marc Foucaut, John Christos Vassilicos, Yasar Ostovan

Publikováno v: Journal of Fluid Mechanics
Journal of Fluid Mechanics, Cambridge University Press (CUP), 2021, 924, pp.A4. ⟨10.1017/jfm.2021.599⟩
Journal of Fluid Mechanics, 2021, 924, pp.A4. ⟨10.1017/jfm.2021.599⟩

International audience; We experimentally study how the turbulent energy dissipation rate scales in the cross-stream direction of turbulent wake flows generated by two side-by-side square prisms. We consider three different such turbulent flows with

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b415d372c9896360953327450b1ebb8b
https://doi.org/10.1017/jfm.2021.599

The non-equilibrium dissipation scaling in large Reynolds number turbulence generated by rectangular fractal grids

Autor: Paul J. K. Bruce, Christophe Cuvier, John Christos Vassilicos, Shaokai Zheng, Jean-Marc Foucaut, J. M. R. Graham

Publikováno v: Physical Review Fluids
Physical Review Fluids, 2021

In this paper, the turbulence fields generated by a group of modified fractal grids, referred to as the rectangular fractal grids (RFGs), are documented and discussed. The experiments were carried out using hot-wire anemometry in three facilities at

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b01233b8c5a2dbf9123043a1e53a67ca
https://hal.archives-ouvertes.fr/hal-03217070/document

Nonequilibrium Scaling of the Turbulent-Nonturbulent Interface Speed in Planar Jets

Autor: J. Christos Vassilicos, Gioacchino Cafiero

Publikováno v: Physical Review Letters
Physical Review Letters, American Physical Society, 2020, 125 (17), ⟨10.1103/PhysRevLett.125.174501⟩
Physical Review Letters, 2020, 125 (17), ⟨10.1103/PhysRevLett.125.174501⟩

The length scale which, combined with the fluid's kinematic viscosity $\ensuremath{\nu}$, defines the local average speed of the turbulent-nonturbulent interface has been postulated to be the smallest (Kolmogorov) length scale $\ensuremath{\eta}$ of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81458594efc256c75d7e02adfcdda031
https://pubmed.ncbi.nlm.nih.gov/33156650

Formation of power-law scalings of spectra and multiscale coherent structures in the near-field of grid-generated turbulence

Autor: John Christos Vassilicos, Tatsuya Yasuda, Susumu Goto

Publikováno v: Physical Review Fluids
Physical Review Fluids, American Physical Society, 2020, 5 (1), ⟨10.1103/PhysRevFluids.5.014601⟩
Physical Review Fluids, 2020, 5 (1), ⟨10.1103/PhysRevFluids.5.014601⟩

International audience; We investigate the streamwise evolutions of energy and pressure spectra along the shear-layer region of very near-field grid-generated turbulence. The energy and pressure spectra evolve significantly in this near field. The sh

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a56051cfbdc99ee44138a412a6ca1c01
https://doi.org/10.1103/physrevfluids.5.014601