Výsledky vyhledávání - "Bastien Di Pierro"

Restricted optimal paths to transition in a plane Couette flow

Autor: Bastien Di Pierro, Anne Cadiou, Lionel Le Penven, Frédéric Alizard, Marc Buffat

Publikováno v: European Journal of Mechanics-B/Fluids
European Journal of Mechanics-B/Fluids, Elsevier, 2021, 85, pp.261-275. ⟨10.1016/j.euromechflu.2020.10.004⟩

International audience; To identify laminar/turbulent transition paths in plane Couette flow, a varia-tional formulation incorporating a restricted nonlinear (RNL) system that retains a single streamwise Fourier mode, is used. Considering the flow ge

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e6e71184d60c72f34fbba35c9ccc687
https://hal.archives-ouvertes.fr/hal-02972434/file/article_RNL_OPT.pdf

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A projection method for the spectral solution of non-homogeneous and incompressible Navier-Stokes equations

Autor: Bastien Di Pierro, Malek Abid

Publikováno v: International Journal for Numerical Methods in Fluids. 71:1029-1054

This paper is devoted to the development of a parallel, spectral and second-order time-accurate method for solving the incompressible and variable density Navier–Stokes equations. The method is well suited for finite thickness density layers and is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::96cbb25d77f26655fa671c56aa40ec41
https://doi.org/10.1002/fld.3700

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Experimental and numerical investigation of a variable density swirling-jet stability

Autor: Muriel Amielh, Malek Abid, Bastien Di Pierro

Publikováno v: Physics of Fluids
Physics of Fluids, American Institute of Physics, 2013, 25 (8), pp.104-1,104-17. ⟨10.1063/1.4817070⟩
Physics of Fluids, 2013, 25 (8), pp.104-1,104-17. ⟨10.1063/1.4817070⟩

International audience; Linear stability of a variable density, and incompressible, swirling jet is studied at moderate Reynolds numbers, both experimentally and numerically. Mean flow characteristics are obtained experimentally. They show a correlat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::299558bb47b7427435be2fe6a5dc902e
https://hal.archives-ouvertes.fr/hal-00948109

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Spatiotemporal instability of a variable-density Batchelor vortex

Autor: Malek Abid, Bastien Di Pierro

Publikováno v: Journal of Fluid Mechanics
Journal of Fluid Mechanics, Cambridge University Press (CUP), 2012, 703, pp.49-59. ⟨10.1017/jfm.2012.185⟩
Journal of Fluid Mechanics, 2012, 703, pp.49-59. ⟨10.1017/jfm.2012.185⟩

Linear and nonlinear impulse responses are computed, using three-dimensional numerical simulations, for an incompressible and variable density (inhomogeneous) Batchelor vortex at a moderately high Reynolds number, $\mathit{Re}= 667$. In the linear fr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34cfc054d63316f3bca31af09d87481f
https://hal.archives-ouvertes.fr/hal-00701223

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Instabilities of variable-density swirling flows

Autor: Malek Abid, Bastien Di Pierro

Publikováno v: Physical Review E : Statistical, Nonlinear, and Soft Matter Physics
Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, American Physical Society, 2010, pp.046312. ⟨10.1103/PhysRevE.82.046312⟩
Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2010, pp.046312. ⟨10.1103/PhysRevE.82.046312⟩

Inviscid swirling flows are modeled, for analytical studies, using axisymmetric azimuthal, V(r), and axial, W(r), velocity profiles (r is the distance from the axis). The asymptotic analysis procedure (large wave numbers, k axial and m azimuthal) dev

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8175f3819553ee0a578a69eff39b4659
https://hal.archives-ouvertes.fr/hal-00530014

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