Dynamique des Fluides (DynFluid): Recent submissions

Now showing items 211-217 of 295

    • Convergence of Fourier-based time methods for turbomachinery wake passing problems 
      Article dans une revue avec comité de lecture
      GOMAR, Adrien; BOUVY, Quentin; SICOT, Frédéric; DUFOUR, Guillaume; CINNELLA, Paola; FRANCOIS, Benjamin (Elsevier, 2014)
      The convergence of Fourier-based time methods applied to turbomachinery flows is assessed. The focus is on the harmonic balance method, which is a timedomain Fourier-based approach standing as an efficient alternative to ...
    • Bayesian estimates of parameter variability in the k − ε turbulence model 
      Article dans une revue avec comité de lecture
      EDELING, Wouter Nico; CINNELLA, Paola; DWIGHT, Richard P.; BIJL, H. (Elsevier, 2014)
      In this paper we are concerned with obtaining estimates for the error in Reynolds-Averaged Navier-Stokes (RANS) simulations based on the Launder-Sharma k−ε turbulence closure model, for a limited class of flows. In particular ...
    • Predictive RANS simulations via Bayesian Model-Scenario Averaging 
      Article dans une revue avec comité de lecture
      CINNELLA, Paola (Elsevier, 2014)
      The turbulence closure model is the dominant source of error in most Reynolds-Averaged Navier–Stokes simulations, yet no reliable estimators for this error component currently exist. Here we develop a stochastic, a posteriori ...
    • Hairpin-like optimal perturbations in plane Poiseuille flow 
      Article dans une revue avec comité de lecture
      FARANO, Mirko; CHERUBINI, Stefania; DE PALMA, Pietro; ccROBINET, Jean-Christophe (Cambridge University Press (CUP), 2015)
      In this work it is shown that hairpin vortex structures can be the outcome of a nonlinear optimal growth process, in a similar way as streaky structures can be the result of a linear optimal growth mechanism. With this ...
    • Critical evaluation of three hemodynamic models for the numerical simulation of intra-stent flows 
      Article dans une revue avec comité de lecture
      CHABI, Fatiha; ccCHAMPMARTIN, Stephane; ccSARRAF, Christophe; NOGUERA, Ricardo (Elsevier, 2015)
      We evaluate here three hemodynamic models used for the numerical simulation of bare and stented artery flows. We focus on two flow features responsible for intra-stent restenosis: the wall shear stress and the re-circulation ...
    • Performance gains provided by the use of a counter-rotating axial-flow fan with respect to a conventional rotor-stator stage 
      Article dans une revue avec comité de lecture
      WANG, Juan; ccRAVELET, Florent; ccBAKIR, Farid (Ethan Publishing Company, USA, 2015)
      The adoption of counter-rotating stages for propellers, axial-flow pumps and low-speed fans has opened a way to design high performance and compact turbomachines in various industrial domains, leading to potentially high ...
    • Minimal-energy perturbations rapidly approaching the edge state in Couette flow 
      Article dans une revue avec comité de lecture
      CHERUBINI, Stefania; DE PALMA, Pietro (Cambridge University Press (CUP), 2015)
      Transition to turbulence in shear flows is often subcritical, thus the dynamics of the flow strongly depends on the shape and amplitude of the perturbation of the laminar state. In the state space, initial perturbations ...