Dynamique des Fluides (DynFluid): Recent submissions

Now showing items 288-294 of 297

    • A purely nonlinear route to transition approaching the edge of chaos in a boundary layer 
      Article dans une revue avec comité de lecture
      CHERUBINI, Stefania; DE PALMA, Pietro; BOTTARO, Alessandro; ccROBINET, Jean-Christophe (IOP Publishing, 2012)
      The understanding of transition in shear flows has recently progressed along new paradigms based on the central role of coherent flow structures and their nonlinear interactions. We follow such paradigms to identify, by ...
    • Optimal wave packets in a boundary layer and initial phases of a turbulent spot 
      Article dans une revue avec comité de lecture
      CHERUBINI, Stefania; BOTTARO, Alessandro; DE PALMA, Pietro; ccROBINET, Jean-Christophe (Cambridge University Press (CUP), 2010)
      The three-dimensional global optimal dynamics of a flat-plate boundary layer is studied by means of an adjoint-based optimization in a spatial domain of long – but finite – streamwise dimension. The localized optimal initial ...
    • Nonlinear optimal perturbations in a Couette flow: bursting and transition 
      Article dans une revue avec comité de lecture
      CHERUBINI, Stefania; DE PALMA, Pietro (Cambridge University Press (CUP), 2013)
      This paper provides the analysis of bursting and transition to turbulence in a Couette flow, based on the growth of nonlinear optimal disturbances. We use a global variational procedure to identify such optimal disturbances, ...
    • Instabilités bi-et tridimensionnelles dans une couche limite décollée compressible subsonique 
      Communication avec acte
      MERLE, Matthieu; EHRENSTEIN, Uwe; ccROBINET, Jean-Christophe (2013)
      Flow separation is a common feature in wall-bounded flow, where it is generally induced by an adverse pressure gradient. Here we reconsider a bump-type geometry which has been used in previous numerical investigations of ...
    • Airfoil Shape Optimization for Transonic Flows of Bethe–Zel’dovich–Thompson Fluids 
      Article dans une revue avec comité de lecture
      CONGEDO, Pietro; CORRE, Christophe; CINNELLA, Paola (American Institute of Aeronautics and Astronautics, 2007)
      High-performance airfoils for transonic flows of Bethe–Zel’dovich–Thompson fluids are constructed using a robust and efficient Euler flow solver coupled with a multi-objective genetic algorithm. Bethe–Zel’dovich– Thompson ...
    • The minimal seed of turbulent transition in the boundary layer 
      Article dans une revue avec comité de lecture
      CHERUBINI, Stefania; DE PALMA, Pietro; BOTTARO, Alessandro; ccROBINET, Jean-Christophe (Cambridge University Press (CUP), 2011)
      This paper describes a scenario of transition from laminar to turbulent flow in a spatially developing boundary layer over a flat plate. The base flow is the Blasius non-parallel flow solution; it is perturbed by optimal ...
    • Numerical investigation of dense gas flows through transcritical multistage axial Organic Rankine Cycle turbines 
      Communication avec acte
      CINNELLA, Paola; ccSCIACOVELLI, Luca (2013)
      Many recent studies suggest that supercritical Organic Rankine Cycles have a great potential for lowtemperature heat recovery applications, since they allow better recovery efficiency for a simplified cycle architecture. ...