179 citations · 993 across the 39 of their papers we have counts for
41 papers
Mechanisms of transonic buffet over supercritical airfoils revealed by direct numerical simulations
Giulio Soldati, Hang Song, Sergio Pirozzoli +1
We use direct numerical simulations to study the turbulent transonic flow over a supercritical airfoil, spanning the transition from stable conditions to fully developed buffet at…
Scaling patch analysis of turbulent kinetic energy budget equation in wall-bounded flows
Tie Wei, Zhaorui Li, Sergio Pirozzoli
The scaling patch approach is applied to analyze the turbulent kinetic energy (TKE) budget equation in wall-bounded turbulent flows. The balance of the TKE equation is divided into…
A Chimera method for high-fidelity simulation of turbulent flows
Andrea Di Mascio, Sergio Pirozzoli
We develop a block-structured solver for high-fidelity simulation of flows in complex geometries, based on overlapping (Chimera) meshes. The key components of the algorithm are a b…
The aerodynamic performance of a transonic airfoil with spanwise forcing
Niccolò Berizzi, Davide Gatti, Giulio Soldati +2
Spanwise wall forcing in the form of streamwise-travelling waves is applied to the suction side of a transonic airfoil with a shock wave to reduce aerodynamic drag. The study, cond…
Simulation and modelling of convective mixing of carbon dioxide in geological formations
Marco De Paoli, Francesco Zonta, Lea Enzenberger +2
We perform large-scale numerical simulations of convection in 3D porous media at Rayleigh-Darcy numbers up to . To investigate the convective mixing of carbon dioxi…
Air entrainment and gas transfer processes in wave breaking events
Simone Di Giorgio, Sergio Pirozzoli, Alessandro Iafrati
We investigate gas transfer processes occurring at the air-water interface of progressive water waves using high-fidelity numerical simulations. Waves with varying initial steepnes…
CaLES: A GPU-accelerated solver for large-eddy simulation of wall-bounded flows
Maochao Xiao, Alessandro Ceci, Pedro Costa +2
We introduce CaLES, a GPU-accelerated finite-difference solver designed for large-eddy simulations (LES) of incompressible wall-bounded flows in massively parallel environments. Bu…
Reynolds number effects on turbulent flow in curved channels
Giulio Soldati, Paolo Orlandi, Sergio Pirozzoli
In this work, we study the flow in curved channels, an archetypal configuration that allows insights into problems featuring turbulence bounded by curved walls. Besides its relevan…
Turbulent skin-friction drag reduction via spanwise forcing at high Reynolds number
Davide Gatti, Maurizio Quadrio, Alessandro Chiarini +2
We address the Reynolds-number dependence of the turbulent skin-friction drag reduction induced by streamwise-travelling waves of spanwise wall oscillations. The study relies on di…
Direct numerical simulation of drag reduction in rotating pipe flow up to
Maochao Xiao, Alessandro Ceci, Paolo Orlandi +1
Direct numerical simulations (DNS) of rotating pipe flows up to are carried out to investigate drag reduction effects associated with axial rotation, extending…
On the streamwise velocity variance in the near-wall region of turbulent flows
Sergio Pirozzoli
We study the behaviour of the streamwise velocity variance in turbulent wall-bounded flows using a DNS database of pipe flow up to . The analysis of the spanwis…
Intrinsic compressibility effects in near-wall turbulence
Asif Manzoor Hasan, Pedro Costa, Johan Larsson +2
The impact of intrinsic compressibility effects -- changes in fluid volume due to pressure variations -- on high-speed wall-bounded turbulence has often been overlooked or incorrec…
Friction and heat transfer in forced air convection with variable physical properties
Davide Modesti, Sergio Pirozzoli
We establish a theoretical framework for predicting friction and heat transfer coefficients in variable-properties forced air convection. Drawing from concepts in high-speed wall t…
Mean temperature profiles in turbulent internal flows
Sergio Pirozzoli, Davide Modesti
We derive explicit formulas for the mean profiles of temperature (modeled as a passive scalar) in forced turbulent convection, as a function of the Reynolds and Prandtl numbers. Th…
Estimating mean profiles and fluxes in high-speed turbulent boundary layers using inner/outer-layer transformations
Asif Manzoor Hasan, Johan Larsson, Sergio Pirozzoli +1
Accurately predicting drag and heat transfer for compressible high-speed flows is of utmost importance for a range of engineering applications. This requires the precise knowledge…
Incorporating intrinsic compressibility effects in velocity transformations for wall-bounded turbulent flows
Asif Manzoor Hasan, Johan Larsson, Sergio Pirozzoli +1
A transformation that relates a compressible wall-bounded turbulent flow with non-uniform fluid properties to an equivalent incompressible flow with uniform fluid properties is der…
High-speed turbulent flows towards the exascale: STREAmS-2 porting and performance
Srikanth Sathyanarayana, Matteo Bernardini, Davide Modesti +2
Exascale High Performance Computing (HPC) represents a tremendous opportunity to push the boundaries of Computational Fluid Dynamics (CFD), but despite the consolidated trend towar…
Drag reduction on a transonic airfoil
Maurizio Quadrio, Alessandro Chiarini, Jacopo Banchetti +3
Flow control for turbulent skin-friction drag reduction is applied to a transonic airfoil to improve its aerodynamic performance. The study is based on direct numerical simulations…
Direct numerical simulation of forced thermal convection in square ducts up to
Davide Modesti, Sergio Pirozzoli
We carry out direct numerical simulation (DNS) of flow in a turbulent square duct by focusing on heat transfer effects, considering the case of unit Prandtl number. Reynolds number…
Reynolds stress scaling in the near-wall region of wall-bounded flows
Alexander J. Smits, Marcus Hultmark, Myoungkyu Lee +2
A new scaling is derived that yields a Reynolds number independent profile for all components of the Reynolds stress in the near-wall region of wall bounded flows, including channe…
Natural grid stretching for DNS of wall-bounded flows
Sergio Pirozzoli, Paolo Orlandi
We propose a natural stretching function for DNS of wall-bounded flows, which blends uniform near-wall spacing with uniform resolution in terms of Kolmogorov units in the outer wal…
Reynolds stress scaling in the near-wall region
Alexander J. Smits, Marcus Hultmark
A new scaling is derived that yields a Reynolds number independent profile for all components of the Reynolds stress in the near-wall region of wall bounded flows. The scaling demo…
Scaling turbulence in the near-wall region
Marcus Hultmark, Alexander J. Smits
A new velocity scale is derived that yields a Reynolds number independent profile for the streamwise turbulent fluctuations in the near-wall region of wall bounded flows for $y^+<2…
One-point statistics for turbulent pipe flow up to
Sergio Pirozzoli, Joshua Romero, Massimiliano Fatica +2
We study turbulent flows in a smooth straight pipe of circular cross--section up to using direct--numerical-simulation (DNS) of the Navier--Stokes equations. Th…