56 citations · 242 across the 15 of their papers we have counts for
15 papers
Direct numerical simulation of transition under free-stream turbulence and the influence of large integral length scales
Kristina Đurović, Ardeshir Hanifi, Philipp Schlatter +2
Under action of free-stream turbulence (FST), elongated streamwise streaky structures are generated inside the boundary layer, and their amplitude and wavelength are crucial for th…
Linear and nonlinear receptivity mechanisms in boundary layers subject to free-stream turbulence
Diego C. P. Blanco, Ardeshir Hanifi, Dan S. Henningson +1
Large-eddy simulations of a flat-plate boundary layer, without a leading edge, subject to multiple levels of incoming free stream turbulence are considered in the present work. Wit…
On the Low-Frequency Dynamics of Turbulent Separation Bubbles
C. Cura, A. Hanifi, A. V. G. Cavalieri +1
The low-frequency modal and non-modal stability characteristics of an incompressible, pressure-gradient-induced turbulent separation bubble (TSB) are investigated with the objectiv…
Numerical investigation of the boundary layer stability on a section of a rotating wind turbine blade
Thales Coelho Leite Fava, Dan Henningson, Ardeshir Hanifi
Laminar-turbulent transition on a rotating wind turbine blade at a chord Reynolds number of and varying angles of attack () is studied with direct numerical si…
Simulating Airplane Aerodynamics with Body Forces: Actuator Line Method for Non-planar Wings
Vitor G. Kleine, Ardeshir Hanifi, Dan S. Henningson
Two configurations typical of fixed-wing aircraft are simulated with the actuator line method (ALM): a wing with winglets and a T-tail. The ALM is extensively used in rotor simulat…
Non-iterative vortex-based smearing correction for the actuator line method
Vitor G. Kleine, Ardeshir Hanifi, Dan S. Henningson
The actuator line method (ALM) is extensively used in wind turbine and rotor simulations. However, its original uncorrected formulation overestimates the forces near the tip of the…
Stability of Two-dimensional Potential Flows Using Bicomplex Numbers
Vitor G. Kleine, Ardeshir Hanifi, Dan S. Henningson
The use of the complex velocity potential and the complex velocity is widely disseminated in the study of two-dimensional incompressible potential flows. The advantages of working…
The Stability of Wakes of Floating Wind Turbines
Vitor G. Kleine, Lucas Franceschini, Bruno S. Carmo +2
Floating offshore wind turbines (FOWTs) are subjected to platform motion induced by wind and wave loads. The oscillatory movement trigger vortex instabilities, modifying the wake s…
Global stability of rigid-body-motion fluid-structure-interaction problems
Prabal S. Negi, Ardeshir Hanifi, Dan S. Henningson
A rigorous derivation and validation for linear fluid-structure-interaction (FSI) equations for a rigid-body-motion problem is performed in an Eulerian framework. We show that the…
Unsteady aerodynamic effects in small-amplitude pitch oscillations of an airfoil
Prabal S. Negi, Ricardo Vinuesa, Ardeshir Hanifi +2
High-fidelity wall-resolved large-eddy simulations (LES) are utilized to investigate the flow-physics of small-amplitude pitch oscillations of an airfoil at Re = 100,000. The inves…
Turbulent boundary layers around wing sections up to Rec = 1,000,000
R. Vinuesa, P. S. Negi, M. Atzori +3
Reynolds-number effects in the adverse-pressure-gradient (APG) turbulent boundary layer (TBL) developing on the suction side of a NACA4412 wing section are assessed in the present…
A realizable data-driven approach to delay bypass transition with control theory
Pierluigi Morra, Kenzo Sasaki, Ardeshir Hanifi +2
The current work presents a realizable method to control streaky disturbances in boundary layer flows and delay transition to turbulence via active flow control. Numerical simulati…
On the role of actuation for the control of streaky structures in boundary layers
Kenzo Sasaki, Pierluigi Morra, André V G. Cavalieri +2
This work deals with the closed-loop control of streaky structures induced by free-stream turbulence in a zero-pressure gradient, transitional boundary layer, by means of localized…
Assessment of turbulent boundary layers on a NACA4412 wing section at moderate Re
R. Vinuesa, S. M. Hosseini, A. Hanifi +2
The results of a DNS of the flow around a wing section represented by a NACA4412 profile, with Rec = 400, 000 and 5 degree angle of attack, are presented in this study. The high-or…
Reynolds-number effects in turbulent boundary layers around wing sections
Ricardo Vinuesa, Prabal Negi, Marco Atzori +3
Four well-resolved LESs of the turbulent boundary layers around a NACA4412 wing section, with Rec ranging from 100,000 to 1,000,000, were performed at 5 degree angle of attack. By…