Self-excited primary and secondary instability of laminar separation bubbles

D Rodriguez, EM Gennaro, LF Souza - Journal of Fluid Mechanics, 2021 - cambridge.org
The self-excited instabilities acting on laminar separation bubbles in the absence of external
forcing are studied by means of linear stability analysis and direct numerical simulation …

Global stability analysis and direct numerical simulation of boundary layers with an isolated roughness element

R Ma, K Mahesh - Journal of Fluid Mechanics, 2022 - cambridge.org
Global stability analysis and direct numerical simulation of boundary layers with an isolated
roughness element Page 1 J. Fluid Mech. (2022), vol. 949, A12, doi:10.1017/jfm.2022.749 Global …

Low-order modelling of wake meandering behind turbines

V Gupta, M Wan - Journal of Fluid Mechanics, 2019 - cambridge.org
Based on recent numerical simulations and field experiments, the mechanism behind wake
meandering is increasingly accepted to be through the amplification of upstream …

Influence of freestream turbulence on the flow over a wall roughness

MA Bucci, S Cherubini, JC Loiseau, JC Robinet - Physical Review Fluids, 2021 - APS
The effect of freestream turbulence on the dynamics of an incompressible flow past a
cylindrical roughness element in subcritical conditions (ie, for Reynolds numbers below the …

Impinging planar jets: hysteretic behaviour and origin of the self-sustained oscillations

A Bongarzone, A Bertsch, P Renaud… - Journal of Fluid …, 2021 - cambridge.org
The experimental and numerical investigation presented by Bertsch et al.(Phys. Rev. Fluids,
vol. 5, 2020a, p. 054202) describes the self-sustained oscillations induced by the interaction …

Acoustic modes in jet and wake stability

E Martini, AVG Cavalieri, P Jordan - Journal of fluid mechanics, 2019 - cambridge.org
Motivated by recent studies that have revealed the existence of trapped acoustic waves in
subsonic jets (Towne et al., J. Fluid Mech., vol. 825, 2017, pp. 1113–1152), we undertake a …

Linear stability analysis of fluid–structure interaction problems with an immersed boundary method

A Tirri, A Nitti, J Sierra-Ausin, F Giannetti… - Journal of Fluids and …, 2023 - Elsevier
In this work, we present a novel approach to perform the linear stability analysis of fluid–
structure interaction problems. The underlying idea is the combination of a validated …

Optimal explicit Runge-Kutta methods for compressible Navier-Stokes equations

V Citro, F Giannetti, J Sierra - Applied Numerical Mathematics, 2020 - Elsevier
We focus our attention on the numerical simulations of compressible flows obtained by using
Finite Difference in time/Finite Element in space approximation. In particular, we determine …

Global linear stability analysis of the flow inside a conical draft tube

R Mitruţ, DM Bucur, G Dunca… - IOP Conference Series …, 2022 - iopscience.iop.org
The paper presents the numerical simulations of the flow inside the draft tube of Francis-99
turbine at the part load (PL) operating condition. The rotating vortex rope (RVR) is a …

An accurate RANS-based transition prediction approach (part II)

S Russo, N Natale, V Citro… - IOP Conference Series …, 2022 - iopscience.iop.org
We present a CFD analysis of a wind tunnel model of the new laminar turbo-prop aircraft
designed in the frame of the European Clean Sky 2 programme. The work presents the …