Preconditioned boundary-implicit subiterative DDADI method for accuracy and efficiency enhancement in low-Mach number flows

F Liao, Y Jin - Computers & Fluids, 2023 - Elsevier
For low-speed turbulent flows governed by compressible Navier–Stokes equations, the
large disparity of phase velocities between hydrodynamic wave and acoustic wave leads to …

A low mach preconditioned harmonic balance solver for cavity flutter computations

P Sivel, C Frey, HP Kersken… - … of Engineering for …, 2025 - asmedigitalcollection.asme.org
Labyrinth seal flutter is a critical phenomenon in turbomachinery, as it can lead to severe
structural vibrations and potential component damage. Accurate prediction and mitigation of …

[HTML][HTML] Divergence-free turbulent inflow data from realistic covariance tensor

Y Dreze, M Hao, L di Mare - Physics of Fluids, 2023 - pubs.aip.org
Scale-resolving computational fluid dynamics (CFD) methods require carefully constructed
boundary conditions to produce accurate results. The inflow data should be unsteady and …

Extension of an all-Mach Roe scheme able to deal with low Mach acoustics to full Euler system

T Galié, J Jung, I Lannabi… - ESAIM: Proceedings and …, 2024 - univ-pau.hal.science
We propose to extend the fix of Roe's approximate Riemann solver developed for the
Barotropic Euler equations in [2] to the full Euler equations. This scheme is built mainly to …

[PDF][PDF] Asymptotic-preserving IMEX schemes for the Euler equations of non-ideal gases

G Orlando, L Bonaventura - arXiv preprint arXiv:2402.09252, 2024 - researchgate.net
We analyze schemes based on a general Implicit-Explicit (IMEX) time discretization for the
compressible Euler equations of gas dynamics, showing that they are asymptotic-preserving …

Artificial diffusion for convective and acoustic low Mach number flows II: Application to Liou-Steffen, Zha-Bilgen and Toro-Vasquez convection-pressure flux splittings

J Hope-Collins, L di Mare - arXiv preprint arXiv:2303.10740, 2023 - arxiv.org
Liou-Steffen splitting (AUSM) schemes are popular for low Mach number simulations,
however, like many numerical schemes for compressible flow they require careful …

Low Mach Preconditioning for Harmonic Balance Solvers

P Sivel, C Frey - 9th European Congress on Computational Methods in …, 2024 - elib.dlr.de
Density-based solvers suffer from a decrease in solution quality and convergence rate as
the Mach number decreases. Previous studies have demonstrated that low Mach precon  …

Implementierung und Untersuchung von Roe-Schemen für Low-Mach Simulationen

M Berger - 2023 - elib.dlr.de
Das Roe Schema ist eines der weitverbreitetsten Abwind-Verfahren. Es liefert gute
Ergebnisse für transsonische Strömungen und bei der Auflösung von Grenzschichten …

An improved artificial compressibility method for aeroacoustics at low Mach numbers

Z Zhang, Y Li, É Spieser, P Zhou… - INTER-NOISE and …, 2023 - ingentaconnect.com
This work presents an improved artificial compressibility method that enables correct sound
propagation behaviour in low Mach number flows. As an extension of incompressible …