The effect of incoming boundary layer thickness and Mach number on linear and nonlinear Rossiter modes in open cavity flows

MS Mathias, MAF Medeiros - Theoretical and Computational Fluid …, 2021 - Springer
The Rossiter modes of an open cavity were studied using bi-global linear analysis, local
instability analysis and nonlinear numerical simulations. Rossiter modes are normally seen …

Numerical simulation of rheological models for complex fluids using hierarchical grids

HA Castillo-Sánchez, LF de Souza, A Castelo - Polymers, 2022 - mdpi.com
In this work, we implement models that are able to describe complex rheological behaviour
(such as shear-banding and elastoviscoplasticity) in the HiGTree/HiGFlow system, which is …

DNS and LST stability analysis of Oldroyd-B fluid in a flow between two parallel plates

AC Brandi, MT Mendonça, LF Souza - Journal of Non-Newtonian Fluid …, 2019 - Elsevier
Several flows of practical interest are of viscoelastic fluids and it is desirable to know if these
flows are in a laminar or turbulent state. In this paper, the laminar-turbulent transition is …

A compact finite differences exact projection method for the Navier–Stokes equations on a staggered grid with fourth-order spatial precision

GA Reis, IVM Tasso, LF Souza, JA Cuminato - Computers & Fluids, 2015 - Elsevier
An exact projection method for the numerical solution of the incompressible Navier–Stokes
equations is devised. In all spatial discretizations, fourth-order compact finite differences are …

High-order-accurate incompressible flow solver for high-fidelity numerical simulations and linear stability analysis

S Hosseinverdi, HF Fasel - AIAA Journal, 2023 - arc.aiaa.org
The development of high-fidelity versatile incompressible Navier–Stokes solver that is
applicable for both direct numerical simulations (DNSs) and linear global stability …

Different formulations to solve the Giesekus model for flow between two parallel plates

LJ da Silva Furlan, MT de Araujo, AC Brandi… - Applied Sciences, 2021 - mdpi.com
This work presents different formulations to obtain the solution for the Giesekus constitutive
model for a flow between two parallel plates. The first one is the formulation based on work …

Heat transfer analysis in a flow over concave wall with primary and secondary instabilities

V Malatesta, LF Souza, JTC Liu, MJ Kloker - Procedia IUTAM, 2015 - Elsevier
The centrifugal instability mechanism in boundary layers over concave surfaces is
responsible for the development of counter-rotating vortices, aligned in the streamwise …

Verification of a mixed high‐order accurate DNS code for laminar turbulent transition by the method of manufactured solutions

HG Silva, LF Souza… - International Journal for …, 2010 - Wiley Online Library
This paper presents results on a verification test of a Direct Numerical Simulation code of
mixed high‐order of accuracy using the method of manufactured solutions (MMS). This test …

Optimal computational parameters for maximum accuracy and minimum cost of Arnoldi-based time-stepping methods for flow global stability analysis

MS Mathias, MAF de Medeiros - Theoretical and Computational Fluid …, 2022 - Springer
Global instability analysis of flows is often performed via time-stepping methods, based on
the Arnoldi algorithm. When setting up these methods, several computational parameters …

A compact finite-difference scheme based on the projection method for natural-convection heat transfer

K Zhang, M Yang, Y Zhang - Numerical Heat Transfer, Part B …, 2012 - Taylor & Francis
Compact finite-difference formulations on nonuniform grids are developed by matching
Taylor series of various orders. The accuracies of those formulations are analyzed by the …