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 …

The development of a separated bottom boundary layer in the footprint of a large-amplitude
internal solitary wave of depression, propagating against an oncoming barotropic current, is …

Separation-induced transition under a low level of freestream turbulence is investigated via
direct numerical simulation of flow over a low-pressure turbine cascade. The results are …

The process through which a laminar flow undergoes transition to turbulence is of great
fundamental and practical interest. Such a process is hugely complex as there are many …

It is well established in the natural transition of an attached boundary layer that the transition
process starts with a two–dimensional primary instability (Tollmien–Schlichting wave …

Theoretical developments for hydrodynamic instability analysis are often based on
eigenvalue problems, the size of which depends on the dimensionality of the reference state …

Two-equation eddy-viscosity models using the Boussinesq approximation are a popular tool
in engineering applica-tions. The family of k-ω models have been quite successful in …

A instabilidade de escoamentos laminares, a transiçao de regime laminar para turbulento e
a turbulência sao tópicos de grande interesse em dinâmica dos fluidos, tanto para …

The understanding and identification of the physical instability mechanisms responsible for
the appearance of unsteadiness and three-dimensionality on laminar separation bubbles …

Le but de cette thèse est de proposer des modèles qui améliorent la précision des
prévisions RANS des bulbes de décollement laminaire. Dans un premier temps, des …