Frequency prediction from exact or self-consistent meanflows

Autor: Bengana, Yacine, Tuckerman, Laurette S.

Publikováno v: Physical Review Fluids 6, 063901 (2021)

A number of approximations have been proposed to estimate basic hydrodynamic quantities, in particular the frequency of a limit cycle. One of these, RZIF (for Real Zero Imaginary Frequency), calls for linearizing the governing equations about the mea

Externí odkaz: http://arxiv.org/abs/2102.07255

Spirals and ribbons in counter-rotating Taylor-Couette flow: frequencies from mean flows and heteroclinic orbits

Autor: Bengana, Yacine, Tuckerman, Laurette S.

Publikováno v: Phys. Rev. Fluids 4, 044402 (2019)

A number of time-periodic flows have been found to have a property called RZIF: when a linear stability analysis is carried out about the temporal mean (rather than the usual steady state), an eigenvalue is obtained whose Real part is Zero and whose

Externí odkaz: http://arxiv.org/abs/1905.01746

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Simulations numériques pour la prédiction de fréquences par champs moyens

Autor: Bengana, Yacine

Publikováno v: Mechanics [physics]. PSL Research University, 2018. English. ⟨NNT : 2018PSLET032⟩
Mechanics [physics]. Université Paris sciences et lettres, 2018. English. ⟨NNT : 2018PSLET032⟩

Fluid flows play an important role in many natural phenomena as well as in many industrial applications. In this thesis, we are interested in oscillating flows origins from a Hopf bifurcation.The open shear-driven square cavity has two limit cycles s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::675a7cf9ef328f330983e39cc7f931dc
https://hal.archives-ouvertes.fr/tel-02170483v2/document