Stability analysis of a zero-dimensional model of PWR core using non-modal stability theory
Sign Up to like & getrecommendations! Published in 2020 at "Annals of Nuclear Energy"
DOI: 10.1016/j.anucene.2020.107624
Abstract: Abstract In this work, non-modal stability theory is used to study the non-linear dynamics of the Pressurised Water Reactor (PWR), using a zero-dimensional model. Usually, stability analysis for nuclear reactors is performed using modal methods.… read more here.
Keywords: stability analysis; model; modal stability; non modal ... See more keywords
Non-modal transient growth of disturbances in pulsatile and oscillatory pipe flows
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2020.940
Abstract: Abstract Laminar flows through pipes driven at steady, pulsatile or oscillatory rates undergo a subcritical transition to turbulence. We carry out an extensive linear non-modal stability analysis of these flows and show that for sufficiently… read more here.
Keywords: pulsatile oscillatory; oscillatory pipe; oscillatory flow; non modal ... See more keywords
Mechanisms underlying how free surfaces influence very-large-scale motions in turbulent plane open channel flows based on linear non-modal analysis
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2024.1140
Abstract: Abstract Linear non-modal analyses are performed to study the mechanism of how deformable free surfaces influence very-large-scale motions (VLSMs) in turbulent open channel flows. The mean velocity and eddy viscosity profiles obtained from direct numerical… read more here.
Keywords: open channel; non modal; linear non; channel flows ... See more keywords
Non-modal analysis of Rayleigh–Bénard convection with and without bounded shear flows in viscoelastic fluids
Sign Up to like & getrecommendations! Published in 2025 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2025.291
Abstract: Abstract We perform a comprehensive linear non-modal stability analysis of the Rayleigh–Bénard convection with and without a Poiseuille/Couette flow in Oldroyd-B fluids. In the absence of shear flow, unlike the Newtonian case in which the… read more here.
Keywords: convection without; energy; non modal; nard convection ... See more keywords
Modal and non-modal stability for Hagen–Poiseuille flow with non-ideal fluid
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DOI: 10.1063/5.0205600
Abstract: Modal and non-modal stability analyses are applied to Hagen–Poiseuille flow with a non-ideal fluid. The non-ideal fluid is defined as a fluid close to its vapor–liquid critical point. In this region, properties of the fluid… read more here.
Keywords: non modal; non ideal; modal stability; ideal fluid ... See more keywords
Non-Modal Three-Dimensional Optimal Perturbation Growth in Thermally Stratified Mixing Layers
Sign Up to like & getrecommendations! Published in 2021 at "Fluids"
DOI: 10.3390/fluids6010037
Abstract: A non-modal transient disturbances growth in a stably stratified mixing layer flow is studied numerically. The model accounts for a density gradient within a shear region, implying a heavier layer at the bottom. Numerical analysis… read more here.
Keywords: growth; three dimensional; non modal; optimal perturbation ... See more keywords