Proper orthogonal decomposition analysis and modelling of the wake deviation behind a squareback Ahmed body
Bérengère Podvin, Stéphanie Pellerin, Yann Fraigneau, Antoine Evrard, Olivier Cadot
Abstract
The global wake dynamics of an Ahmed body are correctly captured by a proper-orthogonal-decomposition (POD)-based low-dimensional model. The POD modes include the quasisteady wake deviation with intermittent switches, both vortex shedding modes and bubble pumping mechanisms.
Topics & Concepts
WakeVortex sheddingProper orthogonal decompositionWake turbulenceMathematicsMechanicsVortexPhysicsBubbleMode (computer interface)Mathematical analysisDynamics (music)Control theory (sociology)MeteorologyDynamic mode decompositionVorticityClassical mechanicsKármán vortex streetStatistical physicsAerodynamics and Fluid Dynamics ResearchFluid Dynamics and Vibration AnalysisBiomimetic flight and propulsion mechanisms