Optimal perturbations and transition energy thresholds in boundary layer shear flows
Chris Vavaliaris, Miguel Beneitez, Dan S. Henningson
Abstract
Adjoint-based optimization is performed in a Blasius boundary layer flow, leading to the computation of the subcritical transition critical energy threshold and associated minimal seed. Simulation results demonstrate the physical characteristics and key energy growth mechanisms of the perturbations. Phase-space representation of the minimal seed's evolution leads to the identification of a persistent attracting region.
Topics & Concepts
Boundary layerComputationBlasius boundary layerPhase transitionSpace (punctuation)MechanicsRepresentation (politics)Flow (mathematics)Boundary (topology)PhysicsStatistical physicsEnergy (signal processing)Shear (geology)MathematicsComputer scienceBoundary layer thicknessMathematical analysisGeologyAlgorithmCondensed matter physicsQuantum mechanicsOperating systemLawPoliticsPetrologyPolitical scienceFluid Dynamics and Turbulent FlowsPlant Water Relations and Carbon DynamicsCombustion and flame dynamics