Titlebook: IUTAM Laminar-Turbulent Transition; 9th IUTAM Symposium, Spencer Sherwin,Peter Schmid,Xuesong Wu Conference proceedings 2022 The Editor(s)

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institute

使入迷

Unraveling Transition and Turbulence Using Nonlinear Optimizationpowerful tool coupling nonnormality and nonlinearity, allowing to explore the phase space at a finite distance from the reference flow and study its nonlinear stability. This tool allows to compute: (i) minimal energy thresholds for transition, (ii) the most amplified coherent structures in transiti

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Predicting Laminar-Turbulent Transition Influenced by Surface-Induced Flow Distortionsart of the boundary-layer flow. Different routes to transition are discussed as a function of the type and level of surface irregularity perturbing the flow. Amplitude methods offer the best potential for predicting the gradual movement of transition with increasing levels of flow distortion. Global

engender

40 Years of Transition Research at NASA: A Personal Perspectiven this paper. This includes development of computational methods for compressible stability analysis, linear and nonlinear parabolized stability equations, development of quiet supersonic and hypersonic tunnels, supersonic and hypersonic boundary layer transition prediction including the effects of

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Progress in Stability and Transition Researchor over the past four decades in collaboration with her colleagues and students. The overarching approach has been one of verification and validation, including working closely with experimentalists (both with ground facilities and flight platforms) to achieve closure between theory and experiment.

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MIRTH

Nonlinear Optimal Disturbances in Compressible Shear Flowsarallel periodic pipe flow at . and .. At low initial perturbation energy, the computed perturbations recover the results of linear transient growth analyses. At higher amplitudes, nonlinear effects become relevant, leading to higher energy gains which match the results for incompressible shear flow

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