Lutz Lesshafft

Research Director at the CNRS

Adjunct Professor at École Polytechnique



Introduction to Hydrodynamic Instability

MEC631 at École polytechnique (Master level)

Fundamental and advanced concepts of flow instability analysis are introduced. Linear eigenmode analysis in local and global formulations, non-modal description of a linear system response to forcing, and nonlinear saturation effects are the main topics.


MECxxx at École polytechnique (Master level)

Basics of general acoustic theory are covered first: plane and spherical waves, compact and non-compact sources. The generation of sound by flow unsteadiness is then addressed by means of acoustic analogies.