Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4993319 | International Journal of Heat and Fluid Flow | 2016 | 9 Pages |
Abstract
Perturbation wavepackets in a jet, induced by externally applied forcing, are computed from the linearized equations of motion. An experimentally measured mean flow serves as the base state for this linear analysis, and optimally amplified mono-frequency perturbations are identified, in the sense of maximal gain between the forcing energy input and the flow response energy. Sub-optimal orthogonal forcing/response structures are also discussed. Linear analysis results are then compared to measured perturbation wavepackets in the jet experiment. The study addresses the question to what extent the true dynamics of a turbulent jet can be represented by a model based on linear instability.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Onofrio Semeraro, Lutz Lesshafft, Vincent Jaunet, Peter Jordan,