Purpose of the present work is to develop a weakly nonlinear analysis of the streaks breakdown phase in the regeneration process. The model is based on a perturbation expansion of the perturbation field in terms of the amplitude ε of the disturbance. The effect of external noise on streamwise streaks is addressed to follow the destabilization process by accounting at the same time for the temporal evolution of the linear streamwise streaks. Analogies and differences with the classical Floquet theory are illustrated to enlighten limits and advantages of the two formulations.

Perturbation analysis for streaks instability in transitional flows / Ponziani, Donatella; Casciola, Carlo Massimo. - In: ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK. - ISSN 0044-2267. - STAMPA. - 80:(2000), pp. 807-14. [10.1002/1521-4001(200011)80:11]

Perturbation analysis for streaks instability in transitional flows

PONZIANI, Donatella;CASCIOLA, Carlo Massimo
2000

Abstract

Purpose of the present work is to develop a weakly nonlinear analysis of the streaks breakdown phase in the regeneration process. The model is based on a perturbation expansion of the perturbation field in terms of the amplitude ε of the disturbance. The effect of external noise on streamwise streaks is addressed to follow the destabilization process by accounting at the same time for the temporal evolution of the linear streamwise streaks. Analogies and differences with the classical Floquet theory are illustrated to enlighten limits and advantages of the two formulations.
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/70005
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact