Obiettivo In this proposal we outline a framework for studying interfacial wave dynamics between gas-liquid and liquid-liquid flows using the nonlinear Parabolized Stability Equations (PSE). Previous studies have shown that the nonlinear PSE is an efficient and accurate method for modeling convectively traveling disturbance waves in a slowly evolving mean flow. By combining the PSE approach with an appropriate level set technique, the method can then track the growth and evolution of interfacial waves in two phase flows. The envisaged PSE framework is superior to the linear stability approach because it incorporates the effects of nonlinear mean flows, finite interfacial deformations, and nonlinear modal interactions. In addition, the streamwise marching based solution procedure in the proposed PSE-level set method is also more computationally efficient when compared to higher fidelity Direct Numerical Simulations (DNS). The proposed framework will be applied to a variety of two phase flow problems, including problems of both fundamental and practical importance. In order to validate the method, the PSE-level set framework will be tested on the canonical Kelvin-Helmholtz shear flow instability, and the results compared with linear stability and DNS calculations. Once verified, the approach will be applied to various challenging problems, including the capillary wave breakup of liquid jets, liquid film instabilities in annular two phase flow, wind-ocean interactions in geophysical flows, and bypass transition phenomena in two phase boundary layers. Parole chiave Fluid dynamics interfacial waves multiphase flow Programma(i) FP7-PEOPLE - Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Argomento(i) PEOPLE-2007-4-2.IIF - Marie Curie Action: "International Incoming Fellowships" Invito a presentare proposte FP7-PEOPLE-2007-4-2-IIF Vedi altri progetti per questo bando Meccanismo di finanziamento MC-IIF - International Incoming Fellowships (IIF) Coordinatore IMPERIAL COLLEGE OF SCIENCE TECHNOLOGY AND MEDICINE Contributo UE € 161 792,99 Indirizzo SOUTH KENSINGTON CAMPUS EXHIBITION ROAD SW7 2AZ LONDON Regno Unito Mostra sulla mappa Regione London Inner London — West Westminster Tipo di attività Higher or Secondary Education Establishments Contatto amministrativo Shaun Power (Mr.) Collegamenti Contatta l’organizzazione Opens in new window Sito web Opens in new window Costo totale Nessun dato
