Objectif 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. Mots‑clés Fluid dynamics interfacial waves multiphase flow Programme(s) FP7-PEOPLE - Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Thème(s) PEOPLE-2007-4-2.IIF - Marie Curie Action: "International Incoming Fellowships" Appel à propositions FP7-PEOPLE-2007-4-2-IIF Voir d’autres projets de cet appel Régime de financement MC-IIF - International Incoming Fellowships (IIF) Coordinateur IMPERIAL COLLEGE OF SCIENCE TECHNOLOGY AND MEDICINE Contribution de l’UE € 161 792,99 Adresse SOUTH KENSINGTON CAMPUS EXHIBITION ROAD SW7 2AZ LONDON Royaume-Uni Voir sur la carte Région London Inner London — West Westminster Type d’activité Higher or Secondary Education Establishments Contact administratif Shaun Power (Mr.) Liens Contacter l’organisation Opens in new window Site web Opens in new window Coût total Aucune donnée
