Villone, Massimiliano Maria (2014) Numerical simulations of deformable systems in flowing media. [Tesi di dottorato]
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Tesi Dottorato Massimiliano Villone.pdf Download (3MB) | Anteprima |
| Tipologia del documento: | Tesi di dottorato |
|---|---|
| Lingua: | English |
| Titolo: | Numerical simulations of deformable systems in flowing media |
| Autori: | Autore Email Villone, Massimiliano Maria massimilianomaria.villone@unina.it |
| Data: | 25 Marzo 2014 |
| Numero di pagine: | 122 |
| Istituzione: | Università degli Studi di Napoli Federico II |
| Dipartimento: | Ingegneria Chimica, dei Materiali e della Produzione Industriale |
| Scuola di dottorato: | Ingegneria industriale |
| Dottorato: | Ingegneria chimica |
| Ciclo di dottorato: | 26 |
| Coordinatore del Corso di dottorato: | nome email D'Anna, Andrea andrea.danna@unina.it |
| Tutor: | nome email Maffettone, Pier Luca [non definito] |
| Data: | 25 Marzo 2014 |
| Numero di pagine: | 122 |
| Parole chiave: | Numerical simulations Deformation Viscoelastic fluids |
| Settori scientifico-disciplinari del MIUR: | Area 09 - Ingegneria industriale e dell'informazione > ING-IND/26 - Teoria dello sviluppo dei processi chimici |
| Depositato il: | 08 Apr 2014 20:24 |
| Ultima modifica: | 26 Gen 2015 11:39 |
| URI: | http://www.fedoa.unina.it/id/eprint/9664 |
Abstract
Over the last 15 years, microfluidics has gained an increasing importance. In several microfluidic systems, as cytometric, sorting and diagnostic devices, suspensions of particles flow in miniaturized channels. In such a situation, a wide range of phenomena can arise due to the deformability and the elasticity of the suspended objects, the geometry of the channels, the interactions between the objects and the walls of the flow cells, and the complexity of the suspending media. Aim of the present thesis is of developing and applying a finite element method-based code to study the dynamics of soft systems suspended in New- tonian and viscoelastic fluids under flow. The code is developed by adapting and extending an arbitrary Lagrangian Eulerian finite element method based numerical code for viscoelastic fluids us- ing well-known stabilization techniques (SUPG, DEVSS, log-conformation), and it is validated for drops and elastic particles in unbounded shear flow by comparison with available theoretical, experimental and numerical results. Then, a single-body problem is considered: the behavior of an initially spherical elastic particle suspended in confined shear flow of a Newtonian and a Giesekus viscoelastic liquid is studied. Finally, a multi-body system is investigated: the bulk linear viscoelastic properties of monodisperse emulsions of Newtonian drops in a Newtonian matrix are computed.
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