Villone, Massimiliano Maria (2014) Numerical simulations of deformable systems in flowing media. [Tesi di dottorato]

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Item Type: Tesi di dottorato
Lingua: English
Title: Numerical simulations of deformable systems in flowing media
Creators:
CreatorsEmail
Villone, Massimiliano Mariamassimilianomaria.villone@unina.it
Date: 25 March 2014
Number of Pages: 122
Institution: Università degli Studi di Napoli Federico II
Department: 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:
nomeemail
D'Anna, Andreaandrea.danna@unina.it
Tutor:
nomeemail
Maffettone, Pier LucaUNSPECIFIED
Date: 25 March 2014
Number of Pages: 122
Uncontrolled Keywords: 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
Date Deposited: 08 Apr 2014 20:24
Last Modified: 26 Jan 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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