Fontanarosa, Giuseppe (2024) Fluid Dynamics of a Sessile Droplet Through Electrohydrodynamic Effect for Microfluidic Applications. [Tesi di dottorato]
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| Tipologia del documento: | Tesi di dottorato |
|---|---|
| Lingua: | English |
| Titolo: | Fluid Dynamics of a Sessile Droplet Through Electrohydrodynamic Effect for Microfluidic Applications |
| Autori: | Autore Email Fontanarosa, Giuseppe giuseppe.fontanarosa@unina.it |
| Data: | 11 Dicembre 2024 |
| Numero di pagine: | 108 |
| Istituzione: | Università degli Studi di Napoli Federico II |
| Dipartimento: | Ingegneria Chimica, dei Materiali e della Produzione Industriale |
| Dottorato: | Ingegneria dei prodotti e dei processi industriali |
| Ciclo di dottorato: | 37 |
| Coordinatore del Corso di dottorato: | nome email D'Anna, Andrea didatticadottorato.dicmapi@unina.it |
| Tutor: | nome email D'Avino, Gaetano [non definito] Maffettone, Pier Luca [non definito] |
| Data: | 11 Dicembre 2024 |
| Numero di pagine: | 108 |
| Parole chiave: | Electrohydrodynamics, subcritical regime, supercritical regime, stability limit, numerical simulations, viscoelastic fluids |
| Settori scientifico-disciplinari del MIUR: | Area 09 - Ingegneria industriale e dell'informazione > ING-IND/06 - Fluidodinamica Area 09 - Ingegneria industriale e dell'informazione > ING-IND/24 - Principi di ingegneria chimica Area 09 - Ingegneria industriale e dell'informazione > ING-IND/27 - Chimica industriale e tecnologica |
| Depositato il: | 24 Nov 2025 06:00 |
| Ultima modifica: | 12 Ago 2026 05:38 |
| URI: | https://www.fedoa.unina.it/id/eprint/16488 |
Abstract
The application of an external electric field to induce the motion and deformation of a fluid can be efficiently exploited to precisely manipu- late a small amount of a liquid, offering significant potential in various industrial and scientific contexts. The fluid dynamics response of the liq- uid, however, might be difficult to predict especially when dealing with non-conventional fluids, due to the complex interactions between the ap- plied electric field and the fluid physical properties. To overcome these challenges and gain a more detailed understanding of the electrohydrody- namics (EHD) phenomena involved, computational tools are a valuable complement to experimental investigations, allowing accurate predictions of the system behavior under controlled conditions. The main objective of this thesis is to study the relationship between fluid properties and the application of an external electric field, with a particular focus on the dynamic behavior of a sessile droplet. The study initially focuses on Newtonian fluids and is later extended to viscoelastic liquids. For the Newtonian fluid, an in-depth analysis of stability regimes is conducted, exploring subcritical and supercritical regimes in relation to three key parameters: viscosity, electrical conductivity, and electric field intensity. For viscoelastic fluids, the analysis focuses on the subcritical regime, providing essential insights into the dynamic behavior and the influences exerted by the physical properties of the fluid. This research contributes to the understanding of EHD phenomena, opening new avenues for the development of innovative and efficient tech- nological solutions, with particular application to a medical device cur- rently under development.
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