ETD system

Electronic theses and dissertations repository

 

Tesi etd-05042018-091252


Thesis type
Tesi di dottorato di ricerca
Author
SACCONE, GIACOMO
email address
giacomo.saccone@gmail.com
URN
etd-05042018-091252
Title
Effects of Force Fields on Interface Dynamics in view of Two-Phase Heat Transfer Enhancement and Phase Management in Space Applications
Settore scientifico disciplinare
ING-IND/11
Corso di studi
INGEGNERIA DELL'ENERGIA, DEI SISTEMI, DEL TERRITORIO E DELLE COSTRUZIONI
Supervisors
tutor Prof. Di Marco, Paolo
Parole chiave
  • microstructure
  • critical heat flux
  • chf
  • wettability
  • electric field
  • Boiling
Data inizio appello
07/05/2018;
Consultabilità
Completa
Riassunto analitico
Phase change is generally the most effective method to transfer heat. When
phase change is present, an interface between the two phases exists. The
dynamics of interfaces is a very important topic for everything concerning
heat transfer.
Since the two phases are characterized by a strong density difference,
gravity is in most cases essential to separate them. When gravity lacks, the
two phases are mixed together and there is no preferential direction where
the less dense phase can go.
The purpose of this work is to prove the feasibility, reproducibility and
reliability in the use of the electric field as a replacement of gravity in
separating the two phases and enhancing heat transfer.
The dissertation will discuss several years of experimental investigations
dealing with droplets and bubbles, with and without transfer of heat,
momentum and mass across the interface, with and without the gravity field,
with and without the electric field.
Finally, the used tools, literature and new models implemented to derive all
forces acting on the interfaces will be discussed in order to complete the
analysis from an experimental and theoretical point of view.
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