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Tesi etd-04222012-225553


Thesis type
Tesi di dottorato di ricerca
Author
CALGARO, BARBARA
URN
etd-04222012-225553
Title
DEVELOPMENT OF CLOSURE RELATIONSHIPS FOR ADVANCED TWO-PHASE FLOW ANALYSIS
Settore scientifico disciplinare
ING-IND/19
Corso di studi
SICUREZZA NUCLEARE E INDUSTRIALE
Commissione
tutor Ambrosini, Walter
tutor Forgione, Nicola
tutor Andreussi, Paolo
tutor Bonizzi, Marco
Parole chiave
  • slug flow
  • multi-field model
  • MAST
  • friction factor
  • two-phase flow
Data inizio appello
05/07/2012;
Consultabilità
completa
Riassunto analitico
During this doctoral activity, developed at TEA Sistemi SpA with the contribution of the University of Pisa in the context of an R&amp;D project funded by ENI E&amp;P, the formulation of a new set of liquid-wall and gas-liquid interfacial friction factor correlations was performed. The attention was focused on the improvement of existing correlations when applied to the design of long transportation pipelines.<br>In this aim, a new set of data related to nitrogen-water flow in a 80 mm pipe operating at pressures in the range 5-25 bar has been used along with data published in the open literature (mainly concerning air-water flows at atmospheric pressure). These data were used to develop new correlations for friction factors in horizontal stratified gas-liquid flow conditions.<br>Moreover a new multi-field model called MAST (Multiphase Analysis and Simulation of Transition), recently developed at TEA Sistemi SpA with the support of ENI E&amp;P and addressing the Oil&amp;Gas field, was presented in detail during this activity and validated against experimental measurements for the investigation of the long slug flow sub-regime.
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