• norsk
    • English
  • English 
    • norsk
    • English
  • Login
View Item 
  •   Home
  • Fakultet for ingeniørvitenskap (IV)
  • Institutt for marin teknikk
  • View Item
  •   Home
  • Fakultet for ingeniørvitenskap (IV)
  • Institutt for marin teknikk
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Dynamic Response of Flexible Risers due to Unsteady Slug Flow

Ortega Malca, Arturo Jesús
Doctoral thesis
Thumbnail
View/Open
Fulltext (PDF) available (20.93Mb)
URI
http://hdl.handle.net/11250/2354059
Date
2015
Metadata
Show full item record
Collections
  • Institutt for marin teknikk [3632]
Abstract
In this work the influence of unsteady slug flow on the dynamic response of flexible

risers is analysed using a computational tool consisting of one program for prediction of

slug flow development, and another program for calculation of dynamic response of

the riser. Both programs apply a time integration method, and since slug flow leads to

dynamic response of the riser, and riser dynamics influences slug flow behaviour, the

two codes exchange feedback of information during the integration process. Information

exchange is established by building a computer federation of programs based on High

Level Architecture (HLA). The federation is composed of two standalone in-house

computer codes. The first one is a two-phase flow code which simulates unsteady slug

flow through pipes and risers using a Lagrangian tracking model. The second one is a

program for static and dynamic global riser analysis based on a two dimensional nonlinear

finite element formulation. Using the HLA rules, a communication interface was

built, so the two programs are able to perform synchronized time integration with

mutual feedback of information for each time step.

The slug flow – riser dynamics interaction is a complex problem. The riser response

depends on the slug flow behaviour, and the slug flow development is influenced by the

riser configuration. Displacement response of the riser and the influence of them on the

slug flow development have been studied for different flexible riser configurations

carrying different liquid and gas flow rates. Results have shown the importance of using

complete mathematical models for each phenomena and the importance of a strong

interface of communication in order to predict a realistic behaviour of the slug flow -

riser dynamics interaction. Analysis on the influence of the slug flow on the effective

tension and bending moment of a flexible riser was studied showing increment of axial

and bending stresses. Moreover, the simulations have demonstrated the importance to

use a full non-linear finite element model for the riser dynamics, because the riser

response influence strongly on the slug flow behaviour. Finally, the numerical results

were validated against experimental data showing a reasonable agreement.
Publisher
NTNU
Series
Doctoral thesis at NTNU;2015:182

Contact Us | Send Feedback

Privacy policy
DSpace software copyright © 2002-2019  DuraSpace

Service from  Unit
 

 

Browse

ArchiveCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsDocument TypesJournalsThis CollectionBy Issue DateAuthorsTitlesSubjectsDocument TypesJournals

My Account

Login

Statistics

View Usage Statistics

Contact Us | Send Feedback

Privacy policy
DSpace software copyright © 2002-2019  DuraSpace

Service from  Unit