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Splitting methods for relaxation two-phase flow models

Abstract

A model for two-phase pipeline flow is presented, with evaporation and condensation modelled using a relaxation source term based on statistical rate theory. The model is solved numerically using a Godunov splitting scheme, making it possible to solve the hyperbolic fluid-mechanic equation system and the relaxation term separately. The hyperbolic equation system is solved using the multi-stage (MUSTA) finite volume scheme. The stiff relaxation term is solved using two approaches: one based on the Backward Euler method, and one using a time-asymptotic scheme. The results from these two methods are presented and compared for a CO2 pipeline depressurisation case. Copyright © 2013 Inderscience Enterprises Ltd.

Category

Academic article

Client

  • Research Council of Norway (RCN) / 189978

Language

English

Author(s)

  • Halvor Lund
  • Peder Aursand

Affiliation

  • Norwegian University of Science and Technology
  • SINTEF Energy Research / Gassteknologi

Year

2013

Published in

International Journal of Materials Engineering Innovation

ISSN

1757-2754

Publisher

InderScience Publishers

Volume

4

Issue

2

Page(s)

117 - 131

View this publication at Cristin