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Splitting methods for relaxation two-phase flow models

Lund, Halvor; Aursand, Peder
Journal article, Peer reviewed
Accepted version
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Permanent link
http://hdl.handle.net/11250/2469427
Issue date
2013
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  • Publikasjoner fra CRIStin - NTNU [7622]
  • Institutt for energi og prosessteknikk [1560]
Original version
International Journal of Materials Engineering Innovation. 2013, 4 (2), 117-131.   10.1504/IJMATEI.2013.054391
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.
Publisher
Inderscience
Journal
International Journal of Materials Engineering Innovation

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