Now showing items 1-7 of 7

• #### CO2 pipeline integrity: A new evaluation methodology ﻿

(Journal article; Peer reviewed, 2011)
A coupled fluid-structure model for pipeline integrity simulations has been developed. The pipe material and fracture propagation have been modelled using the finite-element method with a local fracture criterion. The ...
• #### Mathematical modelling and numerical simulation of two-phase multi-component flows of CO₂ mixtures in pipes ﻿

(Doktoravhandlinger ved NTNU, 1503-8181; 2012:296, Doctoral thesis, 2012)
In this thesis, the modelling of one-dimensional two-phase flows is studied, as well as the associated numerical methods. The background for this study is the need for numerical tools to simulate fast transients in pressurised ...
• #### On interface transfer terms in two-fluid models ﻿

(Journal article; Peer reviewed, 2012)
In this note we consider two-fluid models based on the usual formulations for conservation of mass, total momentum and total energy. We present some potentially useful general relationships between the interface exchange ...
• #### On solutions to equilibrium problems for systems of stiffened gases ﻿

(Journal article; Peer reviewed, 2011)
We consider an isolated system of N immiscible fluids, each following a stiffened-gas equation of state. We consider the problem of calculating equilibrium states from the conserved fluid-mechanical properties, i.e., the ...
• #### Pipe Networks: Coupling Constants in a Junction for the Isentropic Euler Equations ﻿

(Journal article; Peer reviewed, 2015)
The modelling of junctions in pipe networks with subsonic flows is discussed, where pipes are described by one-dimensional, single-phase isentropic flow models. We first study the Riemann problem in a pipe to understand ...
• #### Pipeline flow modelling with source terms due to leakage: The straw method ﻿

(Journal article; Peer reviewed, 2012)
A numerical method for calculating the leakage flow rate through a crack in a pressurized pipeline is presented. Calculations of the flow inside, and leakage from, a pipeline with a running crack are performed. For the ...
• #### Wave propagation in multicomponent flow models ﻿

(Journal article; Peer reviewed, 2010)
We consider systems of hyperbolic balance laws governing flows of an arbitrary number of components equipped with general equations of state. The components are assumed to be immiscible. We compare two such models: one in ...