Gunnar Andreas Staff
Gunnar Andreas Staff
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Stability of the parareal algorithm
GA Staff, EM Rønquist
Domain decomposition methods in science and engineering, 449-456, 2005
Order-optimal preconditioners for implicit Runge–Kutta schemes applied to parabolic PDEs
KA Mardal, TK Nilssen, GA Staff
SIAM Journal on Scientific Computing 29 (1), 361-375, 2007
Preconditioning of fully implicit Runge-Kutta schemes for parabolic PDEs
GA Staff, KA Mardal, TK Nilssen
Basic flow modelling for long distance transport of wellstream fluids
D Biberg, H Holmås, G Staff, T Sira, J Nossen, P Andersson, C Lawrence, ...
BHR International Conference on Multiphase Production Technology, BHR-2009-J2, 2009
Accounting for flow model uncertainties in gas-condensate field design using the OLGA High Definition Stratified Flow Model
D Biberg, G Staff, N Hoyer, H Holm
BHR International Conference on Multiphase Production Technology, BHR-2015-G5, 2015
Using python to solve partial differential equations
KA Mardal, O Skavhaug, GT Lines, GA Staff, A Odegard
Computing in Science & Engineering 9 (3), 48-51, 2007
Convergence and stability of the parareal algorithm: A numerical and theoretical investigation
G Staff
SIS-2003-312, 2003
Mechanistic models for three-phase stratified and slug flows with dispersions
C Lawrence, J Nossen, R Skartlien, O Sendstad, O Skjæraasen, J Hua, ...
BHR International Conference on Multiphase Production Technology, BHR-2013-E6, 2013
The parareal algorithm, a survey of present work
GA Staff, E Rønquist
NOTUR Emerging technologies, Cluster technologies, 2003
Physics guided machine learning significantly improves outcomes for data-based production optimization
G Staff, G Zarruk, J Hatleskog, S Stavland, H McNulty, R Ibarra, N Calen, ...
Abu Dhabi International Petroleum Exhibition and Conference, D011S019R003, 2020
Validation of OLGA HD Against Transient and Pseudotransient Experiments from the SINTEF Large Diameter High Pressure Flow-Loop
G Staff, D Biberg, T Vanvik, N Hoyer, J Nossen, H Holm, PS Johansson
BHR International Conference on Multiphase Production Technology, BHR-2015-G4, 2015
The parareal-in-time algorithm: Basics, stability analysis and more
Y Maday, E Rønquist, GA Staff
Staff Ph. D. thesis)[Google Scholar], 653-663, 2006
Order optimal preconditioners for fully implicit Runge‐Kutta schemes applied to the bidomain equations
TK Nilssen, GA Staff, KA Mardal
Numerical Methods for Partial Differential Equations 27 (5), 1290-1312, 2011
Pressure drop in low liquid loading flows-the effect of a thin liquid film on the pipe wall
D Biberg, C Lawrence, G Staff, H Holm
18th International Conference on Multiphase Production Technology, 2017
Order optimal preconditioners for implicit Runge-Kutta schemes applied to parabolic PDE’s. Simula Research Laboratory
KA Mardal, TK Nilssen, GA Staff
Research Report 08–2005. URL, 0
Liquid accumulation and removal in transient three-phase flow with low liquid loading
G Staff, H Holm
BHR North American Conference on Multiphase Production Technology, BHR-2016-033, 2016
Convergence and Stability of the Parareal Algorithm
G Staff
Master's thesis, Norwegian University of Science and Technology, Trondheim …, 2003
The parareal algorithm
GA Staff
Science And Technology 60 (2), 173-184, 2003
A statistical model for the average volume fraction profile through the mixing zone in turbulent stratified gas–liquid flow
R Skartlien, B Hu, TL Palmer, G Staff, E Sollum
International journal of multiphase flow 59, 160-172, 2014
Numerical computation of initial value problems originated from partial differential equations
GA Staff
PhD thesis, PhD thesis, Faculty of Mathematics and Natural Sciences …, 2006
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