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Helmer André Friis

Observed names: Friis, Helmer André, H A Friis, H. A. Friis, H.A. Friis, HELMER ANDRÉ FRIIS, Helmer A. FRIIS, Helmer A. Friis, Helmer Andre Friis
Institution: Sekal (Norway)
Observed institutions: University of Oslo, NORCE Research AS, Sekal (Norway), International Research Institute of Stavanger, University of Bergen, University of Stavanger
ORCID: 0000-0003-2462-1381
Observed ORCID: 0000-0003-2462-1381
OpenAlex ID: A5007586511
Modeling of Ion-Exchange and Solubility in Low Salinity Water flooding
2012 · Aruoture Omekeh, Helmer André Friis, et al. · SPE Improved Oil Recovery Conference · 110
A Steady-State Upscaling Approach for Immiscible Two-Phase Flow
2003 · G. A. Virnovsky, H. A. Friis, et al. · Transport in Porous Media · 92
A method for computing unsteady fully nonlinear interfacial waves
1997 · JOHN GRUE, HELMER ANDRÉ FRIIS, et al. · Journal of Fluid Mechanics · 71
A family of MPFA finite-volume schemes with full pressure support for the general tensor pressure equation on cell-centered triangular grids
2010 · Helmer A. Friis, Michael G. Edwards · Journal of Computational Physics · 70
Symmetric Positive Definite Flux-Continuous Full-Tensor Finite-Volume Schemes on Unstructured Cell-Centered Triangular Grids
2008 · Helmer André Friis, Michael G. Edwards, et al. · SIAM Journal on Scientific Computing · 66
Global weak solutions for a viscous liquid–gas model with transition to single-phase gas flow and vacuum
2008 · Steinar Evje, Tore Flåtten, et al. · Nonlinear Analysis · 65
A level set approach to Ostwald ripening of trapped gas bubbles in porous media
2022 · Deepak Singh, Helmer André Friis, et al. · Transport in Porous Media · 35
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A locally conservative multiphase level set method for capillary-controlled displacements in porous media
2020 · Espen Jettestuen, Helmer André Friis, et al. · Journal of Computational Physics · 35
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Footprints of spontaneous fluid redistribution on capillary pressure in porous rock
2017 · Johan Olav Helland, Helmer André Friis, et al. · Geophysical Research Letters · 34
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Pore-scale Ostwald ripening of gas bubbles in the presence of oil and water in porous media
2023 · Deepak Singh, Helmer André Friis, et al. · Journal of Colloid and Interface Science · 27
Global Weak Solutions for a Gas-Liquid Model with External Forces and General Pressure Law
2011 · Helmer André Friis, Steinar Evje · SIAM Journal on Applied Mathematics · 26
A multiphase level set approach to motion of disconnected fluid ganglia during capillary-dominated three-phase flow in porous media: Numerical validation and applications
2019 · Johan Olav Helland, Janne Pedersen, et al. · Chemical Engineering Science · 24
Ostwald ripening of gas bubbles in porous media: Impact of pore geometry and spatial bubble distribution
2024 · Deepak Singh, Helmer André Friis, et al. · Advances in Water Resources · 21
Numerical Treatment of Two-Phase Flow in Capillary Heterogeneous Porous Media by Finite-Volume Approximations
2012 · H. A. Friis, S. Evje · International Journal of Numerical Analysis and Modeling · 15
Application of Fourier transform to the second order 2D wave diffraction problem
1990 · Helmer André Friis, John Grue, et al. · NORA - Norwegian Open Research Archives · 14
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Pore-Scale Level Set Simulations of Capillary-Controlled Displacement with Adaptive Mesh Refinement
2019 · Helmer André Friis, Janne Pedersen, et al. · Transport in Porous Media · 13
Well-posedness of a Compressible Gas-liquid Model with a Friction Term Important for Well Control Operations
2011 · Helmer André Friis, Steinar Evje · SIAM Journal on Applied Mathematics · 13
Ripening of Capillary-Trapped CO 2 Ganglia Surrounded by Oil and Water at the Pore Scale: Impact of Reservoir Pressure and Wettability
2024 · Deepak Singh, Helmer André Friis, et al. · Energy & Fuels · 12
Up-scaling of Multiphase Flow Functions Using a Steady State Flow Model
1999 · G. A. Virnovsky, H. A. Friis, et al. · SPE Annual Technical Conference and Exhibition · 12
A Model for Low Salinity Flooding Experiments: Dissolution and Ion Exchange
2015 · Aruoture Voke Omekeh, Helmer Andre Friis, et al. · Journal of Porous Media · 11
Computable scalar fields: A basis for PDE software
2005 · Magne Haveraaen, Helmer André Friis, et al. · The Journal of Logic and Algebraic Programming · 11
Impact of spatially varying hydraulic conductivities on tumor interstitial fluid pressure distribution
2019 · Seyedeh Shahrzad Rasouli, Ingunn Westvik Jolma, et al. · Informatics in Medicine Unlocked · 10
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A Novel Method for Locally Updating an Earth Model While Geosteering
2017 · Erich Suter, Eric Cayeux, et al. · International Journal of Geosciences · 10
Prediction of Optimal Production Time during Underground CH 4 Storage with Cushion CO 2 Using Reservoir Simulations and Artificial Neural Networks
2023 · Johan Olav Helland, Helmer André Friis, et al. · Energy & Fuels · 9
A Discrete‐Domain Approach to Three‐Phase Hysteresis in Porous Media
2021 · Johan Olav Helland, Espen Jettestuen, et al. · Water Resources Research · 9
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Works count: 50
Citation count: 872
H-index: 14
I10-index: 23
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