Per Arne Rikvold

Porous Media Laboratory SFF

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Email p.a.rikvold@fys.uio.no

Phone +47 22856485

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Visiting address Sem Sælands vei 24 0316 OSLO

Postal address Postboks 1048, Blindern 0316 OSLO

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Academic interests

My research focuses on applications of equilibrium and non-equilibrium computational statistical mechanics to a wide range of problems. These include surface structures of porous hydrogels, structure and dynamics of interfaces driven through a medium by an external force, electrochemical adsorption processes, dynamics of magnetization reversal in thin films, network-theoretical analysis of electrical power grids, and topics in evolutionary ecology. Full publication list, going back to 1977.

Background

I joined PoreLab at The University of Oslo as a Researcher in 2018, after serving as Professor of Physics at Florida State University in Tallahassee, Florida, since 1987. I received my M.Sc. (Cand. Real.) in Physics from the University of Oslo in 1976. Subsequently, I spent two years as a Japanese Government research student at Kyushu University in Fukuoka, Japan. After further stays at the University of Oslo, University of Geneva in Switzerland, and Kernforschungsanlage Jülich in Germany, I received my Ph.D. in Physics from Temple University in Philadelphia, Pennsylvania, in 1983. While at Florida State University, I served several periods a Visiting Professor at The University of Tokyo, Kyoto Univeristy, McGill University, and Virginia Tech. Personal web page.

Awards

2001: Elected Fellow of The American Physical Society (APS). For innovative and significant computational studies in statistical and condensed-matter physics, materials science, and electrochemistry, including development of novel algorithms to study the decay of metastable phases of matter.
2004: Elected Foreign Member of The Norwegian Academy of Science and Letters.
2010: Elected Fellow of The American Association for the Advancement of Science (AAAS). For distinguished contributions to computational statistical physics and its interdisciplinary applications in condensed-matter and materials physics, electrochemistry, computer science, biology, and engineering.
2013: Selected as an Outstanding Referee for the Journals of the American Physical Society (APS).

Positions held

2010-18: Distinguished Research Professor, Florida State University.
2004-18: The James G. Skofronick Professor of Physics, Florida State University.
1992-2004: Professor of Physics, Florida State University.
1987-92: Associate Professor of Physics, Florida State University.
1985-87: Senior Research Chemist, ARCO Chemical Company, Newtown Square, PA.
1983-85: Postdoctoral Research Associate, Department of Mechanical Engineering, State University of New York at Stony Brook, Stony Brook, NY.
1981-83: Research Council of Norway Predoctoral Research Fellow, Department of Physics, Temple University, Philadelphia, PA.
1978-81: Predoctoral Research Associate, Department of Physics, University of Oslo, Norway.
1976-78: Japanese Ministry of Education Foreign Graduate Fellow, Department of Physics, Kyushu University, Fukuoka, Japan.

Tags: Statistical mechanics, Computational Physics, Condensed matter physics, Porous media, Magnetic systems, Network theory, Ecology and Evolution

Gurfinkel, Alexander Jacob & Rikvold, Per Arne (2020). Absorbing random walks interpolating between centrality measures on complex networks. Physical review. E. ISSN 2470-0045. 101(1) . doi: 10.1103/PhysRevE.101.012302 Full text in Research Archive.
Silva, Daniel & Rikvold, Per Arne (2019). Complete catalog of ground-state diagrams for the general three-state lattice-gas model with nearest-neighbor interactions on a square lattice. Physical Chemistry, Chemical Physics - PCCP. ISSN 1463-9076. 21, s 6216- 6223 . doi: 10.1039/c8cp07721e Full text in Research Archive.
Murase, Yohsuke & Rikvold, Per Arne (2018). Conservation of population size is required for self-organized criticality in evolution models. New Journal of Physics. ISSN 1367-2630. 20 . doi: 10.1088/1367-2630/aad861
Nishino, Masamichi; Rikvold, Per Arne; Omand, Conor & Miyashita, Seiji (2018). Multistability in an unusual phase diagram induced by the competition between antiferromagnetic-like short-range and ferromagnetic-like long-range interactions. Physical review B (PRB). ISSN 2469-9950. 98(14), s 144402-1- 144402-13 . doi: 10.1103/PhysRevB.98.144402 Full text in Research Archive.

Brodin, Joachim Falck; Måløy, Knut Jørgen; Moura, Marcel; Toussaint, Renaud & Rikvold, Per Arne (2020). An experimental study of the interplay between viscous, capillary and gravitational forces in two-phase flow in a three-dimensional porous medium. Show summary
We study the interplay between viscous, capillary and gravitational forces in two-phase flow in a threedimensional porous medium, with the use of an optical scanner based on index-matched medium and fluorescent fluids. A more viscous, denser, fluid is injected into a less viscous, less dense fluid in a 3D porous medium, comprised of randomly packed glass beads of uniform size. We tune the injection rate over 10 experiments. Experience from the 2D scenario suggests that with a slow injection rate capillary and gravitational forces will dominate, and we should observe an unstable displacement and fingering. Conversely, with a high injection rate, viscous forces will dominate, leading to a more stable displacement and a narrower invasion front. How do the 2D findings hold up in the 3D scenario? We confirm the qualitative findings from the 2D experiments and establish a clear regime change, from unstable to stable displacement. We seek to derive a dimensionless number to quantify the relevant balance of forces and consider this number in relation to the invasion pattern. We characterize the invasion by Minkowski-functionals and fractal dimensions and seek relations between the found geometries and the derived dimensionless numbers.
Måløy, Knut Jørgen; Brodin, Joachim Falck; Rikvold, Per Arne; Moura, Marcel; Toussaint, Renaud; Schaefer, Gerhard & Flekkøy, Eirik Grude (2020). Drainage in porous media under influence of a gravitational field.
Rikvold, Per Arne; Brodin, Joachim Falck; Moura, Marcel Nascimento de & Måløy, Knut Jørgen (2020). Visualization of Two-phase Flow in a Three-dimensional Porous Medium.
Rikvold, Per Arne; Brodin, Joachim Falck; Moura, Marcel Nascimento de & Måløy, Knut Jørgen (2020). Visualization of Two-phase Flow in a Three-dimensional Porous Medium.
Rikvold, Per Arne & Gurfinkel, Alexander Jacob (2020). Centrality Reach and Grasp: Atenuation of Influence Flows in Parametrized Centrality Measures on Complex Networks.
Rikvold, Per Arne & Gurfinkel, Aleks (2019). Interpolating between centrality measures on complex networks using absorbing Markov chains.
Rikvold, Per Arne & Gurfinkel, Aleks (2019). Random-walk based interpolations between centrality measures on complex networks.
Rikvold, Per Arne & Gurfinkel, Aleks (2019). Random-walk based interpolations between centrality measures on complex networks.

Published Jan. 10, 2019 7:41 AM - Last modified Jan. 11, 2019 1:57 PM

Per Arne Rikvold

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