Featured publications

M. Moura, K. J. Måløy, E. G. Flekkøy, and R. Toussaint. “Verification of a Dynamic Scaling for the Pair Correlation Function during the Slow Drainage of a Porous Medium“. This paper has just been published by PRL (Physical Review Letters). In this paper we have experimentally verified a 30 years long prediction about how the relative probability of invasion of a pore in a porous medium varies with space and time. When a material full of pores (like a porous rock or a sponge) is soaked in a fluid and another fluid is forced into it, an interesting dynamics arises in which the invading fluid sequentially displaces the other one out of the pores. In the late 80s a group of researchers employed computer simulations to quantify the relative probabilities of such pore displacements, making numerical predictions about how this probability varies with space and time. – By using synthetic porous samples and modern image analysis techniques, we have been able to finally verify those predictions experimentally and to give a full theoretical explanation for the observations. The increased understanding of this kind of phenomena is relevant for many fields in which one fluid displaces another from a porous network, such as CO2 storage in subsea rocks and the remediation of contaminated soils.


M. MouraK. J. Måløy and R. Toussaint. Critical behavior in porous media flow 2017 EPL (Europhysics Letters)Volume 118 The article has been published by EPL (Europhysics Letters). This was project in which we have addressed the statistics of burst invasion events in porous media and also the power spectrum of pressure fluctuations associated with the bursts. The illustration shows the flow from left to right, during approx 82 h. Bursts color coded by their size normalized by a typical pore area (top) and randomly (bottom). The vast blue areas in the top image contain many smaller bursts (detail)


Poster: Fluid Topology in Drainage and Imbibition: Pore Scale Imaging by Synchrotron Tomography. Hamid H. Khanamiri, Ole Torsæter, Georg J. B. Voss.

Recent articles

A significant number of these articles have been in highly-cited peer-reviewed international journals such as Physical Review Letters, Europhysics Letters, Journal Of Non-Equilibrium Thermodynamics and Journal Of Petroleum Science And Engineering. Many of the articles have high citation indices and journal impact factors reflect well the published work of the centre.

  1. Rurali, Riccardo; Cartoixà, Xavier; Bedeaux, Dick; Kjelstrup, Signe; Colombo, Luciano (2018). The Thermal Boundary Resistance at Semiconductor Interfaces: A Critical Appraisal of the Onsager vs Kapitza Formalisms. Doi: 10.1039/C8CP02104J. Phys. Chem. Chem. Phys.
  2. Pradhan, Srutarshi; Hansen, Alex; Ray, Purusattam. A Renormalization Group Procedure for Fiber Bundle Models.  Front. Phys., 02 July 2018. Doi:
  3. Flekkøy EG, Moura M and Måløy KJ (2018) Mechanisms of the Flying Chain Fountain. Front. Phys. 6:84. doi: 10.3389/fphy.2018.00084
  4. Bedeaux, Dick; Kjelstrup, Signe. Hill’s nano-thermodynamics is equivalent with Gibbs’ thermodynamics for surfaces of constant curvatures. Chemical Physics Letters. Volume 707, (2018). Doi:
  5. Gjennestad, Magnus Aashammer; Aursand, Eskil; Magnanelli, Elisa; Pharoah, John George. Performance analysis of heat and energy recovery ventilators using exergy analysis and nonequilibrium thermodynamics (2018). Energy and Buildings. vol. 170. Doi:
  6. Gjennestad, Magnus Aashammer; Vassvik, Morten; Kjelstrup, Signe; Hansen, Alex. Stable and efficient time integration of a dynamic pore network model for two-phase flow in porous media  (2018). Frontiers in Physics. vol. 6. Doi:
  7. Mikkelsen A., Khobaib K., Eriksen F.K. Måløy K.J., and Rozynek Z. Particle-covered drops in electric fields: drop deformation and surface particle organization. Soft Matter, DOI:10.1039/c8sm00915e (2018)
  8. Xu L, Marks B, Toussaint R, Flekkøy EG and Måløy KJ (2018) Dispersion in Fractures With Ramified Dissolution Patterns. Front. Phys. 6:29. doi: 10.3389/fphy.2018.00029
  9. Eriksen F.K., Toussaint R., Turquet A.L., Måløy K.J., and Flekkøy E.G. , Pressure evolution and deformation of confined granular media during pneumatic fracturing. Phys. Rev. E. 97, 012908, (2018)
  10. Eriksen J.A., Toussaint R., Måløy K.J., Flekkøy E., Galland O., Sandnes B., Pattern formation of frictional fingers in a gravitational potential. Phys. Rev. Fluids 3, 013801, (2018)
  11. Moura M., Måløy K.J., Flekkøy E., and Toussaint R., Verification of a dynamic scaling for pair correlation function during the slow drainage of a porous medium. Phys. Rev. Lett. 119, 154503 (2017)
  12. Khanamiri H. H, Torsæter O., Fluid Topology in Pore Scale Two‐Phase Flow Imaged by Synchrotron X‐ray MicrotomographyWater Resources Research. (2018).
  13. Marks B., Eriksen J.A., Dumazer G., Sandnes B. and Måløy K.J., Size segregation of intruders in perpetual granular avalanches. J. Fluid Mech. 825, 550, (2017)
  14. Eriksen, Fredrik Kvalheim; Toussaint, Renaud; Turquet, Antoine Léo; Måløy, Knut Jørgen & Flekkøy, Eirik Grude (2017). Pneumatic fractures in confined granular media. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics.  ISSN 1063-651X. . doi: 10.1103/PhysRevE.95.062901
  15. Flekkøy, Eirik Grude; Pride, Steven R. & Toussaint, Renaud (2017). Onsager symmetry from mesoscopic time reversibility and the hydrodynamic dispersion tensor for coarse-grained systems. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics.  ISSN 1063-651X.  95(2) . doi:10.1103/PhysRevE.95.022136
  16. Pride, Steven R; Vasco, Donald W; Flekkøy, Eirik Grude & Holtzman, Ran (2017). Dispersive transport and symmetry of the dispersion tensor in porous media. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics.  ISSN 1063-651X.  95(4) . doi:10.1103/PhysRevE.95.043103
  17. Moura, Marcel; Måløy, Knut Jørgen & Toussaint, Renaud (2017). Critical behavior in porous media flow. Europhysics letters.  ISSN 0295-5075.  118(1) . doi:10.1209/0295-5075/118/14004
  18. Maria Barragan and Signe Kjelstrup, Thermo-osmosis in Membrane Systems: A reviewNon-Equilib. Thermodyn (2017). doi: 10.1515/jnet-016-0088
  19. M. Rubi, A. Lervik. D. Bedeaux, and S. Kjelstrup, Entropy Facilitated Active TransportJ. Chem. Phys. 146 (2017) 185101; doi:10.1063/1.4982799
  20. Savani, M.H. Waage, M. Børset, S. Kjelstrup, Ø. Wilhelmsen, Harnessing thermoelectric power from transient heat sources: Waste heat recovery from silicon production. Energy Conversion and Management (2017). DOI:10.1016/j.enconman.2017.01.058
  21. Roest, P. Ballone, D. Bedeaux, S. Kjelstrup, Molecular Dynamics Simulations of Metal/Molten Alkali Carbonate Interfaces, J. Phys. Chem. C. (2017) DOI: 10.1021/acs.jpcc.7b02842

Selected articles before center launch

  1. Isha Savani, Dick Bedeaux, Signe Kjelstrup, Morten Vassvik, Alex Hansen, Santanu Sinha, Ensemble Distribution for Immiscible Two-Phase Flow in Two-Dimensional Networks,  Physical review E 02/2017; 95(2). doi:10.1103/PhysRevE.95.023116
  2. Dumazer G., Sandnes B, Ayaz M., Måløy K.J., Flekkøy E., Frictional Fluid Dynamics and Plug Formation in Multiphase Millifluidic Flow, Phys. Rev. Lett., 117, 028002 (2016). doi:10.1103/PhysRevLett.117.028002
  3. Riccardo Rurali, Luciano Colombo, Xavier Cartoixa, Øivind Wilhelmsen, Thuat T. Trinh, Dick Bedeaux, and Signe Kjelstrup. Heat transport through a solid-solid junction: the interface as an autonomous thermodynamic system, Chem. Chem. Phys. (2016). doi:10.1039/C6CP01872F
  4. Elisa Magnanelli, Øivind Wilhelmsen, Mario Acquarone, Lars P. Folkow, Signe Kjelstrup. The efficiency of a reindeer nose: The Nasal Geometry of the Reindeer Gives Energy-Efficient Respiration, Non-Eq. Thermodyn42 (2016) 59-78 doi: 10.1515/jnet-2016-0038
  5. Øivind Wilhelmsen, Thuat T. Trinh, Anders Lervik, Vijay Kumar Badam, Signe Kjelstrup, and Dick Bedeaux. Coherent description of transport across the water interface: From nanodroplets to climate modelsRev. E 93 002800 (2016). doi:10.1103/PhysRevE.93.032801
  6. Luuc Keulen, L.V. van der Ham, J. Haanemaijer, N.J.M. Kuipers, Thijs Vlugt, S. Kjelstrup, Membrane distillation against a pressure differenceMembr. November 2016 · Journal of Membrane Science 11/2016; 524:151-162. doi:10.1016/j.memsci.2016.10.054
  7. M. Niebling, R. Toussaint, E.G. Flekkøy and K.J. Måløy, Dynamic aerofracture or hydrofracture of dense granular packing: pressure and viscosity control of the fracture patterns. Phys. Rev. E 86 (2015)
  8. J.A. Eriksen and E.G. Flekkøy Numerical approach to frictional fingers, Phys. Rev. E 92 (2015)
  9. Moura M, Fiorentino E.-A., Måløy K.J., Schafer G., and Toussaint R., Impact of sample geometry on the measurement of pressure-saturation curves: experiments and simulations. Water Resour. Res., 51, doi:10.1002/ 2015WR017196 (2015).
  10. Hosseinzade Khanamiri, Hamid; Torsæter, Ole; Stensen, Jan Åge: Effect of calcium in pore scale oil trapping by low-salinity water and surfactant enhanced oil recovery at strongly water-wet conditions: in situ imaging by X-ray microtomography. Energy & Fuels 2016;Volume 30.(10) s. 8114-8124. doi10.1021/acs.energyfuels.6b01236
  11. Li, Shidong; Genys, Mindaugas; Kun, Wang; Torsæter, Ole: “Experimental Study of Wettability Alteration during Nanofluid Enhanced Oil Recovery Process and Its Effect on Oil Recovery”. SPE Reservoir Characterization and Simulation Conference and Exhibition; 2015-09-14 – 2015-09-16.
  12. Zlotorowicz, Kaushik. Jayasayeed, P.I. Dahl, M. S. Thomassen and S. Kjelstrup, Tailored Porosities of the Cathode Layer for Improved Polymer Electrolyte Fuel Cells, J. Power Sources, 287 (2015) 472-477. DOI:10.1016/j.jpowsour.2015.04.079
  13. Hendraningrat, Luky; Torsæter, Ole: “Effects of the initial rock wettability on silica-based nanofluid-enhanced oil recovery processes at reservoir temperatures”. Energy & Fuels, 2014; Volume 28.(10) s. 6228-6241. doi: 10.1021/ef5014049
  14. M. Erpelding, S. Sinha, K.T. Tallakstad, A. Hansen, E.G. Flekkøy, and K.J. Måløy, History-independence of steady state in simultaneous two-phase flow through 2D porous media, Phys Rev. E. 88, 053004 (2013). doi: 10.1103
  15. L. Laurson, X. Illa, S. Santucci, K.T. Tallakstad, K.J. Måløy, and M. Allava, The average avalanche shape: universality beyond the mean field. Nat. Commun. 4:2927 doi: 10.1038/ncomms3927 (2013)
  16. K.T. Tallakstad, R. Toussaint, S. Santucci, K.J. Måløy, Non-Gaussian Nature of Fracture and Survival of Fat-Tail Exponenets, Phys. Rev. Lett, 110, 145501 (2013). doi:10.1103
  17. Farokhpoor, Raheleh; Bjørkvik, Bård Johan Arnt; Lindeberg, Erik Gøsta Brun; Torsæter, Ole: “Wettability behavior of CO2 at storage conditions”. International Journal of Greenhouse Gas Control 2013; Volume 12. s.18-25. doi:
  18. Afrapoli, Mehdi Shabani; Valipour Shokouhi, Samad; Torsæter, Ole.: “Analysis of Microscopic Displacement Mechanisms of a MIOR Process in Porous Media with Different Wettability”. Transport in Porous Media 2012 ;Volume 93.(3) s. 705-719. doi:
  19. B. Sandnes, E.G. Flekkøy, H.A. Knudsen, K.J. Måløy, and H. See Patterns and flow in frictional fluid dynamics, Nature Comm. 2 doi:10.1038/ncomms1289 (2011)
  20. O.Aursjø, H.A. Knudsen, E.G. Flekkøy, and K.J. Måløy, Oscillation induced displacement pattern in a two-dimensional porous medium: A lattice Boltzmann study, Phys. Rev. E. 82, 026305, (2010). doi:10.1103
  21. Kjelstrup, M-O Coppens, J. G. Pharoah and P. Pfeifer, Nature-Inspired Energy- and Material-Efficient Design of a Polymer Electrolyte Membrane Fuel CellEnergy & Fuels, 24 (2010) 5097-5108. DOI:10.1021/ef100610w
  22. K.T. Tallakstad, G. Løvoll, H. A. Knudsen, T. Ramstad, E.G. Flekkøy and K.J. Måløy, Steady-state simultaneous two-phase flow in porous media: An experimental study, Phys. Rev. E. 80, 036308 (2009).
  23. K.T. Tallakstad, H. A. Knnudsen, T. Ramstad, G. Løvoll, K. J. Måløy, R. Toussaint, and E. G. Flekkøy. Steady-State Two-Phase Flow in Porous Media: Statistics and Transport Properties. Phys. Rev. Lett. 102, 074502, (2009). doi:
  24. J. L. Vinningland, Ø. Johnsen, E.G. Flekkøy, R. Toussaint and K.J. Måløy, Granular Rayleigh- Taylor instability: experiment and simulation, Phys. Rev. Lett. 99 048001 (2007). doi:10.1103
  25. Kowalewski, E. ,Rueslåtten, I. , Steen, K.H. , Bodtker, G. , Torsæter, O. : “Microbial improved oil recovery-bacterial induced wettability and interfacial tension effects on oil production”, Journal of Petroleum Science and Engineering , 52 (2006) 275-286. doi:
  26. R. Tuossaint, G. Løvoll, Y. Meheust, K. J. Måløy, and J. Schmittbuhl, Influence of pore-scale disorder on viscous fingering during drainage. Europhys Lett. 71, 583, (2005). doi: 10.1209/epl/i2005-10136-9
  27. G. Løvoll, Y. Meheust, R. Toussaint, J. Schmittbuhl, and K. J. Måløy. Growth activity during fingering in a porous Hele-Shaw cell. Phys. Rev. E 70, 026301 (2004)
  28. Kowalewski, E., Holt, T. and Torsæter, O.: ”Wettability alterations due to an oil soluble additive”, Journal of Petroleum Science and Engineering 33 (2002), 19-28. doi:
  29. Y. Meheust, G. Løvoll, K. J. Måløy, and J. Schmittbuhl, Gravity stabilized viscous fingering. Phys. Rev. E. 66, 051603 (2002)
  30. K. J. Måløy, Liv Furuberg, J. Feder and T. Jøssang. Dynamics of Slow Drainage in Porous Media. Phys. Rev. Lett. 68, 2161-2164, (1992)
  31. K. J. Måløy, Jens. Feder and T. Jøssang. Viscous Fingering Fractals in Porous Media. Phys. Rev. Lett. 55, 2688-2691, (1985). doi: 10.1103/PhysRevLett.55.2688
Scroll Up