Dr Bjornar Sandnes

Associate Professor

Chemical Engineering

+44 (0) 1792 602634

b.sandnes@swansea.ac.uk

Office - 409
Fourth Floor
Engineering North
Bay Campus

Research Links

https://orcid.org/0000-0002-4854-5857

About

My research focuses on the surprising variety of flow patterns we discover in multiphase, granular, and complex fluid flows. We study how large-scale flow patterns emerge from a combination of the microstructure of the fluid, and the viscous, capillary, frictional and gravitational forces acting on the system. Our results provide explanations for naturally occurring phenomena in geophysical flows, and helps optimise engineered processes such as soil remediation, oil and gas recovery, and carbond dioxide cature and storage.

Read more on the Complex Flow Lab webpage.

Career Highlights

Research

Complex Fluids Research Group

Chemical Engineering Research

Publications

Research Highlights

Ozturk, D. & Sandnes, B. (2019). A STUDY OF THREE-PHASE FRACTURING IN GRANULAR MEDIA USING HIGH-SPEED IMAGING. Journal of Porous Media, 22(8), 987-1000.
https://doi.org/10.1615/jpormedia.2019026005, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa52472
Olsen, K., Flekkøy, E., Angheluta, L., Campbell, J., Måløy, K., & Sandnes, B. (2019). Geometric universality and anomalous diffusion in frictional fingers. New Journal of Physics, 21(6), 063020
https://doi.org/10.1088/1367-2630/ab25bf, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa50586
Eriksen, J., Toussaint, R., Måløy, K., Flekkøy, E., Galland, O., & Sandnes, B. (2018). Pattern formation of frictional fingers in a gravitational potential. Physical Review Fluids, 3(1)
https://doi.org/10.1103/physrevfluids.3.013801, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa37942
Campbell, J., Ozturk, D., & Sandnes, B. (2017). Gas-Driven Fracturing of Saturated Granular Media. Physical Review Applied, 8(6)
https://doi.org/10.1103/physrevapplied.8.064029, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa36781
Dumazer, G., Sandnes, B., Ayaz, M., Måløy, K., Flekkøy, E., & Sandnes, B. (2017). Self-Structuring of Granular material under Capillary Bulldozing. EPJ Web of Conferences, 140, 09016
https://doi.org/10.1051/epjconf/201714009016, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa34575
Toussaint, R., Sandnes, B., Koehn, D., Szymczak, P., Aharonov, E., & Sandnes, B. (Eds.). (2017). Flow and Transformations in Porous Media. Frontiers Media.
https://doi.org/10.3389/978-2-88945-077-0, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa31881
http://www.frontiersin.org/books/Flow_and_Transformations_in_Porous_Media/1118
Marks, B., Eriksen, J., Dumazer, G., Sandnes, B., Måløy, K., & Sandnes, B. (2017). Size segregation of intruders in perpetual granular avalanches. Journal of Fluid Mechanics, 825, 502-514.
https://doi.org/10.1017/jfm.2017.419, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa34155
Sandnes, B., Koehn, D., Toussaint, R., Szymczak, P., Aharonov, E., & Sandnes, B. (2016). Editorial: Flow and Transformation in Porous Media. Frontiers in Physics, 4
https://doi.org/10.3389/fphy.2016.00042, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa30611
Dumazer, G., Sandnes, B., Ayaz, M., Måløy, K., & Flekkøy, E. (2016). Frictional Fluid Dynamics and Plug Formation in Multiphase Millifluidic Flow. Physical Review Letters, 117(2)
https://doi.org/10.1103/PhysRevLett.117.028002, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa28884
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.028002
Eriksen, J., Marks, B., Sandnes, B., Toussaint, R., & Sandnes, B. (2015). Bubbles breaking the wall: Two-dimensional stress and stability analysis. Physical Review E, 91(5)
https://doi.org/10.1103/PhysRevE.91.052204, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21343
http://journals.aps.org/pre/abstract/10.1103/PhysRevE.91.052204
Marks, B., Sandnes, B., Dumazer, G., Eriksen, J., MÃ¥lÃ¸y, K., & Sandnes, B. (2015). Compaction of granular material inside confined geometries. Frontiers in Physics, 3
https://doi.org/10.3389/fphy.2015.00041, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21489
Eriksen, J., Toussaint, R., Måløy, K., Flekkøy, E., & Sandnes, B. (2015). Numerical approach to frictional fingers. Physical Review E, 92(3)
https://doi.org/10.1103/PhysRevE.92.032203, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa23521
http://journals.aps.org/pre/abstract/10.1103/PhysRevE.92.032203
Oppenheimer, J., Rust, A., Cashman, K., & Sandnes, B. (2015). Gas migration regimes and outgassing in particle-rich suspensions. Frontiers in Physics, 3
https://doi.org/10.3389/fphy.2015.00060, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa22959
http://journal.frontiersin.org/article/10.3389/fphy.2015.00060/abstract
Sandnes, B., Flekkoy, E., Maloy, K., & Eriksen, J. (2012). The shifting shapes of frictional fluids. Rev. Cub. Fis., 29(1E23)
SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21736
Eriksen, J., Sandnes, B., Maloy, K., & Flekkoy, E. (2013). Modelling stick-slip dynamics in frictional fluids. In Geophysical Research Abstracts 15, EGU2013-14040
SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21350
Eriksen, J., Sandnes, B., Cueto-Felgueroso , L., & Juanes, R. (2013). Stability of Flow in Dense Suspensions. In AGU Fall Meeting, San Fransisco, USA, 2013
SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21349
Oppenheimer, J., Cashman, K., Rust, A., & Sandnes, B. (2014). How do crystal-rich magmas outgas?. In Geophysical Research Abstracts 16, EGU2014
SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21348
Eriksen, J., Sandnes, B., Toussaint, R., Maloy, K., & Flekkoy, E. (2014). Gravity Induced Ordering of Frictional Fingers. In Geophysical Research Abstracts 16, EGU2014-14715.
SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21347
Campbell, J. & Sandnes, B. (2015). Three-phase fracturing in granular material. In Geophysical research Abstracts, EGU2015
SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21346
Sandnes, B., Flekkøy, E., Knudsen, H., Måløy, K., See, H., & Sandnes, B. (2011). Patterns and flow in frictional fluid dynamics. Nature Communications, 2, 288
https://doi.org/10.1038/ncomms1289, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13096
Smith, B., Inglis, D., Sandnes, B., Rabeau, J., Zvyagin, A., Gruber, D., Noble, C., Vogel, R., Ōsawa, E., & Plakhotnik, T. (2009). Five-Nanometer Diamond with Luminescent Nitrogen-Vacancy Defect Centers. Small, 5(14), 1649-1653.
https://doi.org/10.1002/smll.200801802, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13097
Kelf, T., Gosnell, M., Sandnes, B., Guller, A., Shekhter, A., & Zvyagin, A. (2012). Scar tissue classification using nonlinear optical microscopy and discriminant analysis. Journal of Biophotonics, 5(2), 159-167.
https://doi.org/10.1002/jbio.201100075, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13098
Sandnes, B., Kelf, T., Liu, H., Zvyagin, A., & Sandnes, B. (2011). Retroemission by a glass bead monolayer for high-sensitivity, long-range imaging of upconverting phosphors. Optics Letters, 36(15), 3009-3011.
https://doi.org/10.1364/ol.36.003009, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13099
Sandnes, B. (2012). Stick slip displacement of confined granular mixtures: Bubble expansion. The European Physical Journal Special Topics, 204(1), 19
https://doi.org/10.1140/epjst/e2012-01549-7, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13100
Sandnes, B. (2011). Laser-induced modification of the patellar ligament tissue: comparative study of structural and optical changes. Lasers in Medical Science, 26(3), 401
https://doi.org/10.1007/s10103-010-0871-0, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13101
Sandnes, B., Molenaar, D., & Sandnes, B. (2009). Emerging Stripe Patterns in Drying Suspension Droplets. Traffic and Granular Flow ’07 (pp. 635Springer
https://doi.org/10.1007/978-3-540-77074-9_70, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13102
Knudsen, H., Sandnes, B., Flekkøy, E., Måløy, K., & Sandnes, B. (2009). Modelling and Simulation of a Maze-Forming Process in Granular-Fluid Systems. Traffic and Granular Flow ’07 (pp. 603Springer
https://doi.org/10.1007/978-3-540-77074-9_65, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13103
Sandnes, B., Knudsen, H., Måløy, K., Flekkøy, E., & Sandnes, B. (2009). Pattern Formation in Slowly Drained Granular-Fluid Systems. Traffic and Granular Flow ’07 (pp. 629Springer
https://doi.org/10.1007/978-3-540-77074-9_69, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13104
Sandnes, B. (2008). The physics and the chemistry of the heat pad. American Journal of Physics, 76(6), 546
https://doi.org/10.1119/1.2830533, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13105
Sandnes, B. (2008). Granular labyrinth structures in confined geometries. Physical Review E, 77(2)
https://doi.org/10.1103/physreve.77.021301, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13106
Sandnes, B., Knudsen, H., Måløy, K., & Flekkøy, E. (2007). Labyrinth Patterns in Confined Granular-Fluid Systems. Physical Review Letters, 99(3), 038001
https://doi.org/10.1103/PhysRevLett.99.038001, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21051
Correas, C., Wright, K., Andreoli, E., Almutairi, Z., Sandnes, B., & Barron, A. (2018). Hydration induced morphological change on proppant surfaces employing a calcium-silicate cement system. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 537, 197-209.
https://doi.org/10.1016/j.colsurfa.2017.10.006, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa35976
Dumazer, G., Sandnes, B., Måløy, K., & Flekkøy, E. (2020). Capillary bulldozing of sedimented granular material confined in a millifluidic tube. Physical Review Fluids, 5(3)
https://doi.org/10.1103/physrevfluids.5.034309, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa53645
Ozturk, D., Morgan, M., & Sandnes, B. (2020). Flow-to-fracture transition and pattern formation in a discontinuous shear thickening fluid. Communications Physics, 3(1)
https://doi.org/10.1038/s42005-020-0382-7, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa54268
Morgan, M., James, D., Barron, A., & Sandnes, B. (2020). Self-similar velocity profiles and mass transport of grains carried by fluid through a confined channel. Physics of Fluids, 32(11), 113309
https://doi.org/10.1063/5.0031155, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa55589
Morgan, M., James, D., Monloubou, M., Olsen, K., & Sandnes, B. (2021). Subdiffusion model for granular discharge in a submerged silo. Physical Review E, 104(4)
https://doi.org/10.1103/physreve.104.044908, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa58506
Campbell, J., Sandnes, B., Flekkøy, E., & Måløy, K. (2022). Dynamics of Dendritic Ice Freezing in Confinement. Crystal Growth and Design, 22(4), 2433-2440.
https://doi.org/10.1021/acs.cgd.1c01488, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa59633
Morgan, M. & Sandnes, B. (2021). From Darcy to Gaussian to fully mobilised grain flow in a confined channel. EPJ Web of Conferences, 249
https://doi.org/10.1051/epjconf/202124903041, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa60829
ZHANG, D., Campbell, J., Eriksen, J., Flekkøy, E., Måløy, K., MacMinn, C., & Sandnes, B. (2023). Frictional fluid instabilities shaped by viscous forces. Nature Communications, 14(1)
https://doi.org/10.1038/s41467-023-38648-6, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa63392
Flekkøy, E., Sandnes, B., & Måløy, K. (2023). Shape of a frictional fluid finger. Physical Review Fluids, 8(11)
https://doi.org/10.1103/physrevfluids.8.114302, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa64685
Holtzman, R., Sandnes, B., Moura, M., Icardi, M., & Planet, R. (2023). Editorial: Nonequilibrium Multiphase and Reactive Flows in Porous and Granular Materials
SU Repository: https://cronfa.swan.ac.uk/Record/cronfa64786
Xiong, Z., Angerman, P., Ellero, M., Sandnes, B., & Seto, R. (2024). Ridge instability in dense suspensions caused by the second normal stress difference. Physics of Fluids, 36(2)
https://doi.org/10.1063/5.0188004, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa65776
Bedding, M., Khatri, N., Nithiarasu, P., Sandnes, B., Egan, P., & Zhao, F. (2024). Data-driven calculation of porous geometry-dependent permeability and fluid-induced wall shear stress within tissue engineering scaffolds. Journal of Engineering Design, 0, 1-15.
https://doi.org/10.1080/09544828.2024.2321224, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa65980
ANGERMAN, P., Kumar, S., Seto, R., Sandnes, B., & Ellero, M. (2024). Microstructural smoothed particle hydrodynamics model and simulations of discontinuous shear-thickening fluids. Physics of Fluids, 36(3)
https://doi.org/10.1063/5.0188444, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa66168

All Research

Journal Articles

Bedding, M., Khatri, N., Nithiarasu, P., Sandnes, B., Egan, P., & Zhao, F. (2024). Data-driven calculation of porous geometry-dependent permeability and fluid-induced wall shear stress within tissue engineering scaffolds. Journal of Engineering Design, 0, 1-15.
https://doi.org/10.1080/09544828.2024.2321224, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa65980
ANGERMAN, P., Kumar, S., Seto, R., Sandnes, B., & Ellero, M. (2024). Microstructural smoothed particle hydrodynamics model and simulations of discontinuous shear-thickening fluids. Physics of Fluids, 36(3)
https://doi.org/10.1063/5.0188444, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa66168
Xiong, Z., Angerman, P., Ellero, M., Sandnes, B., & Seto, R. (2024). Ridge instability in dense suspensions caused by the second normal stress difference. Physics of Fluids, 36(2)
https://doi.org/10.1063/5.0188004, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa65776
Flekkøy, E., Sandnes, B., & Måløy, K. (2023). Shape of a frictional fluid finger. Physical Review Fluids, 8(11)
https://doi.org/10.1103/physrevfluids.8.114302, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa64685
ZHANG, D., Campbell, J., Eriksen, J., Flekkøy, E., Måløy, K., MacMinn, C., & Sandnes, B. (2023). Frictional fluid instabilities shaped by viscous forces. Nature Communications, 14(1)
https://doi.org/10.1038/s41467-023-38648-6, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa63392
Campbell, J., Sandnes, B., Flekkøy, E., & Måløy, K. (2022). Dynamics of Dendritic Ice Freezing in Confinement. Crystal Growth and Design, 22(4), 2433-2440.
https://doi.org/10.1021/acs.cgd.1c01488, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa59633
Morgan, M., James, D., Monloubou, M., Olsen, K., & Sandnes, B. (2021). Subdiffusion model for granular discharge in a submerged silo. Physical Review E, 104(4)
https://doi.org/10.1103/physreve.104.044908, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa58506
Morgan, M. & Sandnes, B. (2021). From Darcy to Gaussian to fully mobilised grain flow in a confined channel. EPJ Web of Conferences, 249
https://doi.org/10.1051/epjconf/202124903041, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa60829
Morgan, M., James, D., Barron, A., & Sandnes, B. (2020). Self-similar velocity profiles and mass transport of grains carried by fluid through a confined channel. Physics of Fluids, 32(11), 113309
https://doi.org/10.1063/5.0031155, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa55589
Ozturk, D., Morgan, M., & Sandnes, B. (2020). Flow-to-fracture transition and pattern formation in a discontinuous shear thickening fluid. Communications Physics, 3(1)
https://doi.org/10.1038/s42005-020-0382-7, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa54268
Dumazer, G., Sandnes, B., Måløy, K., & Flekkøy, E. (2020). Capillary bulldozing of sedimented granular material confined in a millifluidic tube. Physical Review Fluids, 5(3)
https://doi.org/10.1103/physrevfluids.5.034309, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa53645
Ozturk, D. & Sandnes, B. (2019). A STUDY OF THREE-PHASE FRACTURING IN GRANULAR MEDIA USING HIGH-SPEED IMAGING. Journal of Porous Media, 22(8), 987-1000.
https://doi.org/10.1615/jpormedia.2019026005, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa52472
Olsen, K., Flekkøy, E., Angheluta, L., Campbell, J., Måløy, K., & Sandnes, B. (2019). Geometric universality and anomalous diffusion in frictional fingers. New Journal of Physics, 21(6), 063020
https://doi.org/10.1088/1367-2630/ab25bf, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa50586
Correas, C., Wright, K., Andreoli, E., Almutairi, Z., Sandnes, B., & Barron, A. (2018). Hydration induced morphological change on proppant surfaces employing a calcium-silicate cement system. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 537, 197-209.
https://doi.org/10.1016/j.colsurfa.2017.10.006, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa35976
Eriksen, J., Toussaint, R., Måløy, K., Flekkøy, E., Galland, O., & Sandnes, B. (2018). Pattern formation of frictional fingers in a gravitational potential. Physical Review Fluids, 3(1)
https://doi.org/10.1103/physrevfluids.3.013801, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa37942
Dumazer, G., Sandnes, B., Ayaz, M., Måløy, K., Flekkøy, E., & Sandnes, B. (2017). Self-Structuring of Granular material under Capillary Bulldozing. EPJ Web of Conferences, 140, 09016
https://doi.org/10.1051/epjconf/201714009016, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa34575
Campbell, J., Ozturk, D., & Sandnes, B. (2017). Gas-Driven Fracturing of Saturated Granular Media. Physical Review Applied, 8(6)
https://doi.org/10.1103/physrevapplied.8.064029, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa36781
Marks, B., Eriksen, J., Dumazer, G., Sandnes, B., Måløy, K., & Sandnes, B. (2017). Size segregation of intruders in perpetual granular avalanches. Journal of Fluid Mechanics, 825, 502-514.
https://doi.org/10.1017/jfm.2017.419, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa34155
Sandnes, B., Koehn, D., Toussaint, R., Szymczak, P., Aharonov, E., & Sandnes, B. (2016). Editorial: Flow and Transformation in Porous Media. Frontiers in Physics, 4
https://doi.org/10.3389/fphy.2016.00042, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa30611
Dumazer, G., Sandnes, B., Ayaz, M., Måløy, K., & Flekkøy, E. (2016). Frictional Fluid Dynamics and Plug Formation in Multiphase Millifluidic Flow. Physical Review Letters, 117(2)
https://doi.org/10.1103/PhysRevLett.117.028002, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa28884
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.028002
Eriksen, J., Toussaint, R., Måløy, K., Flekkøy, E., & Sandnes, B. (2015). Numerical approach to frictional fingers. Physical Review E, 92(3)
https://doi.org/10.1103/PhysRevE.92.032203, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa23521
http://journals.aps.org/pre/abstract/10.1103/PhysRevE.92.032203
Oppenheimer, J., Rust, A., Cashman, K., & Sandnes, B. (2015). Gas migration regimes and outgassing in particle-rich suspensions. Frontiers in Physics, 3
https://doi.org/10.3389/fphy.2015.00060, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa22959
http://journal.frontiersin.org/article/10.3389/fphy.2015.00060/abstract
Marks, B., Sandnes, B., Dumazer, G., Eriksen, J., MÃ¥lÃ¸y, K., & Sandnes, B. (2015). Compaction of granular material inside confined geometries. Frontiers in Physics, 3
https://doi.org/10.3389/fphy.2015.00041, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21489
Eriksen, J., Marks, B., Sandnes, B., Toussaint, R., & Sandnes, B. (2015). Bubbles breaking the wall: Two-dimensional stress and stability analysis. Physical Review E, 91(5)
https://doi.org/10.1103/PhysRevE.91.052204, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21343
http://journals.aps.org/pre/abstract/10.1103/PhysRevE.91.052204
Kelf, T., Gosnell, M., Sandnes, B., Guller, A., Shekhter, A., & Zvyagin, A. (2012). Scar tissue classification using nonlinear optical microscopy and discriminant analysis. Journal of Biophotonics, 5(2), 159-167.
https://doi.org/10.1002/jbio.201100075, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13098
Sandnes, B. (2012). Stick slip displacement of confined granular mixtures: Bubble expansion. The European Physical Journal Special Topics, 204(1), 19
https://doi.org/10.1140/epjst/e2012-01549-7, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13100
Sandnes, B., Flekkoy, E., Maloy, K., & Eriksen, J. (2012). The shifting shapes of frictional fluids. Rev. Cub. Fis., 29(1E23)
SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21736
Sandnes, B., Flekkøy, E., Knudsen, H., Måløy, K., See, H., & Sandnes, B. (2011). Patterns and flow in frictional fluid dynamics. Nature Communications, 2, 288
https://doi.org/10.1038/ncomms1289, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13096
Sandnes, B., Kelf, T., Liu, H., Zvyagin, A., & Sandnes, B. (2011). Retroemission by a glass bead monolayer for high-sensitivity, long-range imaging of upconverting phosphors. Optics Letters, 36(15), 3009-3011.
https://doi.org/10.1364/ol.36.003009, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13099
Sandnes, B. (2011). Laser-induced modification of the patellar ligament tissue: comparative study of structural and optical changes. Lasers in Medical Science, 26(3), 401
https://doi.org/10.1007/s10103-010-0871-0, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13101
Smith, B., Inglis, D., Sandnes, B., Rabeau, J., Zvyagin, A., Gruber, D., Noble, C., Vogel, R., Ōsawa, E., & Plakhotnik, T. (2009). Five-Nanometer Diamond with Luminescent Nitrogen-Vacancy Defect Centers. Small, 5(14), 1649-1653.
https://doi.org/10.1002/smll.200801802, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13097
Sandnes, B. (2008). The physics and the chemistry of the heat pad. American Journal of Physics, 76(6), 546
https://doi.org/10.1119/1.2830533, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13105
Sandnes, B. (2008). Granular labyrinth structures in confined geometries. Physical Review E, 77(2)
https://doi.org/10.1103/physreve.77.021301, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13106
Sandnes, B., Knudsen, H., Måløy, K., & Flekkøy, E. (2007). Labyrinth Patterns in Confined Granular-Fluid Systems. Physical Review Letters, 99(3), 038001
https://doi.org/10.1103/PhysRevLett.99.038001, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21051

Book Chapters

Sandnes, B., Molenaar, D., & Sandnes, B. (2009). Emerging Stripe Patterns in Drying Suspension Droplets. Traffic and Granular Flow ’07 (pp. 635Springer
https://doi.org/10.1007/978-3-540-77074-9_70, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13102
Knudsen, H., Sandnes, B., Flekkøy, E., Måløy, K., & Sandnes, B. (2009). Modelling and Simulation of a Maze-Forming Process in Granular-Fluid Systems. Traffic and Granular Flow ’07 (pp. 603Springer
https://doi.org/10.1007/978-3-540-77074-9_65, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13103
Sandnes, B., Knudsen, H., Måløy, K., Flekkøy, E., & Sandnes, B. (2009). Pattern Formation in Slowly Drained Granular-Fluid Systems. Traffic and Granular Flow ’07 (pp. 629Springer
https://doi.org/10.1007/978-3-540-77074-9_69, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13104

Conference Contributions

Campbell, J. & Sandnes, B. (2015). Three-phase fracturing in granular material. In Geophysical research Abstracts, EGU2015
SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21346
Oppenheimer, J., Cashman, K., Rust, A., & Sandnes, B. (2014). How do crystal-rich magmas outgas?. In Geophysical Research Abstracts 16, EGU2014
SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21348
Eriksen, J., Sandnes, B., Toussaint, R., Maloy, K., & Flekkoy, E. (2014). Gravity Induced Ordering of Frictional Fingers. In Geophysical Research Abstracts 16, EGU2014-14715.
SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21347
Eriksen, J., Sandnes, B., Maloy, K., & Flekkoy, E. (2013). Modelling stick-slip dynamics in frictional fluids. In Geophysical Research Abstracts 15, EGU2013-14040
SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21350
Eriksen, J., Sandnes, B., Cueto-Felgueroso , L., & Juanes, R. (2013). Stability of Flow in Dense Suspensions. In AGU Fall Meeting, San Fransisco, USA, 2013
SU Repository: https://cronfa.swan.ac.uk/Record/cronfa21349

Edited Books

Toussaint, R., Sandnes, B., Koehn, D., Szymczak, P., Aharonov, E., & Sandnes, B. (Eds.). (2017). Flow and Transformations in Porous Media. Frontiers Media.
https://doi.org/10.3389/978-2-88945-077-0, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa31881
http://www.frontiersin.org/books/Flow_and_Transformations_in_Porous_Media/1118

Other Research Outputs

Holtzman, R., Sandnes, B., Moura, M., Icardi, M., & Planet, R. (2023). Editorial: Nonequilibrium Multiphase and Reactive Flows in Porous and Granular Materials
SU Repository: https://cronfa.swan.ac.uk/Record/cronfa64786

Supervision

Untitled (current)

PhD

Other supervisor: Dr Daniel Curtis
Untitled (current)

PhD

Other supervisor: Dr John Hiemstra
An in silico framework for tissue engineering scaffold design and characterisation (current)

PhD

Other supervisor: Dr Feihu Zhao
Spatiotemporal Instabilities in discontinuous shear thickening fluids (current)

PhD

Other supervisor: Dr Daniel Curtis
Effect of viscosity contrast and wetting on frictional fluid flow patterns (awarded 2022)

PhD

Other supervisor: Prof Chenfeng Li

Taught Modules

EG-003 Applied Engineering

This course provides an introduction to the principles of statics, dynamics and thermo-fluid mechanics relevant to engineering. A practical component will be used to complement taught theory.
EG-169 Environmental Awareness for Engineers

The module focuses on the environmental impacts of human activity, industry, and energy consumption. With the global population soaring past 8 billion in an increasingly industrialised world, human activity is now affecting energy and material balances on a global scale. The next generation of engineers must appreciate the environmental impacts of current technology in order to engineer better solutions for the future.
EGCM40 Pollutant transport by groundwater flows

This module focuses on groundwater flow in aquifers, the transport of pollutants by groundwater flows, and the chemical and biological transformation of pollutants in the subsurface.

Career History

Senior Lecturer, Swansea University

2012 - Present
Associate Professor, Norwegian University of Science and Technology

2011 - 2011
Fellowship, University of Oslo

2008 - 2011
Visiting Scholar, University of Sydney

2007 - 2011
Honorary Associate, Macquarie University, Sydney

2008 - 2011

Key Grants and Projects

Research grant 2015 - 2017

Flowback of proppant materials, National Research Network in Advanced Engineering and Materials (NRN)
Research grant 2015

High speed video system, Engineering Instrument Pool
Research grant 2014 - 2016

Multiphase fracturing of deformable media”, Engineering and Physical Sciences Research Council (EPSRC)
Research grant 2012 - 2015

Multiphase frictional fluid flows”, Research Council of Norway
Research grant 2012

Flow instabilities in frictional fluid dynamics, Royal Society
Funding award 2012 - 2015

Multiphase frictional fluid flows” (CI), RCN
Funding award 2008 - 2011

Non-equilibrium pattern formation and rheological responses in complex fluids, RCN
Research grant 2007 - 2011

Microrheology of nanostructured, soft materials, Research Council of Norway

Dr Bjornar Sandnes

Telephone number

Email address

Youtube Account

Research Links

About

Career Highlights

Research Highlights

All Research

Untitled (current)

Untitled (current)

An in silico framework for tissue engineering scaffold design and characterisation (current)

Spatiotemporal Instabilities in discontinuous shear thickening fluids (current)

Effect of viscosity contrast and wetting on frictional fluid flow patterns (awarded 2022)

EG-003 Applied Engineering

EG-169 Environmental Awareness for Engineers

EGCM40 Pollutant transport by groundwater flows

Senior Lecturer, Swansea University

Associate Professor, Norwegian University of Science and Technology

Fellowship, University of Oslo

Visiting Scholar, University of Sydney

Honorary Associate, Macquarie University, Sydney

Research grant 2015 - 2017

Research grant 2015

Research grant 2014 - 2016

Research grant 2012 - 2015

Research grant 2012

Funding award 2012 - 2015

Funding award 2008 - 2011

Research grant 2007 - 2011