Nils Reidar B. Olsen 

Professor

Siv. Ing. (MSc), The Norwegian Institute of Technology, 1987.
Dr.ing., The Norwegian Institute of Technology, 1991. 

Address:

Department of Hydraulic and Environmental Engineering, NTNU
S.P. Andersensvei 5
N-7491 Trondheim
Norway

Lecturing

  • TVM 4155 Numerical Modelling and Hydraulics
  • TVM 4116 Fluid Mechanics, Basic Course

    Research

    Computational Fluid Dynamics in Hydraulic Engineering

    International Publications

    2017

    Olsen, N. R. B. (2017), Numerical modelling of downstream-migrating antidunes, Earth Surface Processes and Landforms.Vol 42, pp 2393–2401. doi:10.1002/esp.4193.

    Hillebrand, G., Klassen, I. and Olsen, N. R. B. (2017), 3D CFD modelling of velocities and sediment transport in the Iffezheim hydropower reservoir, Hydrology Research, Vol. 48, Issue 1, pp. 147-159. doi:10.2166/nh.2016.197.

    2016

    Olsen, N. R. B. (2016), Numerical modelling of antidune formation and propagation, International Symposium on River Sedimentation, Stuttgart, Germany.

    2015

    Olsen, N. R. B. (2015), Four free surface algorithms for the 3D Navier-Stokes equations, Journal of Hydroinformatics, Vol. 17, Issue 6, pp 845-856.

    Brĺtveit, K. and Olsen, N. R. B. (2015), Calibration of horizontal acoustic doppler current profilers by three dimensional CFD simulations (OpenAccess), Engineering Applications of Computational Fluid Mechanics, Vol. 9, Issue 1, pp 41-49.

    Baranya, S., Olsen, N. R. B. and Jozsa, J. (2015), Flow analysis of a river confluence with field measurements and RANS model with nested grid approach , River Research and Applications, Vol. 31, Issue 1, pp 28-41.

    2014

    Harb, G., Haun, S., Schneider, J. and Olsen, N. R. B. (2014), Numerical analysis of synthetic granulate deposition in a physical model study, International Journal of Sediment Research, Vol. 29, Issue 1, pp 110-117.

    Nřvik, H., Dudhraj, A., Olsen, N. R. B., Bishwakarma, M. B. and Lia, L. (2014), Numerical modelling of non-uniform flow in settling basins (OpenAccess), Hydro Nepal, Vol. 14, pp 27-35.

    Baranya, S., Olsen, N. R. B., Stoesser, T. and Sturm, T. (2014), A nested grid based computational fluid dynamics model to predict bridge pier scour, Water Management, Vol. 167, Issue 5, pp 259–268, DOI: 10.1680/wama.12.00104.

    2013

    Olsen, N. R. B. (2013), Numerical Algorithms for Predicting Sediment Slides in Water Reservoirs (OpenAccess), Electronic Journal of Geotechnical Engineering, Vol. 18, Bund.Y, Paper 2013.496.

    Bomminayuni, S, Stoesser, T. and Olsen, N. R. B. (2013), Evaluation of Low Reynolds Number Turbulence Models for an Open-Channel Flow over a Rough Bed Using LES Data , Journal of Hydraulic Engineering, Vol. 139, Issue 6, pp. 664-668.

    Eilertsen, R., Olsen, N. R. B., Rüther, N. and Zinke, P. (2013), Channel-bed changes in distributaries of the lake Řyeren delta, southern Norway, revealed by interferometric sidescan sonar (OpenAccess), Norwegian Journal of Geology, Vol. 93, No. 1.

    Haun, S., Kjćrĺs, H., Lřvfall, S. and Olsen, N. R. B. (2013), Three-dimensional measurements and numerical modelling of suspended sediments in a hydropower reservoir, Journal of Hydrology, 479, pp 180-188.

    Haun, S., Lizano, L. and Olsen, N. R. B. (2013) "Measuring suspended sediment concentration in a reservoir using laser diffraction", IAHR 35th Congress, Chengdu, China.

    Brĺtveit, K., Brevik, O. and Olsen, N. R. B. (2013) "Three-dimensional numerical study of an unlined rock-blasted sand trap", IAHR 35th Congress, Chengdu, China.

    Zhang, Q., Hillebrand, G., Klassen, I., Vollmer, S., Olsen, N. R. B., Moser, H. and Hinkelmann, R. (2013) "Sensitivity analysis of flow field simulation in the Iffezheim reservoir in Germany using the 3D SSIIM model", IAHR 35th Congress, Chengdu, China.

    2012

    Haun, S. and Olsen, N. R. B. (2012), Three-dimensional numerical modelling of reservoir flushing in a prototype scale, International Journal of River Basin Management, 10:4; pp. 341-349, DOI:10.1080/15715124.2012.736388.

    Baranya, S., Olsen, N. R. B., Stoesser, T. and Sturm, T. (2012), Three-dimensional RANS modeling of flow around circular piers using nested grids (OpenAccess), Engineering Applications of Computational Fluid Mechanics, Vol. 6, No. 4, pp 648-662.

    Feurich, R., Boubee, J. and Olsen, N. R. B. (2012), Improvement of fish passage in culverts using CFD, Ecological Engineering, Vol 47, Oct. 2012, pp 1–8; doi:10.1016/j.ecoleng.2012.06.013.

    Haun, S. and Olsen, N. R. B. (2012), Three-dimensional numerical modelling of the flushing process of the Kali Gandaki Hydropower Reservoir, Lakes and Reservoirs, Research and Management, Vol. 17, issue 1, pp 25-33.

    Feurich, R. and Olsen, N. R. B. (2012), Finding the Free Surface of Supercritical Flows - a Numerical Investigation (OpenAccess), Engineering Applications of Computational Fluid Mechanics, Vol. 6, No. 3, pp 307-315.

    Haun, S. and Olsen, N. R. B. (2012) "3D numerical simulation of the flushing process in the Angostura reservoir", RiverFlow 2012, San Jose, Costa Rica.

    Haun S. and Olsen, N. R. B. (2012), "Numerical simulation of sediment deposition in a hydropower reservoir", Proceedings of the 18th IAHR Asia-Pacific Congress, Jeju-Island, South Korea, 2012.

    Haun, S., Dorfmann, C., Harb, G. and Olsen, N. R. B. (2012), 3D numerical modelling of the reservoir flushing of the Bodendorf reservoir, Austria, IAHR European Conference, Munich, Germany.

    Vingerhagen, S. and Olsen, N. R. B. (2012), 3D numerical modelling of the capacity for a partially pressurized spillway, IAHR European Conference, Munich, Germany.

    Feurich, R. and Olsen, N. R. B. (2012) "3D numerical simulation of supercritical junction flow", IAHR European Conference, Munich, Germany.

    Hillebrand, G., Klassen, I., Olsen, N. R. B. and Vollmer, S. (2012) "Modelling fractionated sediment transport and deposition in the Iffezheim reservoir", 10th International Conference on Hydroinformatics, Hamburg, Germany.

    Roberts, M., Rüther, N., Olsen, N. R. B. and Vollmer, S. (2012) "3D modelling of changes in sediment transport, bed composition and porosity during a flood event at the river Elbe", 10th International Coneference on Hydroinformatics, Hamburg, Germany.

    2011

    Haun, S., Olsen, N. R. B. and Feurich, R. (2011), Numerical modelling of flow over a trapezoidal broad-crested weir (OpenAccess), Engineering Applications of Computational Fluid Mechanics, Vol. 5, No. 3, pp 397-405.

    Feurich, R., Boubée, J. and Olsen, N. R. B. (2011), Spoiler Baffles in Circular Culverts, Journal of Environmental Engineering. Vol. 137, No. 9. pp. 854-857; doi:10.1061/(ASCE)EE.1943-7870.0000384.

    Zinke, P., Olsen, N. R. B. and Bogen, J. (2011), 3D numerical modeling of levee depositions in a Scandinavian freshwater delta, Geomorphology 129, pp. 320-333; doi:10.1016/j.geomorph.2011.02.027.

    Bihs, H. and Olsen, N. R. B. (2011), Numerical Modeling of Abutment Scour with the Focus on the Incipient Motion on Sloping Beds, Journal of Hydraulic Engineering, No. 10, pp. 1287-1292. doi:10.1061/(ASCE)HY.1943-7900.0000401

    Feurich, R. and Olsen, N. R. B. (2011), Three-Dimensional Modeling of Nonuniform Sediment Transport in an S-shaped Channel, Journal of Hydraulic Engineering, 137, 493 (2011); doi:10.1061/(ASCE)HY.1943-7900.0000321.

    Feurich, R., Kettner, F. and Olsen, N. R. B. (2011) "Three-Dimensional Numerical Investigation of Spillway and Reservoir Hydraulics", 34th IAHR Congress, Brisbane, Australia.

    Haun, S., Hoven, L., Olsen, N. R. B., Rodríguez Meza, C. R. and Lizano, L. (2011) "3D numerical modelling of sediment deposition and flushing in the Angostura reservoir, Costa Rica", 34th IAHR Congress, Brisbane, Australia.

    Hillebrand, G. and Olsen, N. R. B. (2011) "Towards modeling consolidation of fine sediments upstream of the Iffezheim barrage, Upper Rhine River, Germany", RCEM 2011, The 7th IAHR Symposium on River, Coastal and Estuarine Morphodynamics, Beijing, China.

    Klassen, I., Hillebrand, G., Olsen, N. R. B., Vollmer, S., Lehmann, B. and Nestmann, F. (2011) "Modeling fine sediment aggregation processes considering varying fractal dimensions", RCEM 2011. The 7th IAHR Symposium on River, Coastal and Estuarine Morphodynamics, Beijing, China.

    2010

    Jacobsen, J. and Olsen, N. R. B. (2010), 3D numerical modelling of the capacity for a complex spillway, Water Management, Vol. 163, Issue WM6, pp. 283-288.

    Zinke, P., Olsen, N. R. B., Bogen, J. and Rüther, N. (2010), 3D modelling of the flow distribution in the delta of Lake Řyern, Norway, Hydrology Research, Vol, 41, No. 2, pp. 92-103, doi:10.2166/nh.2010.018.

    Rüther, N., Jacobsen, J., Olsen, N. R. B. and Vatne, G. (2010), Prediction of the three dimensional flow field and bed shear stresses in a regulated river in Mid-Norway, Hydrology Research, Vol, 41, No. 2, pp. 145-152, doi:10.2166/nh.2010.064.

    Fischer-Antze, T., Rüther, N., Olsen, N.R.B. and Gutknecht, D. (2010) Discussion on: "Three-dimensional (3D) modeling of non-uniform sediment transport in a channel bend with unsteady flow", Journal of Hydraulic Research, Volume 48., No. 6, pp 824-825.

    Olsen, N. R. B. (2010) "Result assessment methods for 3D CFD models in sediment transport computations", 1st Conference of the European section of the IAHR, Edinburgh, Scotland. Download PDF file

    Hillebrand, G. and Olsen, N. R. B. (2010) "Hydraulic characteristics of the open annular flume – experiment and numerical simulation", 1st Conference of the European section of the IAHR, Edinburgh, Scotland.

    Feurich, R. and Olsen, N. R. B. (2010) "Computation of bed deformation in an S-shaped channel using 3D numerical simulation", 1st Conference of the European section of the IAHR, Edinburgh, Scotland.

    Bihs, H. and Olsen, N. R. B. (2010) "Numerical investigations of local scour around a trapezoidal abutment using the finite volume method", 1st Conference of the European section of the IAHR, Edinburgh, Scotland.

    Bihs, H., Olsen, N. R. B. and Stoesser, T. (2010) "Calculation of secondary flow in a straight open channel with RANS and LES", 6th Int. Symp. on Env. Hydrualics, Athens, Greece. Environmental Hydraulics, CRC Press, Vol. 2, pp. 955-960.

    Olsen, N. R. B., Aberle, J. and Koll, K. (2010) "Resolving large bed roughness elements with an unstructured hexahedral grid", RiverFlow 2010, Braunschweig, Germany.

    Olsen, N. R. B. and Haun, S. (2010) "Free surface algorithms for 3D numerical modelling of reservoir flushing", RiverFlow 2010, Braunschweig, Germany.

    2009

    Stoesser, T., Ruether, N. and Olsen, N. R. B. (2009), Calculation of Primary and Secondary Flow and Boundary Shear Stresses in a Meandering Channel, Advances in Water Resources, Vol. 33, No. 2, pp 158-170, doi:10.1016/j.advwatres.2009.11.001.

    Fischer-Antze, T., Ruether, N., Olsen, N. R. B and Gutknecht, D. (2009), 3D modeling of non-uniform sediment transport in a channel bend with unsteady flow, Journal of Hydraulic Research, Vol. 47, No. 5, pp. 670-675.

    Zinke, P., Ruether, N., Olsen. N.R.B., Eilertsen, R.S. (2009) "3D Modelling of morphodynamics in deltas due to Hydropower regulation", Proc. of the Annual Conference on Hydraulic Engineering: "Water power and climate change", Dresdner Wasserbauliche Mitteilung, Technical University Dresden, Germany.

    Bihs H., Olsen N.R.B. (2009) "Three Dimensional Numerical Modeling of Complex Free Surface Flow over a Backward Facing Step", 5th National Conference on Computational Mechanics, MekIT' 09, Trondheim, Norway

    Zinke, P. and Olsen, N. R. B. (2009) "Numerical modeling of water and sediment flow in a delta with natural vegetation", 33rd IAHR Congress, Vancouver, Canada.

    2008

    Fischer-Antze, T., Olsen, N. R. B. and Gutknecht, D. (2008), Three-dimensional CFD modeling of morphological bed changes in the Danube River (OpenAccess), Water Resources Research, Vol. 44, No. 9, W09422, doi:10.1029/2007WR006402.

    Stoesser, T., Ruether, N. and Olsen, N. R. B. (2008) "Near-Bed Flow Behavior in a Meandering Channel", RiverFlow 2008, International Conference on Fluvial Hydraulics, Cesme, Izmir, Turkey, Vol. 1, pp. 793-799.

    Rueter, N., Olsen, N. R. B. and Eilertsen, R. (2008) "3D modeling of flow and sediment transport over natural dunes", RiverFlow 2008, International Conference on Fluvial Hydraulics, Cesme, Izmir, Turkey, Vol. 2, pp. 1479-1485.

    Bihs, H. and Olsen, N. R. B. (2008) "Three dimensional numerical modeling of secondary flows in channels with longitudinal bedforms", RiverFlow 2008, International Conference on Fluvial Hydraulics, Cesme, Izmir, Turkey, Vol. 1, pp. 179-183.

    Zinke, P., Olsen, N. R. B. and Sukhodolova, T. (2008) "Modeling of hydraulics and morphodynamics in a vegetated river reach", RiverFlow 2008, International Conference on Fluvial Hydraulics, Cesme, Izmir, Turkey, Vol. 1, pp. 367-376.

    Zinke, P., Olsen, N. R. B. and Ruether, N. (2008) "3D Modelling of the flow distribution in the delta of Lake Řyern (Norway)", International Conference on Hydroscience and Engineering, Nagoya, Japan, pp. 270-280.

    Eiletsen, R., Olsen, N. R. B., Ruether, N. and Zinke, P. (2008) "River bed changes in the Lake Řyeren delta distributaries over a three-year period (2004 - 2007) as revealed by interferometric multibeam", International Geological Congress (IGC2008) Oslo, Norway.

    Bihs, H. and Olsen, N. R. B. (2008) "Three dimensional numerical modeling of pier scour", Fourth International Conferece on Scour and Erosion, Tokyo, Japan.

    2007

    Ruether, N. and Olsen, N. R. B. (2007), Modelling free-forming meander evolution in a laboratory channel using three-dimensional computational fluid dynamics, Geomorphology, No. 89, pp. 308-319, DOI: 10.1016/j.geomorph.2006.12.009.

    Wilson, C. A. M. E., Guymer, I., Boxall, J. B. and Olsen, N. R. B. (2007), Three-dimensional numerical simulation of solute transport in a meandering self-formed river channel, Journal of Hydraulic Research, Vol. 45, No. 5, pp. 610-616, DOI:10.1080/00221686.2007.9521797.

    Bihs H. and Olsen N.R.B. (2007) "Three-Dimensional Numerical Modeling of Contraction Scour", 32nd IAHR Congress, Venice, Italy.

    Zinke, P. and Olsen N.R.B. (2007) "Modeling of sediment deposition in a partly vegetated open channel", 32nd IAHR Congress, Venice, Italy.

    Bihs H. and Olsen N.R.B. (2007) "Three-Dimensional Numerical Modeling of Abutment Scour", Fifth International Symposium on Environmental Hydraulics, Tempe, USA

    2006

    Wilson, C. A. M. E., Yagci, O., Rauch, H.-P. and Olsen, N. R. B. (2006), 3D numerical modelling of a willow vegetated river/floodplain system, Journal of Hydrology, Vol. 327, July, pp. 13-21, doi:10.1016/j.jhydrol.2005.11.027.

    Stoesser, T., Rodi, W. and Olsen, N. R. B. (2006) "Large Eddy and RANS flow simulation above dunes", Flow Simulation in Hydraulic Engineering, Dresden, Germany, 9-11 March 2006.

    Stoesser, T., von Terzi, D., Rodi, W. and Olsen, N. R. B. (2006) "RANS simulations and LES over dunes at low relative submergence ratios", 7th Int. Conf. on Hydroscience and Engineering, Philadelphia, USA, 10-13 September 2006.

    Ruether, N., Olsen. N.R.B. (2006) "Towards the prediction of free-forming meander formation using 3D computational fluid dynamics", Flow Simulation in Hydraulic Engineering, Dresden, Germany, 9-11 March 2006.

    Ruether, N., Olsen. N.R.B. (2006) "3D modeling of transient bed deformation in a sine-generated laboratory channel with two different width to depth ratios", Third International Conference on Fluvial Hydraulics, River Flow 2006, Lisbon, Portugal.

    Viscardi, J. M., Pujol, A., Weitbrecht, V., Jirka, G. H. and Olsen, N. R. B. (2006) "Numerical Simulations on the Paraná de las Palmas River", Third International Conference on Fluvial Hydraulics, River Flow 2006, Lisbon, Portugal.

    2005

    Ruether, N. and Olsen. N.R.B. (2005), Three dimensional modeling of sediment transport in a narrow 90° channel bend, Journal of Hydraulic Engineering, October, Vol. 131, pp. 917-920, doi:10.1061/(ASCE)0733-9429(2005)131:10(917).

    Ruether, N., Singh, J. M., Olsen, N. R. B. and Atkinson, E. (2005), Three-dimensional modelling of sediment transport at water intakes, Proceedings of the Institution of Civil Engineers, UK, Water Management, Vol. 158, March, pp 1-7.

    Olsen, N. R. B., Pegg, I, Molliex, J., Berger, H. and Fjeldstad, H-P, (2005) "3D CFD mdelling of erosion in habitat improvement gravel", 31st. IAHR Congress, Seoul, Korea.

    Ruether, N. and Olsen, N. R. B. (2005) "Advances in 3D modeling of free-forming meander formation from initially straight alluvial channels", 31st. IAHR Congress, Seoul, Korea.

    Wildhagen, J., Ruether, N., Olsen, N. R. B. and Guymer, I. (2005) "Three-dimensional modelling of sediment transport in a sharply curved meandering channel", 31st. IAHR Congress, Seoul, Korea.

    2004

    Olsen, N. R. B. (2004), Closure to "Three-dimensional CFD modeling of self-forming meandering channel", Journal of Hydraulic Engineering, Vol. 130, No 8, pp. 838-839, doi:10.1061/(ASCE)0733-9429(2004)130:8(838).

    Hedger, R. D., Olsen, N. R. B., George, D. G., Malthus, T. J. and Atkinson, P. M. (2004), Modelling spatial distributions of Ceratium hirundnella and Microcystis spp. in a small productive British lake, Hydrobiologia, 528 (1-3), pp. 217-227, doi:10.1007/s10750-004-2349-1.

    Jimenez, O., Rodriguez, C. and Olsen, N. R. B. (2004) "Sedimentation in the Angostura Reservoir, Studies and Experiences", 9th International Symposium on River Sedimentation, Yichang, China

    Olsen, N. R. B., Pegg, I., Alfredsen, K. T., Fergus, T. and Fjeldstad, H-P. (2004) "3D CFD modelling of sediment deposition in habitat improvement structures", 5th International Symposium on Ecohydraulics, Madrid, Spain.

    Ruether, N. and Olsen. N.R.B. (2004) "Three dimensional modeling of sediment transport in a channel bend", Second International Conference on Fluvial Hydraulics, Naples, Italy. Balkema publishers, page 151-154.

    Fischer-Antze, T., Gutknecht, D. and Olsen, N. R. B. (2004) "3d numerical modelling of morphological bed changes in the Danube river", Second International Conference on Fluvial Hydraulics, Naples, Italy.

    Wilson, C. A. M. E., Yagci, O., Olsen, N. R. B. and Rauch, H. P. (2004) "3D numerical modelling of vegetated compound channel flows", 6th International Conference on Hydroinformatics, Singapore.

    Wilson, C. A. M. E., Stoesser, T. and Olsen, N. R. B. (2004) "Validation of a 3D Computational Dynamics Code in the Simulation of Meandering Compound Channel Flows", The Sixth International Conference on Hydroscience and Engineering, Brisbane, Australia.

    2003

    Olsen, N. R. B. (2003), 3D CFD Modeling of a Self-Forming Meandering Channel, Journal of Hydraulic Engineering, No. 5, May, pp 366-372, doi:10.1061/(ASCE)0733-9429(2003)129:5(366).

    Wilson C. A. M. E., Boxall J. B., Guymer I. and Olsen N. R. B. (2003), Validation of a 3D numerical code in the simulation of pseudo-natural meandering flows, Journal of Hydraulic Engineering, Vol. 129, No. 10, pp 758-768, doi:10.1061/(ASCE)0733-9429(2003)129:10(758).

    Wilson C. A. M. E., Stoesser T., Olsen N. R. B. and Bates P. D. (2003), Application and Validation of Numerical Codes in the Prediction of Compound Channel Flows, Proceedings of the Institution of Civil Engineers, UK, Water and Maritime Engineering, No. 153, pp. 117-128.

    Ruether, N. and Olsen. N.R.B. (2003) "CFD modeling of meandering river evolution", XXX IAHR Congress, Thessaloniki, Greece.

    Wilson, C. A. M. E., Olsen, N. R. B., Boxall, J. B. and Guymer, I. (2003) "Three-dimensional numerical simulation of solute transport in a meandering channel" XXX IAHR Congress, Thessaloniki, Greece.

    Ruether, N. and Olsen, N. R. B. (2003) "CFD modeling of alluvial channel instabilities", 3rd IAHR Symposium on River, Coastal and Estuarine Morphodynamics, Barcelona, Spain.

    2002

    Olsen, N. R. B. (2002) "Estimating meandering channel evolution using a 3D CFD model", Hydroinformatics 2002, Cardiff, UK.

    Hedger, R. D., Olsen, N. R. B., Malthus, T. J. and Atkinson, P. M. (2002) "Coupling remote sensing with computational fluid dynamics modelling to estimate lake chlorophyll-a concentration", Remote Sensing of Environment, Vol. 79, No. 1, pp. 116-122.

    Olsen, N. R. B. (2002) "Hydroinformatics, fluvial hydraulics and limnology", Department of Hydraulic and Environmental Engineering, The Norwegian University of Science and Technology. Download 1.3 MB PDF file.

    2001

    Fischer-Antze, T., Stösser, T., Bates, P. and Olsen, N. R. B. (2001), 3D numerical modelling of open-channel flow with submerged vegetation, Journal of Hydraulic Research, Vol. 39, No. 3, pp 303-310, doi:10.1080/00221680109499833.

    Olsen, N. R. B. and Aryal, P. R. (2001) "3D CFD modelling of water flow in the sand trap of Khimti Hydropower Plant, Nepal", Hydropower -2001, Bergen, Norway.

    Krüger, S. and Olsen, N. R. B. (2001) "Shock-wave computations in channel contractions", XXIX IAHR Congress, Beijing, China.

    2000

    Olsen, N. R. B., Hedger, R. D. and George, D. G. (2000), 3D Numerical Modelling of Microcystis Distribution in a Water Reservoir, Journal of Environmental Engineering, Vol. 126, No. 10, doi:10.1061/(ASCE)0733-9372(2000)126:10(949).

    Olsen, N. R. B. and Lysne, D. K. (2000), Numerical modelling of circulation in Lake Sperillen, Norway, Nordic Hydrology, Vol. 31, No. 1, pp. 57-72, doi:10.2166/nh.2000.005.

    Olsen, N. R. B. (2000) "Unstructured hexahedral 3D grids for CFD modelling in fluvial geomorphology", Hydroinformatics 2000, Iowa, USA.

    Olsen, N. R. B. (2000) "CFD modelling of bed changes during flushing of a reservoir", Hydroinformatics 2000, Iowa, USA.

    1999

    Olsen, N. R. B. (1999), Two-dimensional numerical modelling of flushing processes in water reservoirs, Journal of Hydraulic Research, No. 1, pp 3-16. abstract

    Olsen, N. R. B. and Kjellesvig, H. M. (1999), Three-dimensional numerical modelling of bed changes in a sand trap, Journal of Hydraulic Research, Vol. 37, No. 2. abstract, DOI:10.1080/00221689909498305.

    Hedger, R.D., Olsen, N.R.B., George, D.G., Atkinson, P.M., Malthus, T.J. (1999) "Dynamic modelling of the spatio-temporal distribution of phytoplankton in a small productive lake", 4th International Conference on GeoComputation, Fredericksberg, USA.

    Hedger, R.D., Olsen, N.R.B., Malthus, T.J., Atkinson, P.M. (1999) "The analysis of water quality spatial distributions in lakes by the integration of computational fluid dynamics with remote sensing", 25th Annual Conference of the Remote Sensing Society, Cardiff, UK.

    Olsen, N. R. B. and Wilson, C. A. M. E. (1999) "CFD modelling of rivers and reservoirs", Int. Seminar on Optimum Use of Run-of-River Hydropower Schemes, Trondheim, Norway. abstract

    Olsen, N. R. B., Jimenez, O. F., Abrahamsen, L. and Lřvoll, A. (1999) "3D CFD modelling of water and sediment flow in a hydropower reservoir", International Journal of Sediment Reserach, Vol. 14, No. 1. abstract

    Olsen, N. R. B. and Lysne, D. K. (1999) "3D Numerical Modelling of Water Currents in an Ice-Covered Lake", IAHR 28th. Bienneal Congress, Graz, Austria.

    Olsen, N. R. B., Hedger, R. D. and George, D. G. (1999) "Modelling the Horizontal Distribution of Algae in a Water Supply Reservoir", IAHR 28th. Bienneal Congress, Graz, Austria.

    Olsen, N. R. B., Kjellberg, G., Bakken, T. H. and Alfredsen, K. A. (1999) "Numerical modelling of water quality in Lake Mjřsa, Norway, during the flood of 1995", Ecohydraulics '99, Salt Lake City, USA. abstract

    Olsen, N.R.B., Hedger, R. D., Heslop, S., George, D. G. (1999) "Computing spatial variation of algae in water supply reservoirs", International Conference on Computing and Control for the Water Industry, CCWI'99, Exeter, UK.

    Olsen, N. R. B. (1999) "Computational Fluid Dynamics in Hydraulic and Sedimentation Engineering", Class notes, Department of Hydraulic and Environmental Engineering, The Norwegian University of Science and Technology. download PDF file

    1998

    Olsen, N. R. B. and Kjellesvig, H. M. (1998), Three-dimensional numerical flow modelling for estimation of maximum local scour depth, Journal of Hydraulic Research, No. 4, pp. 579-590, DOI:10.1080/00221689809498610.

    Olsen, N. R. B. and Kjellesvig, H. M. (1998), Three-dimensional numerical flow modelling for estimation of spillway capacity, Journal of Hydraulic Research, No. 5, pp. 775-784. DOI:10.1080/00221689809498602.

    Hedger, R.D., Olsen, N.R.B., Malthus, T.J., Atkinson, P.M., George, D.G. (1998) "Dynamically modelling chlorophyll-a concentration in a remotely sensed image of Loch Leven", The 24th Annual Conference of the Remote Sensing Society, Greenwich, UK.

    Olsen, N. R. B. and Heslop, S. (1998) "Flow visualisation by particle animation for 3D CFD modelling in hydraulic engineering", HYDROINFORMATICS '98, Copenhagen, Denmark.

    Olsen, N. R. B. (1998) "Unstructured and nested grids for 3D CFD modelling in hydraulic engineering", HYDROINFORMATICS '98, Copenhagen, Denmark. abstract

    Olsen, N. R. B. and Tjomsland, T. (1998) "3D CFD modelling of wind-induced currents and radioactive tracer movements in a lake", 3rd. International Conference on Hydroscience and Engineering, Cottbus, Germany.

    Olsen, N. R. B., Hedger, R. D., George, D. G. and Heslop, S. (1998) "3D CFD modelling of spatial distribution of algae in Loch Leven, Scotland", 3rd. International Conference on Hydroscience and Engineering, Cottbus, Germany. abstract

    1997

    Olsen, N. R. B. (1997) "Computational Fluid Dynamics as a tool for prediction of reservoir flushing and sedimentation", Q 74 a), ICOLD Conference, Florence, Italy.

    Olsen, N. R. B. (1997) "A framework for a 3D numerical model for hydropower reservoir water quality", HYDROPOWER '97, Trondheim, Norway.

    Olsen, N. R. B. and Kjellesvig, H. M. (1997) "A 3D numerical model for determination of spillway capacity", HYDROPOWER '97, Trondheim, Norway.

    Olsen, N. R. B. and Kjellesvig, H. M. (1997) "3D Numerical Modelling of Sediment Deposition and Bed Changes in a Tunnel-Type Sand Trap", IAHR/ASCE Congress, San Fransisco, USA.

    1996

    Olsen, N. R. B. and Melaaen, M. C. (1996) "Three-dimensional numerical modelling of vortex shedding behind circular cylinders", 2nd. International Conference on Modelling, Testing and Monitoring for Hydro Powerplants", Lausanne, Switzerland.

    Olsen, N. R. B. (1996) "Three-dimensional numerical modelling of local scour", HYDROINFORMATICS 96, Zurich, Switzerland.

    1995

    Olsen, N. R. B. and Stokseth, S. (1995), Three-dimensional numerical modeling of water flow in a river with large bed roughness, Journal of Hydraulic Research, Vol. 33, No. 4., pp. 571-581. abstract

    Lovoll, A., Lysne, D. K. and Olsen, N. R .B. (1995) "Numerical and physical modelling of dynamic impact on structures from a flood wave", IAHR 26th. Biennial Congress, London.

    Lysne, D. K., Olsen, N. R. B., Stole, H and Jacobsen, T. (1995) "Withdrawal of water from sediment carrying rivers. Recent developments in planning and operation of headworks", International Journal on Hydropower and Dams, March.

    Olsen, N. R. B. and Tesaker, E. (1995) "Numerical and physical modeling of a turbidity current", IAHR 26th. Biennial Congress, London.

    Olsen, N. R. B. and Oldervik, O. (1995) "Three-dimensional numerical modeling of water flow through a gate plug", IAHR 26th. Biennial Congress, London.

    Olsen, N. R. B. and Chandrashekhar, J. (1995) "Calculation of water and sediment flow in desilting basins", 6th. International Symposium on River Sedimentation, New Delhi, India.

    Olsen, N. R. B. (1995) "Numerical modelling of hydropower reservoir flushing", International Conference on Hydropower into the next Century", Barcelona, Spain.

    1994

    Olsen, N. R. B. and Skoglund, M. (1994), Three-dimensional numerical modeling of water and sediment flow in a sand trap, Journal of Hydraulic Research, Vol. 32, No. 6,pp. 833-844. abstract

    Olsen, N. R. B., Jimenez, O., Lovoll, A. and Abrahamsen, L. (1994) "Calculation of water and sediment flow in hydropower reservoirs", 1st. International Conference on Modeling, Testing and Monitoring for Hydro Powerplants, Hungary.

    Olsen, N. R. B. (1994) "Design of flusing pipes for sand traps", 1st. International Conference on Modeling, Testing and Monitoring for Hydro Powerplants, Hungary.

    Olsen, N. R. B. and Alfredsen, K. (1994) "A three-dimensional model for calculation of hydraulic parameters for fish habitat", IAHR Conference on Habitat Hydraulics, Trondheim, Norway. abstract

    Olsen, N. R. B. (1994) "SSIIM - A three-dimensional numerical model for simulation of water and sediment flow", HYDROSOFT-94, Porto Carras, Greece.

    1993

    Olsen, N. R. B. and Melaaen, M. C. (1993), Three-dimensional numerical modeling of scour around cylinders, Journal of Hydraulic Engineering, Vol. 119, No. 9, September, abstract, doi:10.1061/(ASCE)0733-9429(1993)119:9(1048).

    Olsen, N. R. B. and Melaaen, M. C. (1993) "Numerical Modeling of Erosion around a Cylinder and Sediment Deposition in a Hydropower Reservoir", Eight International Conference on Numerical Methods in Laminar and Turbulent Flow, Swansea, UK.


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    * Department of Civil and Environmental Engineering


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