Et profilbilde

Førsteamanuensis
Charlotte Obhrai { "honorific-suffix": "Førsteamanuensis", "fn": "Charlotte Obhrai", "tel": "Telefon: 51832164", "email": "charlotte.obhrai@uis.no" }

Avdeling/enhet Det teknisk- naturvitenskapelige fakultet
Institutt/senter Institutt for maskin, bygg og materialteknologi
Rom KE E-234

Forskningsområder

I am a metocean specialist working at the University of Stavanger as an Associate Professor in offshore wind research. My education is in the fields of mathematics, meteorology and hydrodynamics and I have extensive professional experience leading challenging commercial and research projects in the coastal and offshore marine environment. During my career I have applied my numerical and physical modelling skills to a range of marine engineering problems including; offshore wind turbines, sub-sea structures, offshore breakwaters & reefs, seawalls, and mobile coastlines.

Utvalgte publikasjoner

Obhrai, C., Gudmestad, O.T., Kalvig S., 2012, A review of current guidelines and research on wind modelling for the design of offshore wind turbines, ISOPE Conference, Rhodes, Greece.

Eliassen, L., Jakobsen, J.B., Obhrai, C., 2012, The Effect of Atmospheric Stability on the Fatigue Life of Offshore Wind Turbines, ISOPE Conference, Rhodes, Greece.

Obhrai, C., Powell, K.A., Rigden T, Johnson, A., 2011, Physical Modelling of the New Coastal Defence Scheme at Borth, Proceedings of ICE Conference in Coastal Management, Belfast, UK.

Obhrai , C., Powell, K.A. and Bradbury, A., 2008, A laboratory study of overtopping and breaching of shingle barrier beaches, Proc. 31th Int. Conf. Coastal Eng., Hamburg,

Sutherland, J., Brampton, A.H., Obhrai, C., Dunn, S. and Whitehouse, R.J.S., 2008.  ?Understanding the lowering of beaches in front of coastal defence structures, stage 2?.  Joint Defra/EA Flood and Coastal Erosion Risk Management R&D programme, R&D Technical Report FD1927/TR.

G. N. Bulluck, C. Obhrai, D.H. Peregrine and H. Bredmose (2007). ?Violent breaking wave impacts. Part 1: Results from large-scale regular wave tests on vertical and sloping walls?. Coastal Engineering. 54 (2007) pp 602?617.

D.H. Peregrine, H. Bredmose, G.N. Bullock, A.C. Hunt and C. Obhrai (2006) ?Water wave impact on walls and the role of air?. Proc. 30th Int. Conf. Coastal Eng., San Diego 2006. ASCE.

Sutherland, J, Obhrai, C, Whitehouse, RJS and AMC Pearce, 2006,  Laboratory tests of scour at a seawall.  In: Proceedings of the Third International Conference on Scour and Erosion, Amsterdam, 2006. CURNET, Gouda, The Netherlands [CD-ROM].

Wolters, G., Muller, G., Obhrai, C., Bruce T., Wave downfall pressures on coastal structures,  2005, ICE Maritime Journal, 158, pp 137-145.

Bullock, G., Obhrai, C., Müller, G., Wolters, G., Peregrine, H. & Bredmose, H., 2005, Advances in the understanding of wave impact forces, International Conference on Coastines, Structures and Breakwaters, Institute Civil Engineers.

Obhrai, C., et al. 2004, Violent wave impacts on vertical and inclined walls: large scale model tests, Proceedings of the 29th International Conference on Coastal Engineering, pp 4075-4086.

Wolters, G., Muller, G., Bullock, G., Obhrai, C., Peregrine, D.H., Bredmose, H., 2004, Field and large scale model tests of wave impact propagation into cracks, Proceedings of the 29th International Conference on Coastal Engineering, pp 4027-4039.

Bullock, G., Obhrai, C., Müller, G., Wolters, G., Peregrine, H. & Bredmose, H., 2004 Characteristics and design implications of breaking wave impacts. Proceedings of the 29th International Conference on Coastal Engineering, pp 3966-3978.

Peregrine, D.H., Obhrai, C., Bullock, G., Müller, G., Wolters, G., Bredmose, H., 2004, Violent water wave impacts and the role of air, Proceedings of the 29th International Conference on Coastal Engineering, pp 4005-4017.

Grune, J., Obhrai, C., Bullock, G., Wang, Z., 2004, Violent wave overtopping on vertical and inclined walls: large scale model tests, Proceedings of the 29th International Conference on Coastal Engineering , pp 4469-4481.

Bullock, G., Obhrai, C., Müller, G., Wolters, G., Peregrine, H. & Bredmose, H., 2003. Field and laboratory measurement of wave impacts. 3rd Int. Conf. Coastal Structures, Portland, Oregon, pp 343-355.

Obhrai C, Nielsen P, Vincent CE, 2002, Influence of Infiltration on Suspended Sediment Under Waves, Coastal Engineering, 45, pp 111-123.

Obhrai, C., 2001, A Study of the Processes Controlling the Re-Suspension of  Sand under Waves using Acoustic Instruments, PhD, University of East Anglia.

Vincent, C.E., Obhrai, C., Hanes DM, Dohmen-Janssen CM, 2001, Suspension by regular and groupy waves over bedforms in a large wave flume (SISTEX99), Coastal Dynamics ?01?, 303-312.

Pågående forskning

 

STORMGEO OFFSHORE WIND FORECASTING

A research project to investigate and evaluate existing offshore wind standards, with special focus on the use of metocean data and forecasting products, and find ways to develop improved methods for forecasting the uncertainty elements and hence to obtain better energy production forecasts for offshore wind turbines.

WAVE SLAMMING FORCES ON TRUSS STRUCTURES

Wind turbine foundation structures in shallow water may be prone to slamming forces from breaking waves, typically plunging breaking waves. The objective of the research is to obtain improved knowledge of slamming forces from waves breaking on truss structures through model tests on a large scale.

Arbeidserfaring

2011 - Present, Associate Professor, University of Stavanger ? Research project in offshore meteorology

 

2007 - 2011, Senior Coastal Scientist, Engineering Hydraulics & Structures Group, HR Wallingford

 

2005 - 2007, Coastal Scientist, Processes & Environments Group, HR Wallingford

 

2001 - 2005, Research Fellow, Studying Wave Impact Forces on Coastal Structures,

University of Plymouth

Vitenskapelige publikasjoner (fra CRISTin)

  • Jose, Jithin; Podrazka, Olga; Obhrai, Charlotte; Gudmestad, Ove Tobias (2015). Experimental Analysis of Slamming Loads for the Truss Structures Within the Framework of WaveSlam Project, Hydralab IV, Technical Report. Hydralab. 63 s.
  • Obhrai, Charlotte (2015). Experimental Analysis of Slamming Loads for Truss Structures WaveSlam Project. NORCOWE; 2015-04-06.
  • Obhrai, Charlotte (2015). Uncertainties and scale effects in breaking wave loads on marine structures. NORCOWE; 2015-09-15.
  • Eliassen, Lene; Jakobsen, Jasna Bogunovic; Obhrai, Charlotte (2012). The Effect of Atmospheric Stability on the Fatigue Life of Offshore Wind Turbines. ISOPE; 2012-06-17 - 2012-06-22.
  • Obhrai, Charlotte; Gudmestad, Ove Tobias; Kalvig, Siri M. (2012). A review of current guidelines and research on wind modelling for the design of offshore wind turbines. ISOPE; 2012-06-17 - 2012-06-22.
  • Obhrai, Charlotte (2011). Physical Modelling of the New Coastal Defence Scheme at Borth. The Institution of Civil Engineers (ICE); 2011-11-15 - 2011-11-16.