Odin Gramstad

  Position: Postdoc at at the Fluid mechanics group at the Department of Mathematics, University of Oslo.
  Office: B915 (9th floor, Niels Henrik Abel building)
  Phone: (+47) 977 61 778 (mobile), (+47) 22 85 58 55 (office)
  Email:

Mail address (work): Matematisk Institutt, P.B. 1053 Blindern, NO-0316 Oslo, Norway
Mail address (home): Sølve Solfengs vei 34, NO-0956 Oslo, Norway

Research:

My main research field is hydrodynamic wave theory. Topics I have worked on include: freak waves, weakly nonlinear models for surface gravity waves (NLS-type equations, Zakharov equation), phase averaged equations for water waves, swell/wave interaction.

Publications:

Journal papers

Gramstad, O. & Stiassnie, M. (2012), Phase-averaged equation for water waves. J. Fluid Mech. 718, 280-303. [pdf]
Trulsen, K., Zeng, H. & Gramstad, O. (2012), Laboratory evidence of freak waves provoked by non-uniform bathymetry. Phys. Fluids 24(9), 097101. [pdf]
Gramstad, O. & Trulsen, K. (2011), Fourth-order coupled nonlinear Schrödinger equations for gravity waves on deep water. Phys. Fluids 23(6), 062102. [pdf]
Gramstad, O. & Trulsen, K. (2011), Hamiltonian form of the modified nonlinear Schrödinger equation for gravity waves on arbitrary depth. J. Fluid Mech. 670, 404-426. [pdf]
Gramstad, O., Agnon, Y. & Stiassnie, M. (2011), The localized Zakharov equation: Derivation and validation. Eur. J. Mech. B 30 (2), 137-146. [pdf]
Toffoli, A., Gramstad, O., Trulsen, K., Monbaliu, J., Bitner-Gregersen, E. & Onorato, M. (2010), Evolution of weakly nonlinear random directional waves: laboratory experiments and numerical simulations. J. Fluid Mech. 664, 313-336. [pdf]
Gramstad, O. & Trulsen, K. (2010), Can swell increase the number of freak waves in a wind sea? J. Fluid Mech. 650, 57-79. [pdf]
Onorato, M., Cavaleri, L., Fouques, S., Gramstad, O., Janssen, P.A.E.M., Monbaliu, J., Osborne, A.R., Pakozdi, C., Serio, M., Stansberg, C.T., Toffoli, A. & Trulsen, K. (2009), Statistical properties of mechanically generated surface gravity waves: a laboratory experiment in a three-dimensional wave basin. J. Fluid Mech. 627, 235-257. [pdf]
Onorato, M., Waseda, T., Toffoli, A., Cavaleri, L., Gramstad, O., Janssen, P.A.E.M., Kinoshita, T., Monbaliu, J., Mori, N., Osborne, A.R., Serio, M., Stansberg, C.T., Tamura, H. & Trulsen, K. (2009), Statistical properties of directional ocean waves: the role of the modulational instability in the formation of extreme events. Phys. Rev. Lett. 102(11), 114502. [pdf]
Stiassnie, M. & Gramstad, O. (2009), On Zakharov's kernel and the interaction of non-collinear wavetrains in finite water depth. J. Fluid Mech. 639, 433-442. [pdf]
Regev, A., Agnon, Y., Stiassnie, M. & Gramstad, O. (2008), Sea-swell interaction as a mechanism for the generation of freak waves. Phys. Fluids 20(11), 112102. [pdf]
Gramstad, O. & Trulsen, K. (2007), Influence of crest and group length on the occurrence of freak waves. J. Fluid Mech. 582, 463-472. [pdf]

Theses

Gramstad, O. (2010), Weakly nonlinear dynamics of gravity waves. Ph.D. thesis, Department of Mathematics, University of Oslo.
Gramstad, O. (2006), Kan dønning framprovosere ekstreme bølger i vindsjø? Master thesis (in Norwegian), Department of Mathematics, University of Oslo. [pdf]

Courses:

Spring 2008: STK9060.
Autumn 2007: STK9050.
Spring 2007: MEK9340.

Teaching:

Autumn 2011: MEK 4320.
Spring 2010: MEK 1100.
Autumn 2009: MEK 1100.
Spring 2009: MEK 1100.
Autumn 2008: MEK 1100.
Spring 2008: MEK 1100.
Autumn 2007: MEK 1100.
Spring 2007: MEK 1100.
Autumn 2006: MEK 1100 and MEK 4200.

List of photocopied articles