v2.2.12 (2462)

PA - C8 - MEC665 : Sea States, Wave Propagation, and Ocean Wave Energy

Domaine > Mécanique.

Descriptif

Sea States, Wave Propagation, and Ocean Wave Energy


The proposed course is divided in three main parts: (1) Characterizing waves and describing the
important physical processes governing oceanic and nearshore wave propagation, (2) Numerical
modeling of wave propagation, and (3) Ocean wave energy, including wave-structure interactions.


At the end of the course, a student should be able to:
- describe wave characteristics using deterministic and spectral approaches,
- understand the di erent physical processes governing wave transformation at a range of spatial
and temporal scales, from wind generation to interactions with the bottom,
- evaluate the appropriate numerical modeling approaches to use for di erent applications,
- understand the physical processes governing wave-body interactions,
- estimate the absorbed wave energy of a wave energy converter, and
- evaluate the application of industrial and academic numerical modeling approaches to simulate
wave-structure interactions.

Syllabus
I. Characterizing ocean waves and sea states (10/01/2020 )
• Introduction to class
• Description of waves
• Sea state characterization (wave-by-wave, spectral analysis)
• Wave observation techniques and databases


II. Linear wave theory (17/01/2020 )
• Linearization of the water wave problem
• Dispersion relation
• Wave kinematics and approximations in shallow and deep water
• Nonlinear wave theories (Stokes, Cnoidal, stream function)
Exercise: Using wave buoy measurements to generate scatter diagrams and to characterize
wave variability at an o shore study site.


III. Nearshore wave propagation (24/01/2020 )
• Wave energy
ux conservation
• Bathymetric refraction
• Wave shoaling
Exercise: Using a one-line model to calculate wave transformation in the surf zone (and
comparison to wave tank experiments).


IV. Coastal hydrodynamics (31/01/2020 )
• Characterization of wave breaking
• Wave breaking impacts (undertow, setup, longshore currents)
• Surf zone circulation (rip currents, eddies)
• Infragravity waves and impacts
• Wave-current interactions


V. Numerical modeling of wave propagation 1 (07/02/2020 )
• Review of important physical processes to model
• Di erentiating phase-averaged and phase-resolving models
• Presentation of phase-averaged (spectral) models
Exercise: Running TOMAWAC spectral wave propagation model to simulate wave propagation
in the nearshore zone.


VI. Numerical modeling of wave propagation 2 (14/02/2020 )
• Review of the Navier-Stokes equations
• Mild-slope equations
• Boussinesq-type models
• Fully nonlinear potential
ow theory models
• Navier-Stokes models (Eulerian and Lagrangian approaches)
Class presentations: Students work in groups to present the di erent families of deterministic
wave propagation models.


VII. Dynamics of a body in waves (28/02/2020 )
• Nondimensional numbers (Re, Fr, KC) and similitude
• Experimental approaches
• Academic models:
{ Linear theory
{ Fully nonlinear potential
ow theory
{ Navier-Stokes equations
Exercise: Wave load estimation on an o shore wind turbine foundation.


VIII. Modeling wave-body interactions (06/03/2020 )
• External forces applied on a body in waves : Froude-Krylov, di raction, drag, lift, buoy-
ancy
• Equation of motions
• Morison equation (small bodies)
• Di raction-radiation problem (large bodies)
• Second and higher-order e ects
• Industrial codes and open research questions
Exercise: Use of wave scatter diagrams to calculate wave forces on a
oating body at the
selected o shore study site.


IX. Seminar about wave-structure interactions (presented by a representative from a company
working in the eld of marine renewable energy) (13/03/2020 )
Subject:
• Fixed and
oating o shore wind turbines
Objectives:
• Present pilot project, study site, existing and future technologies
• Discuss design criteria, challenges, current needs for research


X. Exam (20/03/2020 )

Format des notes

Numérique sur 20

Littérale/grade réduit

Pour les étudiants du diplôme Energy Environment : Science Technology & Management

Le rattrapage est autorisé (Note de rattrapage conservée)

    La note obtenue rentre dans le calcul de votre GPA.

    Pour les étudiants du diplôme Echanges PEI

    Le rattrapage est autorisé (Note de rattrapage conservée)
      Veuillez patienter