# 88296 - COASTAL AND MARINE FLUID DYNAMICS

### SDGs

L'insegnamento contribuisce al perseguimento degli Obiettivi di Sviluppo Sostenibile dell'Agenda 2030 dell'ONU.

## Conoscenze e abilità da conseguire

The course will introduce and describe the processes that characterize the oceanic environment, as wind, tide, wave and currents, and their loads and interaction with the structures. In particular the student will be able to analyze the sea conditions (waves, currents).

## Programma/Contenuti

The course will introduce and describe the processes that characterize the oceanic environment, as wind, tide, wave and currents, their loads and interaction with the structures and basics on the conversion of the marine renewable resources in energy.

The course is organized in 3 parts:

Part 1 The sea environment
Part 2 Ocean Engineering
Part 3 Marine renewable energy

Introduction of the Course in Ocean engineering

1.The Sea environment
Wind. The geostrophic approximation. Geostrophic wind. Measure of the wind. Force of the wind on the structures.
Sea water Level: astronomic tides, storme surges.
Currents.
Sea Wave. Linear Theory. Dispersion relationship. Shallow water and deep water approximation. Exercises.
Irregular waves- Wave statistics, wave spectra
Non-linear theory of waves
Wave transformation from offshore to onshore: shoaling-refraction -diffraction
Tsunami
Exercise on the ocean environment

2. Ocean engineering
Interaction of waves with Offshore structures: The calculation of forces on ocean structures:
-Structural element much smaller than wavelength – drag and inertia forces.
-Structural element comparable with wavelength – diffraction forces.
Application:Design of an ocean structure
Floating Structures: Wave forces & motions theory
Floating breakwaters, Offshore TLP Sparbuoys

3. Marine renewable energy

Principles of energy conversion from the sea,

Wave energy conversion. WEC typology

Other marine resource conversion
Design of a point absorber

## Testi/Bibliografia

R.G. Dean & R.A. Dalrymple, Water wave mechanics for engineers and scientists, Adv. Series on Ocean Engineering – vol. 2, World Scientific

Materiale verrà distribuito durante il corso.

## Metodi didattici

The course is taught through lectures. Part of them are dedicated to the solution of practical problems, that will be developed at the computer.
Exercises with practical activities (i.e. computer programming and use of specific software) using Matlab and excel:
- statistics of extreme waves;
- dispersion relationship for evaluating wave transformation from off-shore to in-shore;
- reconstruction of the typical annual wave climate;
-Design of an ocean structure;
- Design of a point absorber.
Some lessons will be held by well known professionists in the research and design of coastal and ocean structures.

## Modalità di verifica dell'apprendimento

The student will prepare for the exam a report of the exercises and simple application design that were developed during the course.

The preparation of the student will be assessed through an oral colloquium whose duration is about 30 minutes.

Higher grades will be awarded to students who demonstrate an outstanding understanding of the subject, a high ability for critical application, and a clear and concise presentation of the contents.

To obtain a passing grade, students are required to at least demonstrate a knowledge of the key concepts of the subject, some ability for critical application, and a comprehensible use of technical language .

A failing grade will be awarded if the student shows knowledge gaps in key-concepts of the subject, inappropriate use of language, and/or logic failures in the analysis of the subject.

## Orario di ricevimento

Consulta il sito web di Renata Archetti

Consulta il sito web di Alberto Montanari

Consulta il sito web di Armando Brath