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## HYDRODYNAMICS

CODE 66282 2019/2020 6 credits during the 2nd year of 8722 Naval Architecture and Marine Engineering (L-9) GENOVA ICAR/01 Italian GENOVA (Naval Architecture and Marine Engineering) 2° Semester This unit is a module of: AULAWEB

## OVERVIEW

Introductory course on fluid mechanics.

## AIMS AND CONTENT

### AIMS AND LEARNING OUTCOMES

The course objective is to provide  the students the basic knowledge on the motion of fluids and tools for the design and verification of simple hydraulic plants. Morover  more complex fluid problems will be adressed by using simplified models.

frontal lectures

### Fundamentals:

The Continuum assumption. Physical properties. Forces acting on a fluid. Pressure and stress in fluids. State equation.

### Nonflowing fluids:

Stress in a fluid at rest. Integral and differential equations for a fluid at rest. Pressure distribution in a constant density fluid and in an ideal gas subject to gravity. Pressure forces on plane surfaces. Pressure forces on curved surfaces. Pressure variation across interfaces. Surface tension.

### Kinematics of fluids

Eulerian and Lagrangian description of the flow. Material derivative. Velocity and acceleration. Transport Theorem.

### Fluid Dynamics

Stress in a moving fluid. Mass conservation principle and its integral formulation. Momentum principle and its integral formulation. Integral formulation of the angular momentum law. Applications of the integral formulation of fluid flow (Force of a jet on a surface, Borda losses, forces of a Pelton blade). Ideal fluids and Bernoulli theorem with applications ( efflux through a hole in the side of a tank, stagnation pressure, Pitot tube)

### Quasi-unidirectional incompressible flow

Characteristic quantities (averaged velocity, discharge, The Piezometric Head, Kinetic Head, Total Head). Continuity equation. Momentum equation. Steady uncompressible flow in circular ducts. Bernoulli Theorem. Flow measurements devices (Venturi meter, thin plate orifice, flow nozzle). Fundamentals on hydraulics networks.

### Dimensional Analysis, model testing and similitude

Dimensional analysis and Pi theorem. Applications (drag and lift on a body moving in a fluid).Model testing and similitude

### Fundamentals on boundary layer

1. Teacher's lectures notes(in italian)

2. Marchi – Rubatta: Meccanica dei fluidi: principi ed applicazioni idrauliche, UTET 1981

3. Ghetti: Idraulica Libreria Cortina. Padova 1980

## TEACHERS AND EXAM BOARD

### Exam Board

MARCO LEPIDI (President)

GIOVANNA VITTORI (President)

frontal lectures

September 19th

HYDRODYNAMICS

## EXAMS

### EXAM DESCRIPTION

The exam consists of a first written part (1 exercise) and an oral part.

The written test will be corrected immediately after the conclusion of the same.

In order to access the oral part it is necessary to have passed the written test.

The oral part will take place immediately after the correction and passing the written test.

It is not possible to repeat the exam in the session following the one in which the student did not pass.

### Exam schedule

Date Time Location Type Notes
15/01/2020 08:30 GENOVA Scritto + Orale
19/02/2020 08:30 GENOVA Scritto + Orale
10/06/2020 08:30 GENOVA Scritto + Orale
23/06/2020 08:30 GENOVA Scritto + Orale
01/07/2020 08:30 GENOVA Scritto + Orale
15/07/2020 08:30 GENOVA Scritto + Orale
09/09/2020 08:30 GENOVA Scritto + Orale