# Study-Unit Description

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CODE MEC2341

TITLE Fluid Mechanics 2

LEVEL 02 - Years 2, 3 in Modular Undergraduate Course

ECTS CREDITS 5

DEPARTMENT Mechanical Engineering

DESCRIPTION This study-unit will focus on the following topics:

- Inviscid flow. This section will explain the difference between rotational and irrotational flow. The fundamental explanation of circulation and vorticity will be introduced.

- Dimensional analysis and similarity. This will cover the Buckingham Pi theorem, similarity, dimensionless groups and model ship testing.

- Viscous flows over immersed bodies: This section will introduce boundary layer theory. The application of the momentum integral equation for laminar and turbulent boundary layers over flat plates will be explained. Boundary layers with pressure gradient shall also be included. Finally this section will explain drag and lift resulting from external flows on bodies having different geometries.

- Viscous Flow in ducts. This section will deal with both laminar and turbulent flow in pipes. The Darcy formula and the application of the Moody chart to determine the head loss and friction factor will be explained. The section will also address minor losses, multiple pipe systems, three reservoir problems and non circular ducts.

- Turbulence: This topic will introduce turbulence and will explain basic terms used to characterise turbulence levels in flow fields.

Study-unit Aims:

This study-unit is an intermediate unit in fluid mechanics applicable to a wide range of engineering practice.

Learning Outcomes:

1. Knowledge & Understanding:

By the end of the study-unit the student will be able to:
- differentiate between rotational and irrotational flows.
- apply the basic principles of Dimensional analysis and similarity for various engineering cases including lift/drag studies and model ship testing.
- explain the application of various dimensionless groups including the Reynolds, Froude, Mach and Weber numbers in fluid mechanics.
- apply the momentum integral equation to model the boundary layer formation over a flat plate. This will include both laminar and turbulent flow.
- distinguish between the various forms of drag, including pressure, skin friction and induced drag acting on immersed bodies.
- describe the dependence of the Reynolds number on the drag acting on bodies having simple geometries, including spheres, cylinders and plates.
- explain the influence of viscous flow separation on the drag and wake formation in immersed bodies.
- distinguish between different flow phenomena occurring over aerofoils at different angles of attack. This will included attached and separated flow conditions.
- distinguish between laminar and turbulent flow characteristics in pipes.

2. Skills:

By the end of the study-unit the student will be able to:
- compute the circulation and vorticity in an non-viscous flow field.
- apply the Kutta-Joukowski theorem to compute the lift generated on a body in an non-viscous flow.
- undertake experimental studies in fluid mechanics involving dimensional analysis and similar.
- derive from first principles relations between dimensionless groups for various application including aerofoils, flow in pipes and propellors.
- identify conditions where dynamic similarity cannot be achieved as in the case of model ship testing.
- model the boundary layer growth for laminar and turbulent flows over flat plates.
- identify experimental techniques to measure the boundary layer profiles.
- estimate the displacement and momentum thickness for boundary layer of a flat plate practical cases in engineering.
- model the drag over flat plates consisting of combined laminar and turbulent boundary layers through the use of Prandtl's approximation.
- identify varies experimental techniques, including the use of wind tunnels, for determining the lift and drag of various bodies.
- derive the pressure drag and lift over bodies in immersed flows using surface pressure measurements.
- interpret aerofoil data, distinguishing between the different characteristics of various aerofoil geometries.
- estimate the lift and drag of varies bodies based on the availability of lift and drag coefficient. data.
- calculate the friction losses in pipe, including secondary losses in valves and pipe bends. This will include both circular and non-circular pipes.
- calculate the power dissipated in friction in pipe flows.
- estimate the fluid flow rates in a pipe network connecting three reservoirs.
- compute the turbulence intensity to characteristise the level of turbulence in a fluid stream.
- use of software to conduct engineering analysis in fluid mechanics.

Main Text/s and any supplementary readings:

Fluid Mechanics
Frank M. White (Author)
McGraw-Hill International Edition
ISBN 978-0-07-128645-9

Fluid Mechanics, Fifth Edition
J.F. Douglas (Author); J.M. Gasiorek (Author); J.A. Swaffield (Author); L.B. Jack (Author)
Pearson - Prentice Hall (2005), ISBN-10:0131292935

STUDY-UNIT TYPE Lecture, Independent Study, Practicum & Tutorial

METHOD OF ASSESSMENT
 Assessment Component/s Assessment Due Resit Availability Weighting Practical SEM1 Yes 25% Online Examination (2 Hours) SEM1 Yes 75%

LECTURER/S Simon Mizzi

The University makes every effort to ensure that the published Courses Plans, Programmes of Study and Study-Unit information are complete and up-to-date at the time of publication. The University reserves the right to make changes in case errors are detected after publication.
The availability of optional units may be subject to timetabling constraints.
Units not attracting a sufficient number of registrations may be withdrawn without notice.
It should be noted that all the information in the description above applies to study-units available during the academic year 2020/1. It may be subject to change in subsequent years.

https://www.um.edu.mt/course/studyunit