Fluid Mechanics II

Code:

EM0034

Acronym:

MF II

Keywords
Classification	Keyword
OFICIAL	Heat Transfer and Fluid

Instance: 2014/2015 - 1S

Active?	Yes
Responsible unit:	Fluids and Energy Division
Course/CS Responsible:	Master in Mechanical Engineering

Cycles of Study/Courses

Acronym	No. of Students	Study Plan	Curricular Years	Credits UCN	Credits ECTS	Contact hours	Total Time
MIEM	203	Syllabus since 2006/2007	3	-	6	58,5	162

Teaching language

Portuguese

Objectives

This course aims to acquaint students with the principles of conservation of mass and momentum in fluid flow, in mechanical engineering applications, namely in pipe flow (shear and turbulent), operation of pumps and centrifugal fans, measuring of fundamental flow variables, exterior flow and notions of incompressible flow. This course lasts a semester and it is a complementary course of Fluid Mechanics I (1st Semester)

Learning outcomes and competences

This course aims to acquaint students with the principles of conservation of mass and momentum in fluid flow, in mechanical engineering applications, namely in pipe flow (shear and turbulent), operation of pumps and centrifugal fans, measuring of fundamental flow variables, exterior flow and notions of incompressible flow.

Working method

Presencial

Program

COMPRESSIBLE FLOW
The speed of sound - Mach number. Perfect gases (review ). Steady flow, adiabatic and isentropic. Isentropic flow with section changes. Value flow / pressure drop an isothermal compressible flow. Examples of solution of compressible flows.

FLOW IN PIPES.
Elementary notions. Entry into an indoor outlet area. Development of the boundary layer.

Velocity profiles in a pipe of circular cross section. Loss of pressure in line smooth circular section pipes. Darcy- Weisbach.
Darcy friction coefficient. Exact solution for the laminar case.

Turbulent flow. Velocity profile: law wall logarithmic law , law of Blasius. Turbulent viscosity. Solution for turbulent flow in smooth pipes. Effect of roughness on pressure drop in pipelines. Colebrook equation. Moody diagram. Loss of localized charge. Equivalent length. Different types of problems involving losses. Determination of flow in pipelines. Sizing of pipes. Association of ducts in series and in parallel.

CENTRIFUGAL PUMPS AND FANS.
Elementary notions on the operation of pumps and fans. Rating. Triangles speeds. Estimation of the full height gauge and flow rate of a centrifugal pump. Characteristic curves of head height , power and performance. Pre -selection of a pump or fan. Operating point. Stability. Most convenient type curve for each application. Association of pumps in series and in parallel. Cavitation. Suction capacity of a pump. NPSH.

MEASURING THE SPEED OF FLOW AND PRESSURE.
Fixed area flow meters and variable area. Orifice plate. Venturi. Rotameter.
Turbine flow meters and electromagnetic. Gauge tubing and pressure transducers. Pitot and Prandtl probe. Thermal and laser - Doppler anemometry.

FLOW EXTERIOR.
Resultant force over a body immersed in a flow. Components of friction and pressure. Drag and lift forces. Aerodynamic coefficients.
Flow over a flat plate. Boundary layer. Integral solutions of the boundary layer.
Velocity profiles and entrainment.

 

Mandatory literature

Frank M. White; Fluid mechanics. ISBN: 978-0-07-128645-9
B. R. Munson, T. H. Okiishi, W. W. Huebsch and A. P. Rothmayer; Fluid Mechanics ( 7 edição), John Wiley \& Sons, Inc, 2013

Teaching methods and learning activities

The course is organized in 3 classes per week (lasting 1 hour and a half each). The contents are explained and practical classes typical problems are solved and consolidation aspects are discussed.

keywords

Technological sciences
Physical sciences > Physics > Classical mechanics > Fluid dynamics
Technological sciences > Engineering > Mechanical engineering > Propulsion systems engineering

Evaluation Type

Distributed evaluation with final exam

Assessment Components

Designation	Weight (%)
Exame	70,00
Participação presencial	30,00
Total:	100,00

Amount of time allocated to each course unit

Designation	Time (hours)
Estudo autónomo	98,00
Frequência das aulas	63,00
Trabalho laboratorial	2,00
Total:	163,00

Eligibility for exams

To attend the Lab class.

Calculation formula of final grade

Two evaluation tests to take place: at the begining and at the end of the evaluation period (between semesters)

FINAL CLASSIFICATION will be higher between the PROVISIONAL GRADE and the RE-SIT GRADE.

The impression from classes (number of presences, participation, etc.) may be used to adjust the final classification, with a limit of 1/20.

Students with a final grade above 16 (sixteen) values ​​may be submitted to the oral test.

IMPORTANT NOTE: The completion of the written test is subject to obtaining a minimum of 6/20 points in questionnaire in "Moodle" platform, which focuses on the fundamental concepts and principles of the discipline.

Examinations or Special Assignments

The distributed evaluation tests will take place in appropriate informatics rooms and will generally follow the rules of the currently designated "American test".

Classification improvement

Recurso exam

Observations

Language of instruction: Portuguese