lgciv1051  2020-2021  Louvain-la-Neuve

Due to the COVID-19 crisis, the information below is subject to change, in particular that concerning the teaching mode (presential, distance or in a comodal or hybrid format).
5 credits
30.0 h + 30.0 h
Main themes
  • Hydrostatics and floats
  • Flow models: perfect fluid, viscous fluid, turbulent fluid
  • Headlosses: major and minor losses
  • Hydrodynamic forces
  • Flow over weirs (introduction)
  • Design of water distribution systems

At the end of this learning unit, the student is able to :

1 Contribution of the course to the program objectives (N°)
AA1.1, AA1.2, AA1.3, AA2.1, AA2.2, AA4.1, AA4.2, AA4.4, AA5.3
Specific learning outcomes of the course :
  • Design of reservoir and tanks under hydrostatic pressure load
  • Design of pressurized pipes and water distribution networks
  • Design of simple orifices and weirs
Transversal learning outcomes of the course:     
The evaluation of the course includes an oral assignment, which leads the students to develop his ability to synthetize his knowledges in order to write on the blackboard and present orally a clear and concise answer to a question on the course.

1. Introduction. Hydraulics in Civil Engineering. Properties of liquids. Pressure.
2. Hydrostatics
  • Differential equations and integrals, manometers, resulting pressure forces
  • Theory of floats
3. Basic principles
  • Fundamental equations, Lagrangian and Eulerian approaches
  • Displacements, deformation and rotations
4. Flow models :
  • Perfect fluid
             - Kinematics of irrotational flows: stream lines and velocity potential, application of complex variables, conformal mapping, applications to the flow around bridge piers in rivers, to weir flows and to hydrodynamic profiles
             - Dynamics: Euler equation, integral equations of Lagrange and Bernoulli
  • Laminar flow
             - Constitutive equation for Newtonian fluid (Stokes assumptions) and Navier-Stokes equations
             - Steady laminar flow in pipes: parabolic velocity profile and discharge integral (Poiseuille)
  • Turbulent flow
             - Turbulence : statistical approach, Reynolds analogy, Navier-Stokes-Reynolds-Boussinesq equations, velocity profile (smooth and rough boundaries)
             - Headlosses : eddy losses (Darcy, Moody-Nikuradse) and minor losses
5. Applications
  • Liquid-sold interactions, hydrodynamic forces
  • Orifices and weirs
  • Pressurized flow in pipes and water distribution networks (steady flow) 
              - Simple pipes
              - Branched networks
              - Meshed networks (Hardy-Cross) and nodal methods (Newton-   Raphson)

Teaching methods

Due to the COVID-19 crisis, the information in this section is particularly likely to change.

The activities are organised as follows:
  • Lectures for the main theoretical topics
  • Practical exercises on the different chapters; laboratory work (floats and pipes); small project work on the calculation of a water distribution network
Evaluation methods

Due to the COVID-19 crisis, the information in this section is particularly likely to change.

Continuous evaluation based on laboratories, projects and a written test about the exercises.
Oral exam for the theoretical part.
Online resources
Moodle website where different resources are made available : PowerPoint slides used for the lectures, videos, partial lecture notes, exercises with solutions, other useful documents (practical information about the exercises, schedule of the activities, ...)
Notes de cours
Streeter, "Fluid mechanics"
Lencastre, "Hydraulique générale"
Liggett, "Fluid mechanics"
Faculty or entity

Programmes / formations proposant cette unité d'enseignement (UE)

Title of the programme
Minor in Construction

Minor in Engineering Sciences: Construction (only available for reenrolment)

Specialization track in Construction