# Physics of fluids

lphys1213  2020-2021  Louvain-la-Neuve

Physics of fluids
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
37.5 h + 30.0 h
Q2
Teacher(s)
Deleersnijder Eric; Legat Vincent;
Language
French
Prerequisites

The prerequisite(s) for this Teaching Unit (Unité d’enseignement – UE) for the programmes/courses that offer this Teaching Unit are specified at the end of this sheet.
Main themes
This teaching unit aims to enable one to understand the basic principles of fluid dynamics and the associated reactive transport processes (kinematics, budget of mass, momentum and energy) and comprehend important flow regimes (incompressible viscous, geophysical and free-surface flows).
Aims
 At the end of this learning unit, the student is able to : 1 a. Contribution of the teaching unit to the learning outcomes of the programme AA1: 1.1, 1.4, 1.5 AA2: 2.3, 2.4 AA3: 3.4, 3.5 AA6: 6.3 b. Specific learning outcomes of the teaching unit At the end of this teaching unit, the student will be able to: 1. understand the difference between physical principles and phenomenological laws; 2. assess the reliability and coherence of mathematical models; 3. estimate relevant orders of magnitude in a mathematical model based on partial differential equations; 4. study the budget of physical quantities on fixed or moving control volumes; 5. select the mathematical models relevant to specific flows; 6. solve simple fluid dynamics and reactive transport problems; 7. grasp the specific aspects of geophysical and free-surface flows.
Content
Basic assumptions of continuum mechanics.
Lagrangian and Eulerian descriptions.
Mass balance, momentum balance, energy and entropy balance.
Non-inertial reference frame.
Dynamic similitude: dimensionless parameters.
Incompressible irrotationnal flows.
Incompressible viscous flows.
Flows with two space scales: lubrication and boundary layers theory.
Natural and forced convection: Boussinesq approximation.
Reactive flows.
Geophysical flows: geohydrodynamics equations, dimensionless parameters, idealised models.
Free surface flows: 1D and 2D models, linear and non-linear waves, tides, tsunamis.
Teaching methods

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

Lecture courses.
Exercise sessions aimed at solving problems as realistic as possible.
Invitation to self learning.
Evaluation methods

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

Continuous assessment of knowledge based on homeworks, the development of codes in MATLAB (or any other relevant programming language) and/or oral presentations.
Written exam consisting of problems.
Bibliography
Cushman-Roisin B. and J.-M. Beckers, 2011 (2nd ed.), Introduction to Geophysical Fluid Dynamics - Physical and Numerical Aspects, International Geophysics Series (Vol. 101), Elsevier, Amsterdam, 828 pages.
Kundu P., I. Cohen and D. Dowling, 2015 (6th ed.) (ou éditions précédentes), Fluid Mechanics, Elsevier, Amsterdam, 928 pages.
Faculty or entity
PHYS

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

Title of the programme
Sigle
Credits
Prerequisites
Aims
Bachelor in Physics

Minor in Physics