Scheda programma d'esame
FLUID DYNAMICS
FULVIO CORNOLTI
Academic year2020/21
CoursePHYSICS
Code289BB
Credits6
PeriodSemester 2
LanguageItalian

ModulesAreaTypeHoursTeacher(s)
FLUIDODINAMICAFIS/03LEZIONI48
FRANCESCO CALIFANO unimap
FULVIO CORNOLTI unimap
WALTER DEL POZZO unimap
Learning outcomes
Knowledge

Kinematics of continuous media, principles of constitutive  equations of the dynamics of continuous media . Transport in simple and composite  continuous media. Navier-Stokes equations. Applications to different  fields of fluid dynamics: lift and drag, sound waves, gravity waves, non linear waves, simple waves, shocks, instabilities. 

Assessment criteria of knowledge

Oral exam.

Skills

 

 

 

Acquisition of the mathematical  tools typical of basic fluid dynamics and applocations to simple problems.

Assessment criteria of skills

Oral exam

Prerequisites

Complex analysis,multidimensional analysis, differential operators, tensorial calculus.

Syllabus

The concept of fluid element, limits due to granularity of matter: diffusion. Thermodynamic description of surface forces. LTE hipothesis and its limits.

Kinematics of continous media as one parameter maps of the space in itself. The Jacobian and volume variations. Lagrangean and Eulerian represetation of fluid variables. Velocity in eulerian representation, tensor of infinitesimal deformations. Time derivatives of integrals on moving domains. volumes, surfaces and lines. Material derivative. Transport of intensive quantities. Mass and momentum  transport  for simple,  composit with external sources. Macroscopic mass and momentum diffusion. link tu microscopic transport. Microscopic interpretation of mass and momentum transport. Examples.

Transport of kinetic and internal energy. Entropy transport in irreversible processes: matter, momentum and heat fluxes.

 Euler equation for ideal fluids in external potential.Equilibrium in static fluids: stratification of thermodynamic quantities.

Fluid  dynamics in isoentropic approximation.Vorticity and its transport in ideal fluids. Beroulli function, and Bernoulli theorem in different configurations.

Time derivative of surfale and line intehrals on moving domaains. Thomson and Kelvin theorem on  velocity circuletion. Helmoltz theorems about vorticity.

2D ideal incompressible fluid dynamics The complex potential, Blasius and Kutta- Joukowsky theorems on lift and drag. Conformal mapping and calculus of lift and drag on symmetrical wings.

Motions and stabiòlity of linear vortices.

Viscous fluid, Couchy tensor, Navier- Stokes equations for incompressible fluids. Boundary layer separation in Prantl theory. Application to symmetric wings.Waves in fluids: sound in homogeneous media, dissipative decay; nonlinear effects: frequency doublng, many waves interaction, Manley-Rowe relations for three wave dacay. Wave breaking. Simple waves, dissipative and dispersive solitons.

Shock wave, Hugoniot adiabat, burning shocks and detonation shocks. Waves in inhomogeneous media: cutoff and resonance.

Serface waves, Kelvin-Helmoltz and Rayleigh-Taylor instabilities.

Waves in shallow water. Applications.

 

Bibliography

Notes of the lactures by the teacher (on demand).

Mechanics of continuous media , Landau and Lifchitz

Assessment methods

oral exam

Updated: 02/08/2020 10:42