Kursi · Graduate

Fluid Dynamics

From the continuum hypothesis to the regularity theory of the incompressible Navier-Stokes equations.

8 jedinica 22 lekcije 131 pitanja 180 minuta

A mathematical course in fluid dynamics. The first half derives the equations of motion: fields and the material derivative, conservation of mass, vorticity and circulation, the stress tensor, the Euler equations, potential flow, and the incompressible Navier-Stokes equations with their exact solutions and scaling. The second half reads the equations as mathematics: Stokes flow and boundary layers, the vorticity equation and vortex stretching, the energy equality, the Kolmogorov theory of turbulence, the Cauchy problem and the Leray projection, Leray-Hopf weak solutions, regularity criteria and partial regularity.

It is for readers who know multivariable calculus, linear algebra and the basic theory of partial differential equations. Each unit ends with a quiz of computations, conceptual questions and short proofs; the final exam covers the whole course.

Dolazi poslije: Partial-Differential-Equations, Multivariable-Calculus, Linear-Algebra

Kurs

  1. Describing a flow

    3 lekcije
    The continuum hypothesis and fieldsEulerian and Lagrangian descriptions, the material derivativeKinematics: streamlines, pathlines and streaklines
    Prijavite se da biste odgovorili na kviz

  2. Mass, the stream function and vorticity

    3 lekcije
    Conservation of mass, the continuity equation and incompressibilityThe stream function and two-dimensional incompressible flowVorticity, circulation and Kelvin's circulation theorem
    Prijavite se da biste odgovorili na kviz

  3. Stress, pressure and ideal flow

    4 lekcije
    The stress tensor and Cauchy's momentum equationHydrostatics and pressureThe Euler equations and Bernoulli's theoremPotential flow and the Laplace equation
    Prijavite se da biste odgovorili na kviz

  4. The Navier-Stokes equations

    3 lekcije
    Viscosity, Newtonian fluids and the Navier-Stokes equationsExact solutions: Couette, Poiseuille and Stokes' first problemDimensional analysis, the Reynolds number and the scaling symmetry
    Prijavite se da biste odgovorili na kviz

  5. Slow flow and thin layers

    2 lekcije
    Stokes flow at low Reynolds numberBoundary layers
    Prijavite se da biste odgovorili na kviz

  6. Vorticity, energy and turbulence

    3 lekcije
    The vorticity equation and vortex stretchingEnergy: the energy equality, dissipation and enstrophyTurbulence and Kolmogorov 1941 (a heuristic theory)
    Prijavite se da biste odgovorili na kviz

  7. The Cauchy problem and weak solutions

    2 lekcije
    The Cauchy problem: the Leray projection and local existenceWeak solutions (Leray-Hopf) and Sobolev spaces for fluids
    Prijavite se da biste odgovorili na kviz

  8. Regularity and criticality

    2 lekcije
    Regularity criteria: Ladyzhenskaya-Prodi-Serrin and Beale-Kato-MajdaPartial regularity (Caffarelli-Kohn-Nirenberg) and criticality: 2D versus 3D
    Prijavite se da biste odgovorili na kviz

Završni ispit

Pitanja iz svake jedinice, najteža su zadnja. Utipkani odgovori su označeni sistemom algebre; dokaze i fotografirane radove čita model; onda osoba pregleda cijeli rad prije nego što se objavi vaš rezultat. Polažete i dobivate certifikat sa vlastitom poveznicom. Označi prolaz: 70%.

Prijavi se

Cijene

Course pass

$39

Svaki kviz, završni ispit sa jednom ponovnom provjerom, i 20 provjera vlastitog rada, za jedan predmet.

Jedan završni ispit

$15

Jedno sjedenje završnog predmeta, ocjenjeno i pregledano, za nekog tko već zna materijal i želi da ga ispita.

Svaki put

$19/mj

Svi kvizovi i završnice u svakom tečaju (dva završnica po tečaju mjesečno) i 100 radnih provjera mjesečno. Odustani sa svog računa.

Radne provjere

$9

Deset provjera: učitaj fotografiju bilo kojeg rada, ili ga napiši, i vidi gdje je pošlo po zlu.

Kursevi su uskoro dostupni za kupovinu. Lekcije i prvi kviz svakog kursa su sada otvoreni.

Provjerite dio svog rada