|  Fluid Dynamics / Hydrodynamics | 
In General > s.a. history of physics;
  physics teaching; sound [including
  differential geometry viewpoint]; symmetry breaking [history].
  * History: It is the field
    in which people have been working for the longest time with the most meagre
    results; The problem is that at the basic level it involves an infinite
    number of ordinary differential equations, and we know that even a finite number
    of ordinary differential equations have a peculiar behaviour, like strange
    attractors; We can understand this mathematically from the fact that the Euler
    equation came from an approximation of the fluid by small fluid elements.
  * And fundamental physics:
    In principle one would start from the Boltzmann equation and derive from it
    the Navier-Stokes equation.
  * Formalism: The motion of
    a Newtonian incompressible fluid is described by the Navier-Stokes equations
    of momentum conservation and the continuity equation, in the absence of density
    variations, magnetic fields and heat sources; To solve them, usually one assumes
    a finite volume V, and prescribes the velocity vector u
    on ∂V.
  * Status: 1987, In the
    compressible fluid case, not even the 1D problem is understood.
  * Decomposition: Motion of a
    continuous fluid can be decomposed into an "incompressible" rearrangement
    which preserves volumes (described by the Euler equation), and a gradient map
    that transfers fluid elements in a way unaffected by any pressure or elasticity
    (described by the Zel'dovich approximation, used to model the motion of a
    self-gravitating fluid in cosmology).
  * Hydrodynamical approach:
    It works for \(\Delta t \gg\) collision time and lengths \(\Delta x \gg\)
    collision length.
  @ Books: Goldstein 60;
    Von Mises & Friedrichs 71;
    Marchioro & Pulvirenti 94;
    Massey 06;
    Kambe 07;
    Buresti 12;
    in Thorne & Blandford 15;
    Bernard 15;
    Regev et al 16 [in physics and astrophysics].
  @ Geometric: de Montigny JPA(03);
    Kambe 09 [and dynamical systems];
    Gawlik et al PhyD(11)-a1010 [variational discretizations of complex-fluid dynamics];
    Rajeev 18.
  @ General references: issue JMP(07)#6 [mathematical aspects];
    García-Colín et al PRP(08) [beyond the Navier-Stokes equation, Burnett hydrodynamics];
    López-Arias EJP(12)-a1103 [Thomas Young and the behavior of air streams].
  @ As limits of particle systems: Sasa PRL(14) [hydrodynamics from the Hamiltonian description];
    Dostoglou et al JMS(15)-a1406 [in the limit of infinitely-many particles];
    Alonso-Blanco a2004 [intermediate integrals and Euler equations];
    > s.a. computational physics.
  @ Equation of state: Friedman et al PRL(89) [and astrophysics];
    Eliezer et al 02;
    Silbergleit ap/02 [Klein-Gordon field in cosmology].
  > Other general topics: see Continuous Media;
    Emergence [vs molecular dynamics]; fluctuations;
    Navier-Stokes Equation and Euler Equations.
  > Online resources:
    see Wikipedia page.
Relativistic Hydrodynamics
  @ General references: in Dixon 78;
    Geroch et al JMP(01)gq [Lagrange formulation];
    Sklarz & Horwitz FP(01) [continuous media, including viscosity];
    Ivanov a0905-conf [geometrical modeling];
    Chen & Spiegel CQG(11)-a1107 [causal];
    Kovtun JPA(12) [hydrodynamic fluctuations];
    Rezzolla & Zanotti 13;
    Disconzi Nonlin(14)-a1310 [viscous];
    García-Perciante et al JSP(15)-a1406 [stability];
    Christodoulou & Lisibach a1411 [self-gravitating, phase transition];
    Jensen et al JHEP(18)-a1701 [effective field theory, superspace formalism];
    > s.a. solution methods
      for einstein's equation [fluid-gravity correspondence]; time in gravity.
  @ Dissipative: in Dixon 78;
    Geroch & Lindblom PRD(90),
    AP(91);
    Geroch JMP(95);
    Kreiss et al JMP(97)gq;
    Anile et al gq/98;
    Calzetta & Thibeault PRD(01) [interacting with scalar field];
    Geroch gq/01 [re hyperbolic theories of dissipation];
    Silva et al GRG(02)gq [evolution];
    Molnár et al EPJC(10)-a0907 [numerical methods];
    Andersson & Comer CQG(15)-a1306 [covariant action principle];
    Disconzi et al IJMPD-a1510 [first-order formulation, and cosmology];
    Crossley et al a1511 [in curved spacetime, effective field theory];
    Pimentel et al GRG(16)-a1604 [energy-momentum tensor];
    Gavassino et al a2003 [bulk viscosity].
  @ In curved spacetimes: Duggal JMP(89);
    Krisch & Glass JMP(02)gq/01,
    PRD(09)-a0908 [anisotropic];
    Love & Cianci PTRS(11)-a1208 [using the Chapman-Enskog procedure];
    Bemfica et al a1708,
    a2009 [viscous, coupled to gravity];
    Van den Bergh PRD(17)-a1710 [rotating and twisting];
    > s.a. FLRW spacetimes.
  > Related topics: see computational physics;
    gravitating matter [fluid spheres]; Maxwell-Lorentz
    Equations; non-equilibrium systems [second law].
Other Types
  > s.a. condensed matter [liquids]; gas;
  membranes; molecular physics [polymer fluids];
  perfect fluid; superfluids;
  Viscoelasticity.
  * Incompressible:
    A fluid with equation of state ρ = constant.
  * Barotropic:
    A fluid whose density is a function only of pressure, ρ
    = ρ(p), important in astrophysics; They include polytropic fluids;
    > s.a. Wikipedia page.
  * Non-perfect fluids: There
    are heat-conducting, viscous, particle-creating, and/or anisotropic ones.
  *  Complex fluids: Binary
    mixtures in which two phases coexist; Examples are solid–liquid (suspensions
    or solutions of macromolecules such as polymers), solid-gas (granular), liquid-gas
    (foams) and liquid-liquid (emulsions); They exhibit unusual mechanical responses
    to applied stress or strain, including transitions between solid-like and fluid-like
    behavior, due to the geometrical constraints that the phase coexistence imposes and
    characteristics such as high disorder, caging, and clustering on multiple length scales;
    > s.a. Wikipedia page.
  * Lattice gas models: Computer
    simulations (notably 2D hexagonal lattice).
  @ Dissipative: Rajeev JPCS(13)-a1004 [geometric formulation];
    Andersson & Comer CQG(06) [and superfluid neutron stars];
    Glorioso et al JHEP(17)-a1701 [effective field theory].
  @ Hyperfluids: Obukhov & Tresguerres PLA(93)gq/00;
    Obukhov PLA(96)gq/00.
  @ Complex fluids:
    Gast & Russel PT(98)dec;
    Shen & Cheung PT(10)sep;
    Zenit & Rodríguez-Rodríguez PT(18)nov [bubbly drinks].
  @ Quantum fluids:
    Tsubota et al PRP(13) [rev];
    Gripaios & Sutherland PRL(15)-a1406;
    Suto JMP(15)-a1504 [probability distribution of the total momentum];
    > s.a. bose-einstein condensation; condensed matter;
      gas; ideal gas; superfluids.
  @ Related topics: Roberts CEJP(11)ht/04 [fluid-like generalization of membranes];
    Rajeev IJMPA(08)-a0705 [with short-distance cutoff, non-commutative];
    Doering et al JMP(12)#11 [incompressible, turbulence and mixing];
    news pw(18)jan [active fluids, and quantum mechanics].
Related Concepts and Phenomenology > s.a. Bernoulli Equation;
  Continuity Equation; Circulation Theorem;
  critical phenomena; Equation of State.
  * Plateau-Rayleigh instability:
    A fluid cylinder longer than its circumference in energetically unstable to breakup.
  @ Stability: Plateau 1873, Rayleigh PLMS(1878);
    Chandrasekhar PRS(64) [liquid drops];
    Joseph 76; > s.a. Instabilities.
  @ Ordinary physics: Burgess et al PRL(01)
    + pn(00)dec [dripping];
    Lohse PT(03)feb [bubbles].
  @ Microscale description: Celani et al PRL(12) [failure of the overdamped approximation and entropic anomaly].
  @ Smooth Particle Hydrodynamics: Inutsuka JCP(02)ap;
    Cossins PhD(10)-a1007 [rev];
    Price JCP(11)-a1012 [and magnetohydrodynamics];
    Springel ARAA(10)-a1109 [in astrophysics];
    Chiaki & Yoshida MNRAS(15)-a1504 [particle splitting based on Voronoi diagrams];
    Price et al PASA(18)-a1702 [in astrophysics].
  @ Cosmology, structure formation:
    Bouchet ap/96-ln [perturbations];
    Gibson JFE(00)ap [turbulence, viscosity, etc];
    Mohayaee & Sobolevskii PhyD(08)-a0712;
    Cervantes-Cota & Klapp a1306-ch [rev].
  @ Astrophysics emphasis:
    Thompson 06;
    Ogilvie JPP(16)-a1604-ln [and magnetohydrodynamics].
  @ Astrophysics, instabilities: Hartle & Sharp ApJ(67);
    Friedman & Schutz ApJ(75);
    Bardeen et al ApJ(77);
    Friedman CMP(78);
    Hiscock & Lindblom AP(83),
    PRD(85);
    Semelin et al PRD(01)ap/99.
  > Other phenomenology:
    see chaos; dark energy;
    electromagnetism with matter; Floating;
    Flux [flow rate]; Froude Number;
    gravitational collapse; magnetism [magnetohydrodynamics];
    meta-materials [suspensions]; phase transitions;
    Pressure; relativistic cosmology;
    Rheology; thermodynamics;
    turbulence [including Magnus, Reynolds Number, examples];
    viscosity [including bound]; wave phenomena.
  > Other related  topics:
    see Adiabatic Transformation; bianchi I
    models [effects]; energy-momentum tensor; Enstrophy;
    knots; Knudsen Number.
 main page
  – abbreviations
  – journals – comments
  – other sites – acknowledgements
  send feedback and suggestions to bombelli at olemiss.edu – modified 3 oct 2020