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Astrophysical Fluid D ynamics

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  1. Astrophysical Fluid Dynamics

  2. AstrophysicalHydrodynamics iLecturer:Rien van de Weijgaert aRoom186,phone4086,email:weygaert@astro.rug.nl bOfficehours:Youarealwayswelcometocometomyofficeforshort questions. You can also make an appointment via email. iiTeachingassistant:Patrick Bos aOffice:189,phone:4053,email:pbos@astro.rug.nl iiiThepurposeofthecourseistocompletethefluidmechanicsbackground neededinastrophysics. ivAttendanceofasubstantionalfractionofcourselecturesisobligatory. vProblemsetsaremandatoryandconstituteabout25%ofthefinalgrade viWrittenexamattheendoftheterm

  3. Bibliography Thelecturenotesandhandoutsarethemainsourceofmaterial. However,thereareanumber ofgoodbooksthatthestudentcanuse toclarifysomeofthetopicsor forextramaterial. II. Interesting Books: ■ AstrophysicalFlows,J.PringleandA.King, CambridgeUniversity Press, nice concise introduction ■ FluidMechanics,LandauandLifshitz exceptionalbookbutof somewhathigherlevel. ■ An Introduction to Fluid Dynamics, G. K. Batchelor historic classic, widely regarded as a “bible” for the subject. Daunting at first sight, but lucid, thorough and reliable. ■ Gas Dynamics; Vol. II, Physics of Astrophysics, F. Shu Univ. Science Books, very good for astrophysical perspective. ■Album of Fluid Motion, van Dyke Beautiful photographs showing fluid in motion .

  4. AstrophysicalFluidMechanics Topics I Fluid Picture Book IIBasicfluid equations ofidealfluids III Inviscid Barotropic Flows: Kelvin Circulation Theorem Bernoulli Theorem IVIncompressibleFluids Compressiblefluids: V Waves VI Hydrodynamic Instabilities VII Shock Waves VIII. Viscousflows: Navier-StokesEqns. IX. Similaritysolutions X. Turbulence XI. Magnetohydrodynamics XII. Numerical (astro)hydrodynamics

  5. Fluid Picture Book

  6. Waves: sea & ocean waves

  7. Sound Waves:

  8. Sound Waves

  9. Cosmic Sound Waves Primordial Sound Ripples seen in WMAP Cosmic Microwave Background

  10. Cosmic Sound Waves

  11. Convection: Benard cells

  12. Convection: Earth Atmosphere

  13. Convective cells on solar surface

  14. Vortex & Vorticity

  15. Vortices in Shear Flow

  16. Tornados: Atmospheric Vortices

  17. Hurricanes: Atmospheric Vortices

  18. Vortices and Eddies: Jupiter’s turbulent atmosphere Vortices and Eddies: Jupiter’s turbulent atmosphere

  19. Voriticity Flow around Jupiter’s Red Spot

  20. Rayleigh-Taylor Instability 2 fluids of different density

  21. Rayleigh-Taylor Instability 2 fluids of different density

  22. Rayleigh-Taylor Instability fluids of different density

  23. Cosmic Rayleigh-Taylor Instability Crab Supernova Remnant

  24. Kelvin-Helmholtz Instability at the boundary of 2 shearing fluids

  25. Kelvin-Helmholtz Instability KH instability in cloud cover

  26. Kelvin-Helmholtz Instability KH instability in Saturn’s atmosphere

  27. Supersonic Motion & Shockwaves

  28. Supersonic Motion & Shockwaves

  29. Supersonic Motion & Shockwaves

  30. Cosmic Shockwave: Supernova remnant CasA

  31. Gas streams along magnetic field lines Solar surface TRACE