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mod10lec51 - Magnetohydrodynamics (MHD): Plasma beta, force-free fields and potential configurations
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Classroom Contents
Fluid Dynamics for Astrophysics
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- 1 Fluid Dynamics for Astrophysics
- 2 mod01lec01 - Introduction to the course
- 3 mod01lec02 - Continuum hypothesis, distribution function and stress-viscosity relation
- 4 mod01lec03 - Continuum hypothesis, distribution function and stress-viscosity relation - Recap
- 5 mod01lec04 - Fluid Kinematics
- 6 mod01lec05 - Fluid Kinematics - Recap
- 7 mod02lec06 - Conservation laws: Mass conservation and incomprehensibility
- 8 mod02lec07 - Conservation laws: Momentum conservation and Euler equation
- 9 mod02lec08 - Conservation laws - Recap
- 10 mod02lec09 - Potential flows
- 11 mod02lec10 - Bernoulli constant, its applications and voracity equation
- 12 mod03lec11 - Recap - Potential flows, Bernoulli constant and its applications
- 13 mod03lec12 - Voracity dynamics -- Kelvin's voracity theorem and Magus effect
- 14 mod03lec13 - Navier-Stokes equation
- 15 mod03lec14 - Navier-Stokes equation (contd.) and energy equation
- 16 mod03lec15 - Energy equation in a conservative form
- 17 mod03lec16 - Boundary conditions in Navier-Stokes equation, d'Alembert's paradox
- 18 mod03lec17 - Poiseuille flow, deriving viscosity from microscopics
- 19 mod04lec18 - Dimensionless numbers -- Mach number, Reynolds number
- 20 mod04lec19 - Dimensionless numbers
- 21 mod04lec20 - Reynolds number and dynamic similarity
- 22 mod04lec21 - Reynolds number recap, Low Re flows, and drag on a sphere (Stokes law)
- 23 mod04lec22 - High Re flows -- turbulent drag law, vortex shedding and drag crisis
- 24 mod05lec23 - Lift on a body, introduction to compressible flows
- 25 mod05lec24 - Compressible flows -- derivation of sound speed and dispersion relation
- 26 mod05lec25 - Subsonic and supersonic flows
- 27 mod05lec26 - Propagation of sonic information, shock tube problem and piston problem
- 28 mod05lec27 - Criterion for neglect of compressibility, method of characteristics
- 29 mod06lec28 - Shock thickness
- 30 mod06lec29 - Shock thickness recap, shock jump conditions
- 31 mod06lec30 - Shock jump conditions (contd), transonic 1D flows, converging/diverging channels
- 32 mod06lec31 - Coverging/diverging channels, de Laval nozzle and its application to astrophysical jets
- 33 mod06lec32 - Spherically symmetric transonic flows
- 34 mod06lec33 - Spherically symmetric transonic flows (contd)
- 35 mod07lec34 - Solar wind : Parker's solution
- 36 mod07lec35 - Solar wind : Modifications in Parker's solution
- 37 mod07lec36 - Spherical accretion onto a compact object : Eddington luminosity and accretion rate
- 38 mod07lec37 - Spherical accretion onto a compact object : Solutions for flow properties
- 39 mod07lec38 - Spherical accretion (contd), disk accretion--Roche lobe overflow
- 40 mod08lec39 - Disk accretion : Mass conservation and vertical hydrostatic equilibrium
- 41 mod08lec40 - Disk accretion : Removal of angular momentum, Shakura-Sunyaev viscosity parameter
- 42 mod08lec41 - Disk accretion : Viscous dissipation and the energy equation, two-temperature criterion
- 43 mod08lec42 -Particle acceleration in astrophysical settings:Shocks & non-thermal energy distribution
- 44 mod08lec43 - Particle acceleration in astrophysical settings : Diffusive shock acceleration
- 45 mod09lec44 - Spherical blast waves : Bomb explosion and supernova explosion
- 46 mod09lec45 - Spherical blast waves : Sedov -Taylor solution
- 47 mod09lec46 - Spherical blast waves : Sedov - Taylor solution (contd.)
- 48 mod09lec47 - Magnetohydrodynamics (MHD) : Introduction
- 49 mod09lec48 - Magnetohydrodynamics (MHD) : The induction equation
- 50 mod10lec49 - Magnetohydrodynamics(MHD):Currents in MHD, momentum equation and magnetic stress tensor
- 51 mod10lec50 - Magnetohydrodynamics (MHD) : Magnetic stresses and magnetic buoyancy
- 52 mod10lec51 - Magnetohydrodynamics (MHD): Plasma beta, force-free fields and potential configurations
- 53 mod10lec52 - Magnetohydrodynamics (MHD) : Magnetic flux-freezing
- 54 mod10lec53 - Magnetohydrodynamics (MHD) : Magnetic flux-freezing (contd.), magnetic dynamos
- 55 mod10lec54 - Magnetohydrodynamics (MHD) : Dynamo theory
- 56 mod11lec55 - Magnetohydrodynamics (MHD) : Waves in MHD - Alfven waves
- 57 mod11lec56 - Magnetohydrodynamics (MHD) : Waves in MHD - Alfven waves and magnetosonic waves
- 58 mod11lec57 - Magnetohydrodynamics (MHD) : Waves in MHD - Magnetosonic waves
- 59 mod11lec58 - Magnetohydrodynamics (MHD) : Shocks in MHD
- 60 mod11lec59 - Magnetohydrodynamics (MHD) : Shocks in MHD - Shock jump conditions
- 61 mod12lec60 - Non-ideal MHD : Introduction to magnetic reconnection
- 62 mod12lec61 - Non-ideal MHD : Magnetic reconnection - The Sweet-Parker model
- 63 mod12lec62 - Non-ideal MHD : Magnetic reconnection - The Petscheck model
- 64 mod12lec63 - Sun's atmosphere : Solar corona and the coronal heating problem
- 65 mod12lec64 - Solar eruptions : Coronal Mass Ejections (CMEs) and solar flares