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Turbulence Transport Model Applied Space Physics And Astrophysics Laxman Adhikari Computational Physics

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Page 1: Turbulence Transport Model Applied Space Physics And ...Space Physics And Astrophysics Laxman Adhikari Computational Physics . Background -Magnetohydrodynamics (MHD)Turbulence: Magneto

Turbulence Transport Model Applied

Space Physics And Astrophysics

Laxman Adhikari

Computational Physics

Page 2: Turbulence Transport Model Applied Space Physics And ...Space Physics And Astrophysics Laxman Adhikari Computational Physics . Background -Magnetohydrodynamics (MHD)Turbulence: Magneto

Background

-Magnetohydrodynamics (MHD)Turbulence: Magneto – magnetic fluid

hydro - Liquid

dynamics - movement

-MHD deals with dynamics of electrically conducting fluids.

-MHD Turbulence is observed when the Reynolds number of magnetofluid is large.

Page 3: Turbulence Transport Model Applied Space Physics And ...Space Physics And Astrophysics Laxman Adhikari Computational Physics . Background -Magnetohydrodynamics (MHD)Turbulence: Magneto
Page 4: Turbulence Transport Model Applied Space Physics And ...Space Physics And Astrophysics Laxman Adhikari Computational Physics . Background -Magnetohydrodynamics (MHD)Turbulence: Magneto

Background -The spectrum of magnetic/velocity

fluctuation is kolmogorov.

Page 5: Turbulence Transport Model Applied Space Physics And ...Space Physics And Astrophysics Laxman Adhikari Computational Physics . Background -Magnetohydrodynamics (MHD)Turbulence: Magneto

Undriven Models

Page 6: Turbulence Transport Model Applied Space Physics And ...Space Physics And Astrophysics Laxman Adhikari Computational Physics . Background -Magnetohydrodynamics (MHD)Turbulence: Magneto

Stream Interaction Driven Models

Page 7: Turbulence Transport Model Applied Space Physics And ...Space Physics And Astrophysics Laxman Adhikari Computational Physics . Background -Magnetohydrodynamics (MHD)Turbulence: Magneto

Pickup Ion Driven Models

Page 8: Turbulence Transport Model Applied Space Physics And ...Space Physics And Astrophysics Laxman Adhikari Computational Physics . Background -Magnetohydrodynamics (MHD)Turbulence: Magneto

Undriven Models(No Mixing)

Page 9: Turbulence Transport Model Applied Space Physics And ...Space Physics And Astrophysics Laxman Adhikari Computational Physics . Background -Magnetohydrodynamics (MHD)Turbulence: Magneto

Undriven Models (Strong Mixing)

Page 10: Turbulence Transport Model Applied Space Physics And ...Space Physics And Astrophysics Laxman Adhikari Computational Physics . Background -Magnetohydrodynamics (MHD)Turbulence: Magneto

Stream Interaction Driven Models (No Mixing)

Page 11: Turbulence Transport Model Applied Space Physics And ...Space Physics And Astrophysics Laxman Adhikari Computational Physics . Background -Magnetohydrodynamics (MHD)Turbulence: Magneto

Stream Interaction Driven Models (Strong Mixing)

Page 12: Turbulence Transport Model Applied Space Physics And ...Space Physics And Astrophysics Laxman Adhikari Computational Physics . Background -Magnetohydrodynamics (MHD)Turbulence: Magneto

Pickup Ion Driven Models (No Mixing)

Page 13: Turbulence Transport Model Applied Space Physics And ...Space Physics And Astrophysics Laxman Adhikari Computational Physics . Background -Magnetohydrodynamics (MHD)Turbulence: Magneto

Pickup Ion Driven Model (Strong Mixing)

Page 14: Turbulence Transport Model Applied Space Physics And ...Space Physics And Astrophysics Laxman Adhikari Computational Physics . Background -Magnetohydrodynamics (MHD)Turbulence: Magneto

Summary -Generally, the fluctuation of magnetic energy decreases with the increase of radial distance. On the other hand the correlation length increases which we can see in undriven models.

-There is a slight increase of magnetic energy density in driven model which is because of the source term.

-The correlation length in the case of pickup ion driven models decreases with increase of radial distance which is different than other two models.

- Most of the systems are in unsteady state first and as the time passes it is getting to steady state which we can see in the result.