IIA Institutional Repository

Browsing IIAP Publications by Subject "Convection"

Browsing IIAP Publications by Subject "Convection"

Sort by: Order: Results:

  • Convection and the Phenomenon of Kilogauss Magnetic Fields on the Sun 
    Venkatakrishnan, P (Indian Institute of Astrophysics, Bangalore, 1984)
    The role played by convection in the formation of slender magnetic flux tubes and in the dynamics of the gas within the tube is discussed in the case of simplified models. Convection instability cannot drive systematic ...
  • Convective collapse and overstable oscillations in solar flux tubes 
    Hasan, S. S (European Space Egency, 1984-11)
    The collapse of solar flux tubes by a convective instability is investigated. At the initial epoch it is assumed that the flux tube is in hydrostatic equilibrium and that it has the same temperature as the ambient medium. ...
  • Dynamics of Magnetic Flux Elements in the Solar Photosphere 
    van Ballegooijen, A. A; Nisenson, P; Noyes, R. W; Löfdahl, M. G; Stein, R. F; Nordlund, Å; Krishnakumar, V (The American Astronomical Society, 1998-12)
    The interaction of magnetic fields and convection is investigated in the context of the coronal heating problem. We study the motions of photospheric magnetic elements using a time series of high-resolution G-band and ...
  • Line Asymmetry and Magnetic Fields 
    Livingston, William (Indian Institute of Astrophysics, Bangalore, 1984)
    The measurement of the asymmetries of Fraunhofer lines shows promise as a diagnostic of convection at the surface layers of the Sun and Stars. We discuss today the observational evidence that the asymmetry, and by inference ...
  • Model for the relationship of granulation and supergranulation 
    Krishan, V (The University of Arizona Press, 1991)
    In this report a mechanism is proposed for producing the observed solar supergranulation from the photospheric granulation by a dissipative decay of two-dimensional turbulence, which leads to concentration of the energy ...
  • Nonlinear development of convective instability within slender flux tubes. II - The effect of radiative heat transport 
    Venkatakrishnan, P (Indian Academy of Sciences, 1985-03)
    Inclusion of radiative heat transport in the energy equation for a slender flux tube leads to oscillations of the tube. The amplitude of the oscillations depends on the radius of the tube when lateral heat exchange alone ...
  • Stability of cool flux tubes in the solar chromosphere Linear analysis 
    Hasan, S. S; Kneer, F (EDP Sciences, 1986-04)
    The linear stability of cool flux tubes in the solar chromosphere which are initially in radiative equilibrium is examined. Owing to the presence of carbon monoxide, there exists a narrow region near the temperature minimum ...
  • A theoretical model of the near-surface shear layer of the Sun 
    Jha, Bibhuti K; Choudhuri, A. R (Oxford University Press on behalf of the Royal Astronomical Society, 2021-09)
    The Sun has a near-surface shear layer (NSSL), within which the angular velocity decreases rapidly with radius. We provide an explanation of this layer based on the thermal wind balance equation. Since convective motions ...
  • Two-dimensional segmentation of small convective patterns in radiation hydrodynamics simulations 
    Lemmerer, B; Utz, D; Hanslmeier, A; Veronig, A; Thonhofer, S; Grimm-Strele, H; Kariyappa, R (EDP Sciences, 2014-03)
    Context. Recent results from high-resolution solar granulation observations indicate the existence of a population of small granular cells that are smaller than 600 km in diameter. These small convective cells strongly ...

Search DSpace


Browse

My Account