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  • Coronal turbulence and the angular broadening of radio sources – the role of the structure function 
    INGALE, MADHUSUDAN; SUBRAMANIAN, PRASAD; Cairns, Iver (Oxford University Press, 2015-03)
    The amplitude of density turbulence in the extended solar corona, especially near the dissipation scale, impinges on several problems of current interest. Radio sources observed through the turbulent solar wind are broadened ...
  • Turbulent density fluctuations in the solar wind 
    INGALE, MADHUSUDAN (Dept. of Physics, 2016-04)
    Measurements of density, electric field, magnetic field, in the solar wind have revealed fluctuations in these quantities spanning a large range of scales, indicative of turbulence. The nature of turbulence in the solar ...
  • Amplitude of solar wind density turbulence from 10 to 45 R⊙ 
    Raja, K. Sasikumar; INGALE, MADHUSUDAN; Ramesh, V; SUBRAMANIAN, PRASAD; Manoharan, P. K.; Janardhan, P. (American Geophysical Union, 2016-12)
    We report on the amplitude of the density turbulence spectrum ( urn:x-wiley:jgra:media:jgra53108:jgra53108-math-0001) and the density modulation index (δN/N) in the solar wind between 10 and 45R⊙. We derive these quantities ...
  • Dissipation Scale Lengths of Solar Wind Turbulence 
    Raja, K. Sasikumar; SUBRAMANIAN, PRASAD; INGALE, MADHUSUDAN; Ramesh, R. (IOP Publishing, 2019-02)
    Knowing the lengthscales at which turbulent fluctuations dissipate is key to understanding the nature of weakly compressible magnetohydrodynamic turbulence. We use radio wavelength interferometric imaging observations that ...
  • Understanding droplet collisions through a model flow: Insights from a Burgers vortex 
    AGASTHYA, LOKAHITH; Picardo, Jason R.; Ravichandran, S.; Govindarajan, Rama; Ray, Samriddhi Sankar (American Physical Society, 2019-06)
    We investigate the role of intense vortical structures, similar to those in a turbulent flow, in enhancing collisions (and coalescences) which lead to the formation of large aggregates in particle-laden flows. By using a ...
  • Thermal Conduction and Electron Heating in Solar Coronal Mass Ejections 
    SAIKAT, MAJUMDER (2023-05)
    Massive eruptions of plasma and magnetic fields from the solar corona, called Coronal Mass Ejections (CMEs), are significant drivers of space weather phenomena and can cause extreme geomagnetic storms if Earth-directed. ...
  • Experimental Probing of the Turbulent Non-Turbulent Interface in Wall Jets 
    SOOD, PRANAV (2023-05)
    Turbulent flows past a solid surface exhibit region close to the surface where the presence of the surface is felt. In external flows such as boundary layers, the turbulence is confined to a region close to the surface and ...
  • Characterizing Turbulent Magnetic Field, Density and Velocity Fluctuations in Earth-Directed ICMEs 
    GHUGE, DEEP (2024-05)
    Earth-directed solar Coronal Mass Ejections (CMEs) often interact with the magnetosphere, causing geomagnetic storms that disrupt a range of technologies we routinely rely on. A good understanding of the CME-magnetosphere ...
  • Turbulent Power: A Discriminator Between Sheaths and CMEs 
    GHUGE, DEEP; Bhattacharjee, Debesh; SUBRAMANIAN, PRASAD (Springer Nature, 2025-04)
    Solar coronal mass ejections (CMEs) directed at the Earth often drive large geomagnetic storms. Here, we use velocity, magnetic field, and proton density data from 152 CMEs that were sampled in situ at 1 AU by the Wind ...
  • Proton heating estimates from near-Earth observations of coronal mass ejections in solar cycle 24 
    Bhattacharjee, Debesh; SUBRAMANIAN, PRASAD; Majumder, Saikat; Mishra, Wageesh (Oxford University Press, 2025-07)
    As solar coronal mass ejections (CMEs) propagate through the heliosphere, they expend energy in heating protons to compensate for the cooling that occurs due to expansion. CME propagation models usually treat energy ...