51 citations · 135 across the 5 of their papers we have counts for
5 papers
Local and Nonlocal Advected Invariants and Helicities in Magnetohydrodynamics and Gas Dynamics I: Lie Dragging Approach
Gary M. Webb, Brahmananda Dasgupta, James F McKenzie +2
In this paper we discuss conservation laws in ideal magnetohydrodynamics (MHD) and gas dynamics associated with advected invariants. The invariants in some cases, can be related to…
Particle energization through time-periodic helical magnetic fields
Dhrubaditya Mitra, Axel Brandenburg, Brahmananda Dasgupta +2
We solve for the motion of charged particles in a helical time-periodic ABC (Arnold-Beltrami-Childress) magnetic field. The magnetic field lines of a stationary ABC field with coef…
Dispersive magnetized waves in the solar wind plasma
Dastgeer Shaikh, B. Dasgupta, P. K. Shukla
We derive a generalized linear dispersion relation of waves in a strongly magnetized, compressible, homogeneous and isotropic quasineutral plasma. Starting from a two fluid model,…
A Practical Approach to Coronal Magnetic Field Extrapolation Based on the Principle of Minimum Dissipation Rate
Q. Hu, B. Dasgupta, D. P. Choudhary +1
We present a newly developed approach to solar coronal magnetic field extrapolation from vector magnetograms, based on the Principle of Minimum Dissipation Rate (MDR). The MDR syst…
Relaxed States of a Magnetized Plasma with Minimum Dissipation
B. Dasgupta, P. Dasgupta, M. S. Janaki +2
Relaxed States of a slightly resistive and turbulent magnetized plasma is obtained by invoking the principle of minimum dissipation which leads to curl curl curl B = λB . A solutio…