190 citations · 1.1k across the 74 of their papers we have counts for
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Dynamics of phase space vortices in Vlasov plasmas with ion scale inhomogeneity : II Chirped frequency drive study
Sanjeev Kumar Pandey, Amudon Chingangbam, Rajaraman Ganesh
In Part I of the companion paper [Ref Part I], we have extensively discussed about the creation of quasi-stationary ion scale (QSIS) inhomogeneity using a constant frequency extern…
Dynamics of phase space vortices in Vlasov plasmas with ion scale inhomogeneity : I Constant frequency drive study
Sanjeev Kumar Pandey, Amudon Chingangbam, Rajaraman Ganesh
Formation dynamics and stability starting from various phase space vortex (PSV) or Bernstein-Greene-Kruskal (BGK) structures i.e electron acoustic wave (EAW), Langmuir (LAN) waves…
Interaction of driven "cold" electron plasma wave with thermal bulk mediated by spatial ion inhomogeneity
Sanjeev Kumar Pandey, Rajaraman Ganesh
Using high resolution Vlasov - Poisson simulations, evolution of driven ``cold" electron plasma wave (EPW) in the presence of stationary inhomogeneous background of ions is studied…
The Role of Helical and Non-Helical Drives on the evolution of Self-Consistent Dynamos
Shishir Biswas, Rajaraman Ganesh
In the self-consistent dynamo limit, the magnetic feedback on the velocity field is sufficiently strong to induce a change in the topology of the magnetic field. Consequently, the…
The high-density regime of dusty plasma: Coulomb plasma
K. Avinash, S. J. Kalita, R. Ganesh +1
It is shown that the dust density regimes in dusty plasma are characterized by two complementary screening processes, (a) the low dust density regime where the Debye screening is t…
Effect of flow shear on the onset of dynamos
Shishir Biswas, Rajaraman Ganesh
Understanding the origin and structure of mean magnetic fields in astrophysical conditions is a major challenge. Shear flows often coexist in such astrophysical conditions and the…
Revisiting Kinematic Fast Dynamo in 3-dimensional magnetohydrodynamic plasmas: Dynamo transition from non-Helical to Helical flows
Shishir Biswas, Rajaraman Ganesh
Dynamos wherein magnetic field is produced from velocity fluctuations are fundamental to our understanding of several astrophysical and/or laboratory phenomena. Though fluid helici…
Ion-driven destabilization of a toroidal electron plasma -- A 3D3VPIC Simulation
Swapnali Khamaru, Rajaraman Ganesh, Meghraj Sengupta
Ion resonance instability of toroidal electron plasmas in a tight aspect ratio axisymmetric toroidal device is reported for ions of different initial density values using…
Scaling of reconnection parameters in magnetic island coalescence: Role of in-plane shear flow
Jagannath Mahapatra, Rajaraman Ganesh, Abhijit Sen
A 2D incompressible viscoresistive-MHD model [Mahapatra et. al., Phys. Plasmas 28, 072103 (2021)] is used to study the scaling of reconnection parameters in magnetic island coalesc…
Coupling of "cold" electron plasma wave via stationary ion inhomogeneity to the plasma bulk
Sanjeev Kumar Pandey, Jagannath Mahapatra, Rajaraman Ganesh
Using high resolution kinetic (VPPM-OMP 1.0) and fluid (BOUT++) solvers, evolution of long-wavelength electron plasma wave (EPW) in the presence of stationary periodic ion backgrou…
Effect of In-Plane Shear Flow on the Magnetic Island Coalescence Instability
Jagannath Mahapatra, Arkaprava Bokshi, Rajaraman Ganesh +1
Using a 2D Viscoresistive Reduced MagnetoHydroDynamic (VR-RMHD) model, the magnetic island coalescence problem is studied in the presence of in-plane, parallel shear flows. Extendi…
Study of Dynamo Action in Three Dimensional Magnetohydrodynamic Plasma with Arnold-Beltrami-Childress Flow
Rupak Mukherjee, Rajaraman Ganesh
For a three dimensional magnetohydrodynamic (MHD) plasma the dynamo action with ABC flow as initial condition has been studied. The study delineates crucial parameter that gives a…
Emergence of inertial waves from coherent vortex source in Yukawa medium
Akanksha Gupta, Rajaraman Ganesh
The evolution of isotropic, nondispersive, inertial wave, emerging from an unsteady initial coherent vortex is studied for strongly correlated Yukawa medium using 2D molecular dyna…
Viscoelastic effects on asymmetric two-dimensional vortex patterns in a strongly coupled dusty plasma
Akanksha Gupta, Rupak Mukherjee, Rajaraman Ganesh
Strongly coupled dusty plasma medium is often described as a viscoelastic fluid that retains its memory. In a flowing dusty plasma medium, vortices of different sizes appear when t…
Numerical relaxation of a 3D MHD Taylor - Woltjer state subject to abrupt expansion
Rupak Mukherjee, Rajaraman Ganesh
Since the advent of Taylor-Woltjer theory [J B Taylor, PRL, 33, 1139 (1974), L Woltjer, PNAS, 44, 489 (1958)], it has been widely believed that situations with perfectly conducting…
Recurrence in three dimensional magnetohydrodynamic plasma
Rupak Mukherjee, Rajaraman Ganesh, Abhijit Sen
We report on a numerical observation of recurrence phenomenon in a three dimensional magneto-hydrodynamic (MHD) plasma for certain classes of initial flow profiles. Our simulations…
Coherent nonlinear oscillations in magnetohydrodynamic plasma
Rupak Mukherjee, Rajaraman Ganesh, Abhijit Sen
Single fluid magnetohydrodynamic (MHD) equations have been studied through direct numerical simulations (DNS) using pseudo-spectral methods in two as well as three spatial dimensio…
Experimental observation of drift wave turbulence in an inhomogeneous six-pole cusp magnetic field of MPD
A. D. Patel, M. Sharma, R. Ganesh +2
This paper presents a detailed study on the controlled experimental observation of drift wave instabilities in an inhomogeneous Six pole cusp magnetic field generated by an in-hous…
A new multi line-cusp magnetic field plasma device (MPD) with variable magnetic field for fundamental plasma studies
A. D. Patel, M. Sharma, N. Ramasubramanian +2
One of the fundamental problems is the understanding of physics of electrostatic and electromagnetic fluctuations in multi-scale plasma turbulence. Especially so, in continuously c…
Isothermal Equation of State of Three Dimensional Yukawa Gas
Manish K. Shukla, K. Avinash, Rupak Mukherjee +1
Molecular Dynamics (MD) simulation is carried out to examine the effect of particle confinement on the pressure of 3D Yukawa gas. Confinement effects are taken into account by usin…
Influence of electron-neutral elastic collisions on the instability of an ion-contaminated cylindrical electron cloud: 2D3V PIC-with-MCC simulations
Meghraj Sengupta, Rajaraman Ganesh
This paper is a simulation based investigation of the effect of elastic collisions and effectively elastic-like excitation collisions between electrons and background neutrals on t…