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pro vyhledávání: '"Singh, Nishant K"'
Presence of a hot corona above the accretion disc can have important consequences for the evolution of magnetic fields and the Shakura-Sunyaev (SS) viscosity parameter $\alpha$ in such a strongly coupled system. In this work, we have performed three-
Externí odkaz:
http://arxiv.org/abs/2410.14497
Previous studies have found that localized strengthening of the f mode recedes the emergence of active regions on the Sun by one day to three days. To help interpret these observations, we have performed nonlinear simulations of convection with impos
Externí odkaz:
http://arxiv.org/abs/2409.14840
The small-scale dynamo is typically studied by assuming that the correlation time of the velocity field is zero. Some authors have used a smooth renovating flow model to study how the properties of the dynamo are affected by the correlation time bein
Externí odkaz:
http://arxiv.org/abs/2402.08366
Magnetic fields grow quickly, even at early cosmological times, suggesting the action of a small-scale dynamo (SSD) in the interstellar medium (ISM) of galaxies. Many studies have focused on idealized, isotropic, homogeneous, turbulent driving of the
Externí odkaz:
http://arxiv.org/abs/2210.04460
We present here a simple hydrodynamic model based on a sequence of steady states of the inner sub-Keplerian accretion disc to model its spectral states. Correlations between different hydrodynamic steady states are studied with a goal to understand t
Externí odkaz:
http://arxiv.org/abs/2210.04997
Autor:
Käpylä, Petri J., Singh, Nishant K.
Turbulent motions enhance the diffusion of large-scale flows and temperature gradients. Such diffusion is often parameterized by coefficients of turbulent viscosity ($\nu_{\rm t}$) and turbulent thermal diffusivity ($\chi_{\rm t}$) that are analogous
Externí odkaz:
http://arxiv.org/abs/2207.10335
We extend the notion of a shell model to stratified systems, and propose one that represents stratified, nonmagnetic, nonrotating convection at low Mach number. Motivated by profiles of background stratification that support convection in stars such
Externí odkaz:
http://arxiv.org/abs/2206.04912
Autor:
Tano-Menka, Rhoda, Singh, Nishant K., Muzhingi, Itai, Li, Xiaolong, Mandanas, Michael V., Kaseke, Clarety, Crain, Charles R., Zhang, Angela, Ogunshola, Funsho J., Vecchiarello, Liza, Piechocka-Trocha, Alicja, Bashirova, Arman, Birnbaum, Michael E., Carrington, Mary, Walker, Bruce D., Gaiha, Gaurav D.
Publikováno v:
In Structure 8 August 2024 32(8):1121-1136
Autor:
Jingade, Naveen, Singh, Nishant K.
Here we explore the role of temporal fluctuations in kinetic helicity on the generation of large-scale magnetic fields in presence of a background linear shear flow. Key techniques involved here are same as in our earlier work \citep[][hereafter pape
Externí odkaz:
http://arxiv.org/abs/2103.12599
Autor:
Singh, Nitesh Kumar1 (AUTHOR) ernksingh24@gmail.com, Singh, Nishant K.1 (AUTHOR) nksingh.bme@gmail.com, Verma, Rati2 (AUTHOR) rati.verma14@gmail.com, Diwan, Ashish D.3 (AUTHOR) a.diwan@unsw.edu.au
Publikováno v:
Bioengineering (Basel). Apr2024, Vol. 11 Issue 4, p344. 19p.