56 citations · 155 across the 12 of their papers we have counts for
12 papers
Relative accuracy of turbulence simulations using pseudo-spectral and finite difference solvers
Akash Rodhiya, Shashwat Bhattacharya, Mahendra K Verma
For a single timestep, a spectral solver is known to be more accurate than its finite-difference counterpart. However, as we show in this paper, turbulence simulations using the tw…
Scale-resolved turbulent Prandtl number for Rayleigh-Bénard convection at
Shashwat Bhattacharya, Dmitry Krasnov, Ambrish Pandey +2
We present a framework to calculate the scale-resolved turbulent Prandtl number for the well-mixed and highly inertial bulk of a turbulent Rayleigh-Bénard mesoscale convecti…
Wall-attached convection under strong inclined magnetic fields
Shashwat Bhattacharya, Thomas Boeck, Dmitry Krasnov +1
We employ a linear stability analysis and direct numerical simulations to study the characteristics of wall-modes in thermal convection in a rectangular box under strong and inclin…
Simulation of magnetohydrodynamic flows of liquid metals with heat transfer or magnetic stirring
Shashwat Bhattacharya, Seyed Loghman Sanjari, Dmitry Krasnov +1
We discuss the effects of nonhomogeneous magnetic fields in liquid metal flows in two different configurations. In the first configuration, we briefly report the impact of fringing…
Effects of strong fringing magnetic fields on turbulent thermal convection
Shashwat Bhattacharya, Thomas Boeck, Dmitry Krasnov +1
We study the influence of fringing magnetic fields on turbulent thermal convection in a horizontally extended rectangular domain. The magnetic field is created in the gap between t…
Predictions of Reynolds and Nusselt numbers in turbulent convection using machine-learning models
Shashwat Bhattacharya, Mahendra K Verma, Arnab Bhattacharya
In this paper, we develop a multivariate regression model and a neural network model to predict the Reynolds number (Re) and Nusselt number in turbulent thermal convection. We comp…
Prandtl number dependence of the small-scale properties in turbulent Rayleigh-Bénard convection
Shashwat Bhattacharya, Mahendra K. Verma, Ravi Samtaney
We analyze the Prandtl number (Pr) dependence of spectra and fluxes of kinetic energy, as well as the energy injection rates and dissipation rates, of turbulent thermal convection…
Revisiting Reynolds and Nusselt numbers in turbulent thermal convection
Shashwat Bhattacharya, Mahendra K. Verma, Ravi Samtaney
In this paper, we extend Grossmann and Lohse's (GL) model [Phys. Rev. Lett. {\bf 86}, 3316 (2001)] for the predictions of Reynolds number (Re) and Nusselt number (Nu) in turbulent…
Euler Turbulence and thermodynamic equilibrium
Mahendra K. Verma, Shashwat Bhattacharya, Soumyadeep Chatterjee
We perform a unique direct numerical simulation of Euler turbulence using delta-correlated velocity field as an initial condition, and report a full range of and energy s…
Scaling and spatial intermittency of thermal dissipation in turbulent convection
Shashwat Bhattacharya, Ravi Samtaney, Mahendra K. Verma
We derive scaling relations for the thermal dissipation rate in the bulk and in the boundary layers for moderate and large Prandtl number (Pr) convection. Using direct numerical si…
Similarities between the structure functions of thermal convection and hydrodynamic turbulence
Shashwat Bhattacharya, Shubhadeep Sadhukhan, Anirban Guha +1
In this paper, we analyze the scaling of velocity structure functions of turbulent thermal convection. Using high-resolution numerical simulations, we show that the structure funct…
Complexity of viscous dissipation in turbulent thermal convection
Shashwat Bhattacharya, Ambrish Pandey, Abhishek Kumar +1
Using direct numerical simulations of turbulent thermal convection for Rayleigh number () between and and unit Prandtl number, we derive scaling relation…