12 citations · 20 across the 4 of their papers we have counts for
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A hybrid discrete exterior calculus and finite difference method for Boussinesq convection in spherical shells
Bhargav Mantravadi, Pankaj Jagad, Ravi Samtaney
We present a new hybrid discrete exterior calculus (DEC) and finite difference (FD) method to simulate fully three-dimensional Boussinesq convection in spherical shells subject to…
Effects of Rotation on Vorticity Dynamics on a Sphere with Discrete Exterior Calculus
Pankaj Jagad, Ravi Samtaney
We investigate incompressible, inviscid vorticity dynamics on a rotating unit sphere using a Discrete Exterior Calculus (DEC) scheme. For a prescribed initial vorticity distributio…
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…
A Primitive Variable Discrete Exterior Calculus Discretization of Incompressible Navier-Stokes Equations over Surface Simplicial Meshes
Pankaj Jagad, Abdullah Abukhwejah, Mamdouh Mohamed +1
A conservative primitive variable discrete exterior calculus (DEC) discretization of the Navier-Stokes equations is performed. An existing DEC method (Mohamed, M. S., Hirani, A. N.…
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…
Enstrophy transfers in helical turbulence
Shubhadeep Sadhukhan, Roshan Samuel, Franck Plunian +3
In this paper we study the enstrophy transers in helical turbulence using direct numerical simulation. We observe that the helicity injection does not have significant effects on t…