6 papers · 1 filter
Thermal convection in one, two, three and four dimensions
Ambrish Pandey, Harshit Tiwari, Katepalli R. Sreenivasan
We study by means of direct numerical simulations the influence of the dimensionality of convection on flow properties. We call attention to a few general principles from consideri…
Scaling in Supersonic Turbulence: Energy Spectra and Fluxes using High-Fidelity Direct Numerical Simulations
Harshit Tiwari, Dhananjay Singh, Mahendra K. Verma +1
Supersonic turbulence is vital to astrophysical and high-speed engineering flows, yet its energy transfer mechanisms remain poorly understood. We present high-resolution ()…
Mathematical formulation of mode-to-mode energy transfers and energy fluxes in compressible turbulence
Dhananjay Singh, Harshit Tiwari, Lekha Sharma +1
Understanding compressible turbulence is critical for modeling atmospheric, astrophysical, and engineering flows. However, compressible turbulence poses a more significant challeng…
Classical 1/3 Nusselt number scaling in highly turbulent compressible convection
Harshit Tiwari, Mahendra K. Verma
Planetary and stellar convection, which are compressible and turbulent, remain poorly understood. In this paper, we report numerical results on the scaling of Nusselt number ($\mat…
Compressible turbulent convection at very high Rayleigh numbers
Harshit Tiwari, Lekha Sharma, Mahendra K. Verma
Heat transport in highly turbulent convection is not well understood. In this paper, we simulate compressible convection in a box of aspect ratio 4 using computationally-efficient…
High Accuracy Determination of Rheological Properties of Drilling Fluids Using the Marsh Funnel
Sanket Biswas, Harshita Tiwari, Sujata Verma +1
Efficient and safe drilling operations require precise determination of rheological properties in drilling fluids, encompassing dynamic viscosity for Newtonian fluids, and apparent…