Zobrazeno 1 - 10
of 416
pro vyhledávání: '"Sreenivasan, Katepalli R"'
The applications and impact of high fidelity simulation of fluid flows are far-reaching. They include settling some long-standing and fundamental questions in turbulence. However, the computational resources required for such efforts are extensive. H
Externí odkaz:
http://arxiv.org/abs/2409.09736
Publikováno v:
J. Fluid Mech. 999 (2024) A28
Turbulent convection in the interiors of the Sun and the Earth occurs at high Rayleigh numbers $Ra$, low Prandtl numbers $Pr$, and different levels of rotation rates. To understand the combined effects better, we study rotating turbulent convection f
Externí odkaz:
http://arxiv.org/abs/2407.15064
Autor:
Chen, Xi, Sreenivasan, Katepalli R.
Turbulent wall-flows are the most important means for understanding the effects of boundary conditions and fluid viscosity on turbulent fluctuations. There has been considerable recent research on mean-square fluctuations. Here, we present expression
Externí odkaz:
http://arxiv.org/abs/2406.18711
A direct dynamical test of the sunspot-cycle is carried out which indicates that a stochastically forced non-linear oscillator characterizes its dynamics. The sunspot series is then decomposed into its eigen time-delay coordinates. The analysis of th
Externí odkaz:
http://arxiv.org/abs/2406.05289
Many claims of computational advantages have been made for quantum computing over classical, but they have not been demonstrated for practical problems. Here, we present algorithms for solving time-dependent PDEs, with particular reference to fluid e
Externí odkaz:
http://arxiv.org/abs/2405.09767
Autor:
Samuel, Roshan J., Bode, Mathis, Scheel, Janet D., Sreenivasan, Katepalli R., Schumacher, Jörg
Publikováno v:
J. Fluid Mech. 996 (2024) A49
We study the dynamics of thermal and momentum boundary regions in three-dimensional direct numerical simulations of Rayleigh-B\'enard convection for the Rayleigh number range $10^5 \le Ra \le 10^{11}$ and $Pr=0.7$. Using a Cartesian slab with horizon
Externí odkaz:
http://arxiv.org/abs/2403.12877
Publikováno v:
2023 Atmosphere 14(7) (2023) 1109
We show theoretically that the mean turbulent dynamics can be described by a kinetic theory representation with a single free relaxation time that depends on space and time. A proper kinetic equation is constructed from averaging the Klimontovich-typ
Externí odkaz:
http://arxiv.org/abs/2401.17229
Autor:
Ingelmann, Julia, Bharadwaj, Sachin S., Pfeffer, Philipp, Sreenivasan, Katepalli R., Schumacher, Jörg
Publikováno v:
Computers & Fluids 281, 106369 (2024)
Two quantum algorithms are presented for the numerical solution of a linear one-dimensional advection-diffusion equation with periodic boundary conditions. Their accuracy and performance with increasing qubit number are compared point-by-point with e
Externí odkaz:
http://arxiv.org/abs/2401.00326
Inertial wave modes in the Sun are of interest owing to their potential to reveal new insight into the solar interior. These predominantly retrograde-propagating modes in the solar subsurface appear to deviate from the thin-shell Rossby-Haurwitz mode
Externí odkaz:
http://arxiv.org/abs/2308.12766
Inertial range scaling exponents for both Lagrangian and Eulerian structure functions are obtained from direct numerical simulations of isotropic turbulence in triply periodic domains at Taylor-scale Reynolds number up to 1300. We reaffirm that trans
Externí odkaz:
http://arxiv.org/abs/2307.04846