Results 41 to 50 of about 571 (177)

Effects of Dynamical and Diabatic Processes on Stationary and Transient Kelvin Waves

Journal of Advances in Modeling Earth Systems, Volume 17, Issue 12, December 2025.
Abstract Atmospheric Kelvin waves (KWs) are influenced by both tropical convective heating and dry dynamical processes, but the relative contributions of these mechanisms remain uncertain. This study examines the effects of various processes on stationary and transient KWs in ERA5 data using a global, multivariate framework that identifies KWs based on
K. M. Holube, F. Lunkeit, S. Vasylkevych, N. Žagar   +3 more
wiley   +1 more source

The Extended Fourier Pseudospectral Time-Domain (PSTD) Method For Fluid Media With Discontinuous Properties

, 2010
The Fourier pseudospectral time-domain (PSTD) method is an attractive method to efficiently model wave propagation through a weakly inhomogeneous fluid medium. The method fails, however, for fluid media with discontinuous properties.
ROGER WAXLER, Hornikx, Maarten, Waxler, R.,, Hornikx, Maarten,, MAARTEN HORNIKX, Waxler, R., Hornikx, M.C.J.   +6 more
core   +1 more source

A sixth-order compact time-splitting Fourier pseudospectral method

CoRR
28 pages, 3 ...
Weiguo Gao, Zhansi He, Jia Yin
openaire   +2 more sources

Spatially Inhomogeneous Phase Change, and Its Effect on Cloud Turbulence

Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract We ask whether cloud turbulence differs from typical fluid turbulence, and answer in the affirmative: small‐scale turbulence is significantly enhanced in clouds by inertial droplets. This enhancement stems from a mismatch in time scales between vortex evacuation and condensation.
Nikitabahen N. Makwana, Bipin Kumar, Yogesh Prasaad M. Sethuraman, Rama Govindarajan   +3 more
wiley   +1 more source

Energy-Preserving Algorithms for the Ginzburg–Landau Equation: Integrating Scientific Research with Talent Cultivation

Mathematics
This study proposes a novel structure-preserving algorithm for the Ginzburg–Landau equation (GLE) by combining the Fourier pseudospectral method with the Exponential Average Vector Field (EAVF) scheme.
Wei Shi, Chuheng Fu
doaj   +1 more source

Large Eddy Simulation of Canonical Atmospheric Boundary Layer Flows With the Spectral Element Method in Nek5000

Journal of Advances in Modeling Earth Systems, Volume 17, Issue 10, October 2025.
Abstract Simulation of turbulence in the atmospheric boundary layer (ABL) is challenging due to the wide range of turbulent scales in the flow. To leverage the currently available computational power for high‐resolution simulation of atmospheric turbulence, fluid solvers that scale well on large compute clusters are required.
L. Huusko, T. Mukha, L. L. Donati, P. P. Sullivan, P. Schlatter, G. Svensson   +5 more
wiley   +1 more source

Structure‐Preserving Approximations of the Serre‐Green‐Naghdi Equations in Standard and Hyperbolic Form

Numerical Methods for Partial Differential Equations, Volume 41, Issue 4, July 2025.
ABSTRACT We develop structure‐preserving numerical methods for the Serre–Green–Naghdi equations, a model for weakly dispersive free‐surface waves. We consider both the classical form, requiring the inversion of a nonlinear elliptic operator, and a hyperbolic approximation of the equations, allowing fully explicit time stepping.
H. Ranocha, M. Ricchiuto
wiley   +1 more source

Simulation Capabilities for Challenging Medical Imaging and Treatment Planning Problems [PDF]

, 2011
Advanced numerical solvers and associated simulation tools, such as, for example, numerical algorithms based on novel spectral methods, efficient time-stepping and domain meshing techniques for solution of Partial Differential Equations (PDEs ...
Beni, Catherine Elizabeth
core   +1 more source

Fourier continuation method for incompressible fluids with boundaries [PDF]

, 2020
We present a Fourier Continuation-based parallel pseudospectral method for incompressible fluids in cuboid non-periodic domains. The method produces dispersionless and dissipationless derivatives with fast spectral convergence inside the domain, and with
Dmitruk, Pablo, Fontana, Mauro, Mininni, Pablo D., Bruno, Oscar Pablo, Mininni, Pablo Daniel, Dmitruk, Pablo Ariel, Bruno, Oscar P.   +6 more
core   +1 more source

Numerical simulations of a stochastic dynamics leading to cascades and loss of regularity: Applications to fluid turbulence and generation of fractional Gaussian fields

Physical Review Research
Motivated by the modeling of the spatial structure of the velocity field of three-dimensional turbulent flows, and the phenomenology of cascade phenomena, a linear dynamics was recently proposed that can generate high velocity gradients from a smooth-in ...
Geoffrey Beck, Charles-Edouard Bréhier, Laurent Chevillard, Ricardo Grande, Wandrille Ruffenach   +4 more
doaj   +1 more source