Dynamical processes occurring in geophysical flows are characterised by the nonlinear interaction of various scales of motion. The accurate numerical representation of such flows is limited by the available number of mesh points covering the domain of interest. Numerical simulations applying uniformly distributed grid cells waste mesh points in regions of large motion scales whereas coexisting ...

Abstract. Offline advection schemes allow for low-computational-cost simulations using existing model output. This study presents the approach and assessment passive offline tracer within Regional Ocean Modeling System (ROMS). An advantage of running code ROMS itself is consistency in numerics on- offline. We find that robust: after about 14 d simulation (almost 60 units time normalized by time...

The advantages of the second-generation AMD EPYC Rome processors can be successfully used in race to Exascale. However, novel architecture's complexity makes it challenging adapt demanding scientific codes - like stencil ones platforms with CPUs. This article tackles this challenge by exploring adaptation stencil-based CFD (computational fluid dynamics) application called MPDATA these processor...

The advance of massively parallel computing in the nineteen nineties and beyond encouraged finer grid intervals in numerical weather-prediction models. This has improved resolution of weather systems and enhanced the accuracy of forecasts, while setting the trend for development of unified all-scale atmospheric models. This paper first outlines the historical background to a wide range of numer...

A numerical study of stably stratified flows past spheres at Reynolds numbers Re=200 and Re=300 is reported. In these flow regimes, a neutrally laminar induces distinctly different near-wake features. However, the behaviour changes significantly as stratification increases suppresses scale vertical displacements fluid parcels. Computations for range Froude Fr∈[0.1,∞] show that number decreases,...

Solving Navier-Stokes equations using monotone algorithms often produces results that are consistent with the dynamics of high Reynolds number turbulence despite formally insufficient numerical resolution to capture all physically relevant scales of motion. It is frequently argued that the truncation error of a numerical scheme provides a mechanism for the energy dissipation and serves as an im...

A parallel, unstructured grid, finite-volume parametric wind-wave model is developed with the intention of coupling to three-dimensional unstructured grid ocean circulation models. The model is derived from a conservation of energy flux formulations. In the model, the shoaling, refraction, and wave dissipation, as well as exchange of current and Stokes drift momentum effects are considered. The...