Results 1 to 10 of about 1,892,101 (246)
Direct numerical simulations of aeolian sand ripples. [PDF]
Proc Natl Acad Sci U S A, 2014 Significance Wind ripples decorate the flanks of dunes in amazingly regular patterns, on both Earth and Mars. Their emergence at a wavelength much larger than the grain size is currently unexplained. We report direct numerical simulations of grains interacting with a wind flow that are, for the first time to our knowledge, able to reproduce ...
Durán O, Claudin P, Andreotti B.
europepmc +9 more sources
Direct Numerical Simulations of Capillary Wave Turbulence [PDF]
Physical Review Letters, 2014 This work presents Direct Numerical Simulations of capillary wave turbulence solving the full 3D Navier Stokes equations of a two-phase flow. When the interface is locally forced at large scales, a statistical stationary state appears after few forcing periods. Smaller wave scales are generated by nonlinear interactions, and the wave height spectrum is
Deike, Luc +3 more
semanticscholar +10 more sources
Rethinking materials simulations: Blending direct numerical simulations with neural operators [PDF]
npj Computational Materials, 2023 Materials simulations based on direct numerical solvers are accurate but computationally expensive for predicting materials evolution across length- and time-scales, due to the complexity of the underlying evolution equations, the nature of multiscale ...
Vivek Oommen +4 more
doaj +2 more sources
Direct numerical simulations of three-dimensional surface instability patterns in thin film-compliant substrate structures [PDF]
Scientific Reports, 2021 A comprehensive numerical study of three-dimensional surface instability patterns is presented. The formation of wrinkles is a consequence of deformation instability when a thin film, bonded to a compliant substrate, is subject to in-plane compressive ...
Siavash Nikravesh +2 more
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Optimal Taylor–Couette flow: direct numerical simulations [PDF]
Journal of Fluid Mechanics, 2013 AbstractWe numerically simulate turbulent Taylor–Couette flow for independently rotating inner and outer cylinders, focusing on the analogy with turbulent Rayleigh–Bénard flow. Reynolds numbers of $R{e}_{i} = 8\times 1{0}^{3} $ and $R{e}_{o} = \pm 4\times 1{0}^{3} $ of the inner and outer cylinders, respectively, are reached, corresponding to Taylor ...
Ostilla, R +4 more
openaire +8 more sources
High performance Python for direct numerical simulations of turbulent flows [PDF]
Computer Physics Communications, 2016 Direct Numerical Simulations (DNS) of the Navier Stokes equations is an invaluable research tool in fluid dynamics. Still, there are few publicly available research codes and, due to the heavy number crunching implied, available codes are usually written
M. Mortensen, H. Langtangen
semanticscholar +3 more sources
DIPOLE COLLAPSE AND DYNAMO WAVES IN GLOBAL DIRECT NUMERICAL SIMULATIONS [PDF]
, 2012 Magnetic fields of low-mass stars and planets are thought to originate from self-excited dynamo action in their convective interiors. Observations reveal a variety of field topologies ranging from large-scale, axial dipoles to more structured magnetic ...
M. Schrinner, L. Petitdemange, E. Dormy
semanticscholar +3 more sources
Gas-Solid Heat Transfer Computation from Particle-Resolved Direct Numerical Simulations
Fluids, 2021 Particle-Resolved simulations (PR-DNS) have been conducted using a second order implicit Viscous Penalty Method (VPM) to study the heat transfer between a set of particles and an incompressible carrier fluid.
Mohamed-Amine Chadil +2 more
doaj +1 more source
Ephemeral antibubbles: Spatiotemporal evolution from direct numerical simulations
Physical Review Research, 2022 Antibubbles, which consist of a shell of a low-density fluid inside a high-density fluid, have several promising applications. We show, via extensive direct numerical simulations (DNSs), in both two and three dimensions, that the spatiotemporal evolution
Nairita Pal +3 more
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Bedform dynamics from coupled bed-flow direct numerical simulations [PDF]
MATEC Web of Conferences, 2019 We present results of time-evolving coupled direct numerical simulations between an erodible bed and an overlying pressure-driven, turbulent flow field. A total of 6 simulations are considered, the details of which are shown in Table 1.
Zgheib N. +4 more
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