Zobrazeno 1 - 10
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pro vyhledávání: '"stratified turbulence"'
Modelling fluid turbulence using a `skeleton' of coherent structures has traditionally progressed by focusing on a few canonical laboratory experiments such as pipe flow and Taylor-Couette flow. We here consider the stratified inclined duct, a sustai
Externí odkaz:
http://arxiv.org/abs/2411.08062
Publikováno v:
J. Fluid Mech. 991 (2024) R1
Recent theoretical progress using multiscale asymptotic analysis has revealed various possible regimes of stratified turbulence. Notably, buoyancy transport can either be dominated by advection or diffusion, depending on the effective P\'eclet number
Externí odkaz:
http://arxiv.org/abs/2404.05896
Autor:
Meena, Muralikrishnan Gopalakrishnan, Liousas, Demetri, Simin, Andrew D., Kashi, Aditya, Brewer, Wesley H., Riley, James J., Kops, Stephen M. de Bruyn
We develop time-series machine learning (ML) methods for closure modeling of the Unsteady Reynolds Averaged Navier Stokes (URANS) equations applied to stably stratified turbulence (SST). SST is strongly affected by fine balances between forces and be
Externí odkaz:
http://arxiv.org/abs/2404.16141
Akademický článek
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Quantifying transport by strongly stratified turbulence in low Prandtl number ($Pr$) fluids is critically important for the development of better models for the structure and evolution of stellar and planetary interiors. Motivated by recent numerical
Externí odkaz:
http://arxiv.org/abs/2311.06424
Autor:
Petropoulos, Nicolaos, Couchman, Miles M. P., Mashayek, Ali, Kops, Stephen M. de Bruyn, Caulfield, Colm-cille P.
Relatively strongly stratified turbulent flows tend to self-organise into a 'layered anisotropic stratified turbulence' (LAST) regime, characterised by relatively deep and well-mixed density 'layers' separated by relatively thin 'interfaces' of enhan
Externí odkaz:
http://arxiv.org/abs/2310.15365
Akademický článek
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The dissipation rates of the basic turbulent second-order moments are the key parameters controlling turbulence energetics and spectra, turbulent fluxes of momentum and heat, and playing a vital role in turbulence modelling. In this paper, we use the
Externí odkaz:
http://arxiv.org/abs/2309.05869
The results of large eddy simulation (LES) using three sub-grid scale models, namely: constant coefficient Smagorinsky, dynamic Smagorinsky, and a dynamic Clark model, for rotating stratified turbulence in the absence of forcing using large-scale iso
Externí odkaz:
http://arxiv.org/abs/2308.07978
Autor:
Lefauve, Adrien, Couchman, Miles M. P.
We propose a dimensionality reduction and unsupervised clustering method for the automatic classification and reduced-order modeling of density-stratified turbulence in laboratory experiments. We apply this method to 113 long shadowgraph movies colle
Externí odkaz:
http://arxiv.org/abs/2305.04048