Deep Learning Emulation of Subgrid‐Scale Processes in Turbulent Shear Flows
Sign Up to like & getrecommendations! Published in 2020 at "Geophysical Research Letters"
DOI: 10.1029/2020gl087005
Abstract: Deep neural networks (DNNs) are developed from a data set obtained from the dynamic Smagorinsky model to emulate the subgrid‐scale (SGS) viscosity (νsgs) and diffusivity (κsgs) for turbulent stratified shear flows encountered in the oceans… read more here.
Keywords: scale processes; subgrid scale; shear flows; sgs ... See more keywords
Spatial Covariance Modeling for Stochastic Subgrid‐Scale Parameterizations Using Dynamic Mode Decomposition
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Advances in Modeling Earth Systems"
DOI: 10.1029/2020ms002115
Abstract: Stochastic parameterizations are increasingly being used in climate modeling to represent subgrid‐scale processes. While different parameterizations are being developed considering different aspects of the physical phenomena, less attention is given to technical and numerical aspects.… read more here.
Keywords: subgrid scale; dynamic mode; covariance; mode decomposition ... See more keywords
Large-eddy simulation of Sandia Flame F using structural subgrid-scale models and partially-stirred-reactor approach
Sign Up to like & getrecommendations! Published in 2019 at "Physics of Fluids"
DOI: 10.1063/1.5087078
Abstract: Owing to the strong interaction between turbulence and combustion, it is particularly challenging to accurately predict local flame extinctions in a turbulent flame at high Reynolds numbers. Subgrid-scale (SGS) parameterization and model for calculating the… read more here.
Keywords: large eddy; flame; eddy simulation; partially stirred ... See more keywords
A posteriori tests of subgrid-scale models in an isothermal turbulent channel flow
Sign Up to like & getrecommendations! Published in 2019 at "Physics of Fluids"
DOI: 10.1063/1.5091829
Abstract: This paper studies the large-eddy simulation (LES) of isothermal turbulent channel flows. We investigate zero-equation algebraic models without wall function or wall model: functional models, structural models and mixed models. In addition to models from… read more here.
Keywords: turbulent channel; posteriori tests; scale models; subgrid scale ... See more keywords
Subgrid scale modeling considerations for large eddy simulation of supercritical turbulent mixing and combustion
Sign Up to like & getrecommendations! Published in 2021 at "Physics of Fluids"
DOI: 10.1063/5.0055751
Abstract: This paper presents a systematic investigation of large eddy simulation (LES) and subgrid scale (SGS) modeling with application to transcritical and supercritical turbulent mixing and combustion. There remains uncertainty about the validity of extending the… read more here.
Keywords: large eddy; supercritical turbulent; turbulent mixing; subgrid scale ... See more keywords
Subgrid-scale Capillary Breakup Model for Liquid Jet Atomization
Sign Up to like & getrecommendations! Published in 2020 at "Combustion Science and Technology"
DOI: 10.1080/00102202.2020.1732950
Abstract: ABSTRACT A subgrid-scale capillary breakup model has been developed by coupling a Eulerian interface-capturing approach to a Lagrangian point particle method. At the fully resolved scale, the evolution of phase interface is captured by the… read more here.
Keywords: scale capillary; breakup; model; subgrid scale ... See more keywords
Removal of the highest energy POD mode for optimal construction of subgrid-scale parameters in a SPIV-measured turbulent mixing layer flow
Sign Up to like & getrecommendations! Published in 2022 at "Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science"
DOI: 10.1177/09544062211047847
Abstract: Large eddy simulation is based on decomposition of turbulent flow structures to large energy-containing scales and small subgrid-scale (SGS) structures. The present study analyzes the effect of removing high-energy modes of flow to find the… read more here.
Keywords: pod; energy; optimal construction; flow ... See more keywords
Implicit Subgrid-Scale Modeling of a Mach 2.5 Spatially Developing Turbulent Boundary Layer
Sign Up to like & getrecommendations! Published in 2022 at "Entropy"
DOI: 10.3390/e24040555
Abstract: We employ numerically implicit subgrid-scale modeling provided by the well-known streamlined upwind/Petrov–Galerkin stabilization for the finite element discretization of advection–diffusion problems in a Large Eddy Simulation (LES) approach. Whereas its original purpose was to provide… read more here.
Keywords: mach; implicit subgrid; scale modeling; turbulent boundary ... See more keywords
Subgrid-scale variability in clear-sky relative humidity and forcing by aerosol–radiation interactions in an atmosphere model
Sign Up to like & getrecommendations! Published in 2017 at "Atmospheric Chemistry and Physics"
DOI: 10.5194/acp-18-8589-2018
Abstract: Abstract. Atmosphere models with resolutions of several tens of kilometres take subgrid-scale variability in the total specific humidity qt into account by using a uniform probability density function (PDF) to predict fractional cloud cover. However,… read more here.
Keywords: scale variability; clear sky; subgrid scale; relative humidity ... See more keywords
Sensitivities of subgrid-scale physics schemes, meteorological forcing, and topographic radiation in atmosphere-through-bedrock integrated process models: a case study in the Upper Colorado River basin
Sign Up to like & getrecommendations! Published in 2023 at "Hydrology and Earth System Sciences"
DOI: 10.5194/hess-27-1771-2023
Abstract: Abstract. Mountain hydrology is controlled by interacting processes extending from the atmosphere through the bedrock. Integrated process models (IPMs), one of the main tools needed to interpret observations and refine conceptual models of the mountainous… read more here.
Keywords: atmosphere bedrock; scale physics; physics; hydrology ... See more keywords