Results 131 to 140 of about 375 (167)

Investigation of the Reduction in Distributed Acoustic Sensing Signal Due to Perforation Erosion by Using CFD Acoustic Simulation and Lighthill's Acoustic Power Law. [PDF]

Sensors (Basel)
Hamanaka Y, Zhu D, Hill AD.
europepmc   +1 more source

Fukushima Contaminated Water Risk Factor: Global Implications. [PDF]

Environ Sci Technol
Liu Y, Li YL, Min YT, Chen S, Yang W, Gu JT, Feng WJ, Li Y, Hong C, Du J, Li S, Li B, Guo Y, Zhang JM, Hu ZZ.   +14 more
europepmc   +1 more source

Local dynamic gradient Smagorinsky model for large-eddy simulation

Physical Review Fluids, 2022
This paper proposes a local dynamic model for large-eddy simulation (LES) without averaging in homogeneous directions. It is demonstrated that the widely-used dynamic Smagorinsky model (DSM) has a singular dynamic model constant if it is used without averaging. The singularity can cause exceedingly large local values of the dynamic model constant.
Hyunji Jane Bae, Roel Verstappen
exaly   +5 more sources

A new dynamic formula for determining the coefficient of Smagorinsky model

Theoretical and Applied Mechanics Letters, 2011
AbstractThe most common method to determine the coefficient of Smagorinsky model now is to employ the Germano identity, however it is too complex and expensive in numerical calculation. In this letter we propose a new dynamic formula for determining the coefficient, which is based on the Kolmogorov equation of filtered velocity in physical space.
Le Fang
exaly   +2 more sources

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A hybrid dynamic Smagorinsky model for large eddy simulation

International Journal of Heat and Fluid Flow, 2020
Abstract A hybrid dynamic subgrid-scale model (HDSM) pertaining to Large-eddy simulation (LES) has been developed. The coefficient obtained by German dynamic Smagorinsky model (DSM) was integrated with a new dynamic coefficient, based on the dynamic subgrid characteristic length and controlled by the subgrid-scale (SGS) motions.
Yuanping He, Zhaolin Gu, Nyuk Hien Wong   +2 more
exaly   +2 more sources

Dynamic Smagorinsky model on anisotropic grids [PDF]

Physics of Fluids, 1997
To examine the performance of the dynamic Smagorinsky model in a controlled fashion on anisotropic grids, simulations of forced isotropic turbulence are performed using highly anisotropic discretizations. The resulting model coefficients are compared with an earlier prediction.
Charles Meneveau, Alberto Scotti
exaly   +3 more sources

Development of a new dynamic smagorinsky model by an artificial neural network for prediction of outdoor airflow and pollutant dispersion

Building and Environment, 2023
Qingyan Chen, Sumei Liu, Ting Dai
exaly   +2 more sources

Horizontal Momentum Diffusion in GCMs Using the Dynamic Smagorinsky Model

Monthly Weather Review, 2013
Abstract A dynamic version of Smagorinsky’s diffusion scheme is presented that is applicable for large-eddy simulations (LES) of the atmospheric dynamics. The approach is motivated (i) by the incompatibility of conventional hyperdiffusion schemes with the conservation laws, and (ii) because the conventional Smagorinsky model (which ...
Erich Becker, Urs Schaefer-Rolffs
exaly   +2 more sources

A dynamic Smagorinsky model with dynamic determination of the filter width ratio

Physics of Fluids, 2004
Various low-pass, spatial test filters specific to dynamic model large-eddy simulation (LES) on finite element topologies are proposed and analyzed. A number of simulations of decaying isotropic turbulence are performed using the stabilized finite element method of Whiting and Jansen with the purpose of understanding the dependence of the dynamic model
Tejada-Martínez, Andrés E., Jansen, Kenneth E.   +1 more
openaire   +1 more source