Meridional Motion and Reynolds Stress from Debrecen Photoheliographic Data
Sign Up to like & getrecommendations! Published in 2017 at "Solar Physics"
DOI: 10.1007/s11207-017-1105-4
Abstract: The Debrecen Photoheliographic Data catalogue is a continuation of the Greenwich Photoheliographic Results providing daily positions of sunspots and sunspot groups. We analyse the data for sunspot groups focussing on meridional motions and transfer of… read more here.
Keywords: motion; debrecen photoheliographic; photoheliographic data; reynolds stress ... See more keywords
Meridional Motions and Reynolds Stress Determined by Using Kanzelhöhe Drawings and White Light Solar Images from 1964 to 2016
Sign Up to like & getrecommendations! Published in 2018 at "Solar Physics"
DOI: 10.1007/s11207-018-1286-5
Abstract: Sunspot position data obtained from Kanzelhöhe Observatory for Solar and Environmental Research (KSO) sunspot drawings and white light images in the period 1964 to 2016 were used to calculate the rotational and meridional velocities of… read more here.
Keywords: 1964 2016; meridional motions; drawings white; rotation ... See more keywords
Application of deep learning method to Reynolds stress models of channel flow based on reduced-order modeling of DNS data
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Hydrodynamics"
DOI: 10.1007/s42241-018-0156-9
Abstract: Recently, the methodology of deep learning is used to improve the calculation accuracy of the Reynolds-averaged Navier-Stokes (RANS) model. In this paper, a neural network is designed to predict the Reynolds stress of a channel… read more here.
Keywords: dns; deep learning; channel flow; reynolds stress ... See more keywords
Reynolds stress modelling of wake interference of two cylinders in tandem: Conventional vs. eddy-resolving closure
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Heat and Fluid Flow"
DOI: 10.1016/j.ijheatfluidflow.2017.07.012
Abstract: Abstract A differential, near-wall Reynolds stress model (RSM) employed in Unsteady RANS (Reynolds-Averaged Navier–Stokes) framework, coupled with the equation governing the inverse turbulent time scale relying on the so-called 'homogeneous dissipation' rate ( ω h… read more here.
Keywords: stress modelling; eddy resolving; modelling wake; reynolds stress ... See more keywords
A numerical study of a rectangular jet along a shear free boundary: Surface jet
Sign Up to like & getrecommendations! Published in 2020 at "International Journal of Heat and Fluid Flow"
DOI: 10.1016/j.ijheatfluidflow.2020.108723
Abstract: Abstract A numerical simulation of a rectangular surface jet is performed at a Reynolds number of Re j = 4400 . The global parameters of the jet e.g. maximum velocity decay, jet surface normal and… read more here.
Keywords: jet; surface; study; lateral direction ... See more keywords
Euler-Euler Multiphase CFD-Simulation with Full Reynolds Stress Model and Anisotropic Bubble-induced Turbulence
Sign Up to like & getrecommendations! Published in 2018 at "International Journal of Multiphase Flow"
DOI: 10.1016/j.ijmultiphaseflow.2017.10.012
Abstract: Abstract In the present work, Euler–Euler modeling of bubbly flows is combined with a full Reynolds stress model for the turbulence in the liquid carrier phase. Reynolds stress models have only rarely been explored in… read more here.
Keywords: euler; turbulence; euler euler; reynolds stress ... See more keywords
Evaluation of k-ε Reynolds stress modeling in an idealized urban canyon using LES
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Wind Engineering and Industrial Aerodynamics"
DOI: 10.1016/j.jweia.2018.01.034
Abstract: Abstract In this study, a large-eddy simulation (LES) was conducted to investigate the validity of the modeling of Reynolds stress in standard k-e model (k-e model) for urban canyon flow. It was confirmed that the… read more here.
Keywords: canyon flow; diffusion; canyon; urban canyon ... See more keywords
Scale interactions in turbulent rotating planar Couette flow: insight through the Reynolds stress transport
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2019.668
Abstract: In turbulent planar Couette flow under anticyclonic spanwise system rotation, large-scale roll-cell structures arise due to a Coriolis-force-induced instability. The structures are superimposed on smaller-scale turbulence, and with increasing angular velocity ( $\unicode[STIX]{x1D6FA}_{z}$ ) such… read more here.
Keywords: stress transport; turbulence; rotation; reynolds stress ... See more keywords
Magnetic configuration effects on the Reynolds stress in the plasma edge
Sign Up to like & getrecommendations! Published in 2018 at "Physics of Plasmas"
DOI: 10.1063/1.5037511
Abstract: Breaking the poloidal symmetry of the magnetic shear induced tilt of turbulent structures, by either divertor X-point resistivity or limiter positions, can lead to a finite (residual) contribution to the flux-surface averaged radial-binormal Reynolds stress.… read more here.
Keywords: field; radial electric; geometry; reynolds stress ... See more keywords
Calibration of the Reynolds Stress Model for the Simulation of Gas Flows in Corrugated Tubes
Sign Up to like & getrecommendations! Published in 2018 at "Heat Transfer Engineering"
DOI: 10.1080/01457632.2017.1363632
Abstract: ABSTRACT Tubes with corrugated surfaces can clearly increase the overall heat transfer coefficient in comparison to smooth tubes. Due to the additional influence of different curved surfaces, the analytical calculation of the overall heat transfer… read more here.
Keywords: corrugated tubes; turbulence; model; reynolds stress ... See more keywords
Spatio-temporal structure of turbulent Reynolds stress zonal flow drive in 3D magnetic configuration
Sign Up to like & getrecommendations! Published in 2017 at "New Journal of Physics"
DOI: 10.1088/1367-2630/aa67af
Abstract: The poloidal dependence of the zonal flow drive and the underlying Reynolds stress structure are studied at the stellarator experiment TJ-K by means of a poloidal Langmuir-probe array. This gives the unique possibility to study… read more here.
Keywords: zonal flow; geometry; flow drive; reynolds stress ... See more keywords