Bivariate 2D empirical mode decomposition for analyzing instantaneous turbulent velocity field in unsteady flows
Sign Up to like & getrecommendations! Published in 2019 at "Experiments in Fluids"
DOI: 10.1007/s00348-019-2775-5
Abstract: We introduce and demonstrate the bivariate two-dimensional empirical mode decomposition (bivariate 2D-EMD) for the decomposition of a turbulent instantaneous velocity field to separate spatial large-scale organized motion from random turbulent fluctuations. To validate this approach,… read more here.
Keywords: velocity field; velocity; decomposition; empirical mode ... See more keywords
Tomographic PIV measurements and RANS simulations of secondary flows inside a horizontally positioned helically coiled tube
Sign Up to like & getrecommendations! Published in 2020 at "Experiments in Fluids"
DOI: 10.1007/s00348-020-02950-6
Abstract: Abstract Helically coiled tubes are widely used in industry to enhance heat and mass transfer in the laminar flow regime, due to their secondary flow pattern. In this study, tomographic particle image velocimetry (tomo-PIV) is… read more here.
Keywords: velocity field; velocity; coiled tube; helically coiled ... See more keywords
On the uniqueness of a shear-vorticity-acceleration-free velocity field in space-times
Sign Up to like & getrecommendations! Published in 2019 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-019-2607-1
Abstract: AbstractWe prove that in space-times a velocity field that is shear, vorticity and acceleration-free, if any, is unique up to reflection, with these exceptions: generalized Robertson-Walker space-times whose space sub-manifold is warped, and twisted space-times… read more here.
Keywords: velocity field; shear vorticity; space; space times ... See more keywords
Pressure and shear stress analysis in a normal triangular tube bundle based on experimental flow velocity field
Sign Up to like & getrecommendations! Published in 2020 at "Journal of the Brazilian Society of Mechanical Sciences and Engineering"
DOI: 10.1007/s40430-020-02293-7
Abstract: This paper presents the experimental vector velocity field obtained through the spatial filter velocimetry technique in a normal triangular tube bundle test section with tubes of 20 mm O.D. and transverse pitch of 25.2 mm. The experiments… read more here.
Keywords: velocity field; field; triangular tube; velocity ... See more keywords
Wandering corrections from PIV measurements of tornado-like vortices
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Wind Engineering and Industrial Aerodynamics"
DOI: 10.1016/j.jweia.2019.02.010
Abstract: Abstract Wandering of tornado-like vortices consists in random oscillations of the vortex core from its time-averaged position, which complicates efforts to characterize vortex characteristics. A procedure is then necessary to retrieve characteristics of tornado-like vortices… read more here.
Keywords: like vortices; velocity field; tornado like; procedure ... See more keywords
An improved empirical model for a semiconductor’s velocity-field characteristic applied to gallium arsenide
Sign Up to like & getrecommendations! Published in 2021 at "Solid State Communications"
DOI: 10.1016/j.ssc.2021.114240
Abstract: Abstract An effective empirical model for the velocity-field characteristic associated with a semiconductor offers the community of semiconductor device engineers with a tool that will ultimately allow them to relate key features of a semiconductor’s… read more here.
Keywords: velocity field; field; field characteristic; empirical model ... See more keywords
Using Lagrangian Filtering to Remove Waves From the Ocean Surface Velocity Field
Sign Up to like & getrecommendations! Published in 2023 at "Journal of Advances in Modeling Earth Systems"
DOI: 10.1029/2022ms003220
Abstract: The Surface Water and Ocean Topography satellite will measure altimetry on scales down to about 15 km: at these scales, the sea‐surface‐height signature of inertia‐gravity waves, including barotropic tides and internal tides, will be visible.… read more here.
Keywords: ocean surface; inertia gravity; lagrangian filtering; velocity field ... See more keywords
Prediction model of velocity field around circular cylinder over various Reynolds numbers by fusion convolutional neural networks based on pressure on the cylinder
Sign Up to like & getrecommendations! Published in 2018 at "Physics of Fluids"
DOI: 10.1063/1.5024595
Abstract: A data-driven model is proposed for the prediction of the velocity field around a cylinder by fusion convolutional neural networks (CNNs) using measurements of the pressure field on the cylinder. The model is based on… read more here.
Keywords: velocity field; field around; fusion convolutional; cylinder ... See more keywords
Improper integrals as a puzzle for creeping flow around an ellipsoid
Sign Up to like & getrecommendations! Published in 2019 at "Physics of Fluids"
DOI: 10.1063/1.5050510
Abstract: The general ellipsoid immersed in the quadratic ambient velocity field Hijkxjxk with the origin at the ellipsoid center will exhibit an additional Faxen law contribution to the hydrodynamic drag because of the ambient pressure gradient.… read more here.
Keywords: disturbance velocity; velocity field; field; velocity ... See more keywords
The Effect of the Ratio of the Secondary and Tertiary Air on the Outlet Velocity Field of the New Swirling Pulverized Coal Burner
Sign Up to like & getrecommendations! Published in 2021 at "Combustion Science and Technology"
DOI: 10.1080/00102202.2021.1990274
Abstract: The outlet velocity field of the pulverized coal burner is one of the important factors affecting its operating characteristics. In this article, cold tests were carried out for a new swirl burner ... read more here.
Keywords: velocity field; coal burner; outlet velocity; pulverized coal ... See more keywords
The fluctuating velocity field of a forced planar impinging gas jet
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Turbulence"
DOI: 10.1080/14685248.2018.1513137
Abstract: ABSTRACTThe fluctuating velocity field of a planar impinging gas jet is studied using particle image velocimetry, while anti-symmetrically forcing the jet column at the nozzle exit using planar synthetic jets. The jet exit velocity is… read more here.
Keywords: velocity field; jet; velocity; planar impinging ... See more keywords