Torsional vibration of size-dependent viscoelastic rods using nonlocal strain and velocity gradient theory
Sign Up to like & getrecommendations! Published in 2018 at "Composite Structures"
DOI: 10.1016/j.compstruct.2017.12.002
Abstract: Abstract In this paper the torsional vibration of size-dependent viscoelastic nanorods embedded in an elastic medium with different boundary conditions is investigated. The novelty of this study consists of combining the nonlocal theory with the… read more here.
Keywords: size dependent; theory; vibration; nonlocal strain ... See more keywords
2-D inversion of P-wave polarization data to obtain maps of velocity gradient
Sign Up to like & getrecommendations! Published in 2017 at "Physics of the Earth and Planetary Interiors"
DOI: 10.1016/j.pepi.2017.09.005
Abstract: Abstract Gradient mapping is a technique employed in the interpretation of tomographic velocity images for delineating geological structures. In this paper, a tomographic method is proposed for determining relative velocity gradient field from seismic polarization… read more here.
Keywords: polarization; method; relative velocity; velocity gradient ... See more keywords
Invariants of velocity gradient tensor in supersonic turbulent pipe, nozzle, and diffuser flows
Sign Up to like & getrecommendations! Published in 2018 at "Physics of Fluids"
DOI: 10.1063/1.5004468
Abstract: Velocity gradient tensor (VGT) analysis of high-order accurate direct numerical simulation data of supersonic pipe, nozzle, and diffuser flows at computationally moderate Reynolds numbers is performed. Joint probability density functions of second and third invariants… read more here.
Keywords: diffuser flows; nozzle diffuser; velocity gradient; pipe nozzle ... See more keywords
An objective version of the Rortex vector for vortex identification
Sign Up to like & getrecommendations! Published in 2019 at "Physics of Fluids"
DOI: 10.1063/1.5095624
Abstract: Vortices are a ubiquitous natural phenomenon, and their structure, shape, and characteristics should be independent of the observer, which implies that the vortex identification method or vortex definition should maintain its objectivity. Currently, most of… read more here.
Keywords: velocity gradient; definition; vortex identification; gradient tensor ... See more keywords
Parallel and perpendicular alignments of velocity gradient and magnetic field observed in the molecular clouds L1478 and L1482
Sign Up to like & getrecommendations! Published in 2022 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stad1513
Abstract: Star formation is a complex process that typically occurs in dense regions of molecular clouds mainly regulated by magnetic fields, magnetohydrodynamic (MHD) turbulence, and self-gravity. However, it remains a challenging endeavor to trace the magnetic… read more here.
Keywords: self gravity; l1478 l1482; molecular clouds; velocity gradient ... See more keywords
Physics-informed machine learning of the Lagrangian dynamics of velocity gradient tensor
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review Fluids"
DOI: 10.1103/physrevfluids.6.094607
Abstract: Reduced models describing the Lagrangian dynamics of the Velocity Gradient Tensor (VGT) in Homogeneous Isotropic Turbulence (HIT) are developed under the Physics-Informed Machine Learning (PIML) framework. We consider VGT at both Kolmogorov scale and coarse-grained… read more here.
Keywords: gradient tensor; lagrangian dynamics; physics informed; physics ... See more keywords
Stagnation heat flux estimation in spherically blunt axisymmetric hypersonic models
Sign Up to like & getrecommendations! Published in 2022 at "Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering"
DOI: 10.1177/09544100221124799
Abstract: Hypersonic flows have high heat transfer rates, and their management is essential to avoid detrimental effects. Since accurate prediction and measurement of heat flux in hypersonic test facilities are complicated, heat flux at the stagnation… read more here.
Keywords: heat flux; tangential velocity; blunt axisymmetric; heat ... See more keywords
Using High-Order Particle Velocity Gradient Polarization Characteristics to Detect Underwater Coherent Interference
Sign Up to like & getrecommendations! Published in 2023 at "Journal of Marine Science and Engineering"
DOI: 10.3390/jmse11051027
Abstract: Detection of underwater coherent interference is necessary as its presence affects the estimation of the desired target. In this work, a method based on high-order particle velocity gradient polarization characteristics is proposed to distinguish the… read more here.
Keywords: order particle; particle velocity; high order; interference ... See more keywords