Results 21 to 30 of about 14,634 (264)
A Fourier approach to Lagrangian vortex detection [PDF]
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2019 We study the transport properties of coherent vortices over a finite-time duration. Here, we reveal that such vortices can be identified based on the frequency-domain representation of Lagrangian trajectories. We use Fourier analysis to convert particles’ trajectories from their time domain to a presentation in the frequency domain.
El Aouni, Anass +3 more
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Precipitation Moisture Sources of Ethiopian River Basins and Their Role During Drought Conditions
Frontiers in Earth Science, 2022 In this study, we identified and investigated the annual climatological moisture sources for the Ethiopian river basins during 1980–2018. First, according to cluster analysis, the 12 river basins of this country were grouped into four regions: northeast (
Milica Stojanovic +6 more
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Effective Lagrangian approach to the fermion mass problem [PDF]
Physical Review D, 1994 21 pages, UM-P-93/81, latex file, 1 figure available on ...
Shaw, D. S., Volkas, R. R.
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Lagrangian approach in spin-oscillations problem
Condensed Matter Physics, 2014 Lagrangian of electronic liquid in magneto-inhomogeneous micro-conductor has been constructed. A corresponding Euler-Lagrange equation has been solved. It was shown that the described system has eigenmodes of spin polarization and total electric current ...
P.V. Pyshkin +2 more
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Nonconservative Lagrangian mechanics: a generalized function approach [PDF]
Journal of Physics A: Mathematical and General, 2003 To be published in Journal of Physics A: Mathematical and General, IOP Publishing Ltd.
Dreisigmeyer, David W., Young, Peter M.
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Competing Lagrangians for incompressible and compressible viscous flow [PDF]
Royal Society Open Science, 2019 A recently proposed variational principle with a discontinuous Lagrangian for viscous flow is reinterpreted against the background of stochastic variational descriptions of dissipative systems, underpinning its physical basis from a different viewpoint ...
F. Marner +3 more
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Spectral-clustering approach to Lagrangian vortex detection [PDF]
Physical Review E, 2016 One of the ubiquitous features of real-life turbulent flows is the existence and persistence of coherent vortices. Here we show that such coherent vortices can be extracted as clusters of Lagrangian trajectories. We carry out the clustering on a weighted graph, with the weights measuring pairwise distances of fluid trajectories in the extended phase ...
Hadjighasem A +3 more
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An Augmented Lagrangian‐Based Approach to the Oseen Problem [PDF]
SIAM Journal on Scientific Computing, 2006 We describe an effective solver for the discrete Oseen problem based on an augmented Lagrangian formulation of the corresponding saddle point system. The proposed method is a block triangular preconditioner used with a Krylov subspace iteration like BiCGStab.
Michele Benzi, Maxim A. Olshanskii
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The Fundamental Lepage Form in Two Independent Variables: A Generalization Using Order-Reducibility
Mathematics, 2022 A second-order generalization of the fundamental Lepage form of geometric calculus of variations over fibered manifolds with 2-dimensional base is described by means of insisting on (i) an equivalence relation “Lepage differential 2-form is closed if and
Zbyněk Urban, Jana Volná
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Numerical modeling of droplet trajectories and collection efficiency using the Lagrangian approach
Tạp chí Khoa học và Công nghệThe paper presents a numerical method for investigating the motion of supercooled water droplets in airflow using the Lagrangian approach. The method is employed to compute droplet trajectories and capture efficiency on solid surfaces under two-phase ...
Duong De Tai
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