Results 61 to 70 of about 66,556 (207)

Friction force on a vortex due to the scattering of superfluid excitations in helium II

, 2002
The longitudinal friction acting on a vortex line in superfluid $^4$He is investigated within a simple model based on the analogy between such vortex dynamics and that of the quantal Brownian motion of a charged point particle in a uniform magnetic field.
C.F. Barenghi, D. M. Jezek, D.C. Samuels, D.J. Thouless, D.P. Arovas, E. Demircan, E.B. Sonin, G.W. Rayfield, H. M. Cataldo, H.E. Hall, H.M. Cataldo, H.M. Cataldo, H.M. Cataldo, J.-M. Tang, J.D.P. Van Dijk, J.M. Duan, L.P. Pitaevskii, P.O. Fedichev, Q. Niu, R. Sasik, R.J. Donnelly, S.V. Iordanskii   +21 more
core   +1 more source

Photophoretic manipulation of absorbing aerosol particles with vortex beams: theory versus experiment [PDF]

, 2015
We develop a theoretical approach for describing the optical trapping and manipulation of carbon nanoclusters in air with a dual-vortex optical trap, as realized recently in experiment [V. Shvedov et al., Opt. Express 17, 5743 (2009)].
Desyatnikov, Anton S, Kivshar, Yuri, Krolikowski, Wieslaw, Rode, Andrei V, Shvedov, Vladlen   +4 more
core   +1 more source

Helicopter rotor wake geometry and its influence in forward flight. Volume 2: Wake geometry charts [PDF]

Isometric and projection view plots, inflow ratio nomographs, undistorted axial displacement nomographs, undistorted longitudinal and lateral coordinates, generalized axial distortion nomographs, blade/vortex passage charts, blade/vortex intersection ...
Egolf, T. A., Landgrebe, A. J.
core   +1 more source

Longitudinal Force on a Moving Potential

, 1998
We show a formal result of the longitudinal force acting on a moving potential. The potential can be velocity-dependent, which appears in various interesting physical systems, such as electrons in the presence of a magnetic flux-line, or phonons ...
C. Wexler, D. J. Thouless, D. J. Thouless, E. B. Sonin, G. E. Volovik, H. E. Hall, Jian-Ming Tang, L. Bönig, L. P. Pitaevskii, M. R. Geller, N. B. Kopnin, S. V. Iordanskii, Y. Aharonov   +12 more
core   +1 more source

Mechanical Characterisation and Analysis of a Passive Micro Heat Exchanger

Micromachines, 2020
Heat exchangers are widely used in many mechanical, electronic, and bioengineering applications at macro and microscale. Among these, the use of heat exchangers consisting of a single fluid passing through a set of geometries at different temperatures ...
Francisco-Javier Granados-Ortiz, Joaquín Ortega-Casanova   +1 more
doaj   +1 more source

Pinning Induced Fluctuations on Driven Vortices

, 2005
We use a simple model to study the long time fluctuations induced by random pinning on the motion of driven non--interacting vortices. We find that vortex motion seen from the co--moving frame is diffusive and anisotropic, with velocity dependent ...
Alejandro B. Kolton, Balents, Cugliandolo, Horner, Kolton, Kolton, Koshelev, Le Doussal, Scheidl, Scheidl   +9 more
core   +2 more sources

Vortices produced by swirl-mixing grids in nuclear fuel assembly: a wind-tunnel experiment

Flow
Longitudinal vortices produced by a swirl-mixing grid are experimentally explored in an upscaled model of nuclear fuel assembly. The flow is mapped using particle image velocimetry in several planes downstream of the grid.
Matěj Dolejš, Daniel Duda, Vojtěch Janský, Anna Mrázová, Václav Uruba, Vitalii Petrovych Yanovych, Ingrid Karoline Vasconcelos da Silva, Kateryna Viktorivna Kovalova   +7 more
doaj   +1 more source

Distinct vortex-glass phases in Yb$_{3}$Rh$_{4}$Sn$_{13}$ at high and low magnetic fields

, 2015
The vortex lattice (VL) in the mixed state of the stannide superconductor Yb$_{3}$Rh$_{4}$Sn$_{13}$ has been studied using small-angle neutron scattering (SANS).
Dewhurst, C. D., Gavilano, J. L., Kenzelmann, M., Mazzone, D. G., Ramakrishnan, M., Sibille, R.   +5 more
core   +1 more source

Vortex/inflectional-wave interactions with weakly three-dimensional input [PDF]

, 2002
The subtle impact of the spanwise scaling in nonlinear interactions between oblique instability waves and the induced longitudinal vortex field is considered theoretically for the case of a Rayleigh-unstable boundary-layer flow, at large Reynolds numbers.
Smith, FT, Timoshin, SN
core   +1 more source

A systematic correlation between two-dimensional flow topology and the abstract statistics of turbulence

, 2002
Velocity differences in the direct enstrophy cascade of two-dimensional turbulence are correlated with the underlying flow topology. The statistics of the transverse and longitudinal velocity differences are found to be governed by different structures ...
A. Babiano, A. Okubo, B. L. Hua, C. Basdevant, G. Batchelor, G. Eyink, J. McWilliams, J. Weiss, J. C. McWilliams, Maarten A. Rutgers, R. Kraichnan, R. Robert, U. Frisch, W. Brent Daniel, Y. Couder   +14 more
core   +1 more source