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Correlated fluctuations of optically trapped particles
SPIE Proceedings, 2015We present a study of correlated Brownian fluctuations between optically confined particles in a number of different configurations. First we study colloidal particles held in separate optical tweezers. In this configuration the particles are known to interact through their hydrodynamic coupling, leading to a pronounced anti-correlation in their ...
Thomas J. Smart +4 more
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Particle–particle correlation and fluctuations in non-equilibrium Fermi/Bose gases
Solid State Communications, 2011Abstract A theory of fluctuations and correlations in non-equilibrium Fermi and Bose gases is developed. A specific quantum correlation is predicted in non-equilibrium collisional quasi-classical gases, created by collisions between particles. The expressions for correlation sources entering the equation for an equal-time two-particle correlation ...
R. Katilius, S.V. Gantsevich
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Particle-number fluctuation of pairing correlations for Dy isotopes
Chinese Physics C, 2015Within the relativistic mean field (RMF) theory, the ground state properties of dysprosium isotopes are studied using the shell-model-like approach (SLAP), in which pairing correlations are treated with particle-number conservation, and the Pauli blocking effects are taken into account exactly.
Ming-Jian Cheng, Lang Liu, Yi-Xin Zhang
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Physical Review Letters, 2011 Accepted for publication in Phys. Rev. Lett.
C Simenel
exaly +7 more sources
Particle velocity fluctuations and correlation lengths in dilute sedimenting suspensions
Physics of Fluids, 2002We measure the instantaneous velocity of particles sedimenting in a three-dimensional container at low particulate Reynolds numbers. We aim at characterizing the main specificities of the particle velocity fluctuations. We obtain the local and instantaneous Eulerian velocity field from particle image velocimetry: a thin Yag laser light sheet (about two
Bernard-Michel, G. +4 more
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EFFECTS OF PARTICLE OVERLAPPING ON TRANSMISSION FLUCTUATION SPECTROMETRY WITH TEMPORAL CORRELATION
Chemical Engineering Communications, 2009Transmission fluctuation spectrometry with temporal or spatial correlation is being developed as a new method for particle size analysis, in which the particle size distribution and particle concentration can be measured simultaneously. Based on the assumption of low particle concentrations, an analytical expression of the transmission fluctuation ...
Bin Yu +5 more
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Optics Letters, 2005
A new method of transmission fluctuation spectrometry with signal correlation was recently developed for particle-size analysis, whereby both particle-size distribution and particle concentration can be measured simultaneously. The measurements were realized with temporal correlation of the transmission fluctuation signals of a focused Gaussian beam.
Jianqi, Shen +2 more
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A new method of transmission fluctuation spectrometry with signal correlation was recently developed for particle-size analysis, whereby both particle-size distribution and particle concentration can be measured simultaneously. The measurements were realized with temporal correlation of the transmission fluctuation signals of a focused Gaussian beam.
Jianqi, Shen +2 more
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Applied Optics, 2001
At low particle concentrations number fluctuations in photon-correlation spectroscopy measurements lead to a slow decay in the autocorrelation function, which contains information about the concentration. The characteristic time tau(c) of this number-fluctuation decay depends on the size of both the particle and the scattering volume. For determination
E J, Nijman +3 more
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At low particle concentrations number fluctuations in photon-correlation spectroscopy measurements lead to a slow decay in the autocorrelation function, which contains information about the concentration. The characteristic time tau(c) of this number-fluctuation decay depends on the size of both the particle and the scattering volume. For determination
E J, Nijman +3 more
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Journal of Fluids Engineering, 2002
In this paper we present direct numerical simulations of monodisperse and polydisperse suspensions of non-Brownian particles sedimenting at low Reynolds number. We describe a scheme to generate ergodic ensembles of random particulate systems and a numerical procedure for computing interactions among spherical particles based on Ewald summation ...
F. R. Cunha +3 more
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In this paper we present direct numerical simulations of monodisperse and polydisperse suspensions of non-Brownian particles sedimenting at low Reynolds number. We describe a scheme to generate ergodic ensembles of random particulate systems and a numerical procedure for computing interactions among spherical particles based on Ewald summation ...
F. R. Cunha +3 more
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Flow Measurement and Instrumentation, 2007
Abstract The transmission signal of a narrow laser beam attenuated by particles in multiphase flow shows strong fluctuations, due to the presence and absence of particles in the beam path. The fluctuating transmission signal can be used for the measurement of both the particle size distribution (PSD) and particle concentration.
Jianqi Shen +3 more
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Abstract The transmission signal of a narrow laser beam attenuated by particles in multiphase flow shows strong fluctuations, due to the presence and absence of particles in the beam path. The fluctuating transmission signal can be used for the measurement of both the particle size distribution (PSD) and particle concentration.
Jianqi Shen +3 more
openaire +1 more source