Journal ArticleDOI
Use of dynamic schlieren interferometry to study fluctuations during free diffusion.
TLDR
A form of schlieren interferometry is used to measure the mean-squared amplitude and temporal autocorrelation function of concentration fluctuations driven by the presence of a gradient during the free diffusion of a urea solution into water.Abstract:
We used a form of schlieren interferometry to measure the mean-squared amplitude and temporal autocorrelation function of concentration fluctuations driven by the presence of a gradient during the free diffusion of a urea solution into water. By taking and processing sequences of images separated in time by less than the shortest correlation time of interest, we were able to simultaneously measure dynamics at a number of different wave vectors. The technique is conceptually similar to the shadowgraph method, which has been used to make similar measurements, but the schlieren method has the advantage that the transfer function is wave-vector independent rather than oscillatory.read more
Citations
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Journal ArticleDOI
Mass Diffusion and Thermal Diffusivity of the Decane-pentane Mixture Under High Pressure as a Ground-based Study for SCCO Project
TL;DR: In this paper, a dynamic analysis of the light scattered by concentration non-equilibrium fluctuations in the binary mixture was used to obtain the mass diffusion coefficients of the mixture at each temperature and pressure.
Journal ArticleDOI
Characterization of anisotropic nano-particles by using depolarized dynamic light scattering in the near field
Doriano Brogioli,Domenico Salerno,Valeria Cassina,Stefano Sacanna,Albert P. Philipse,Fabrizio Croccolo,Francesco Mantegazza +6 more
TL;DR: This work reports for the first time data obtained with a dynamic near field scattering instrument, measuring both polarized and depolarized scattered light and measuring the translational and rotational diffusion coefficients of rod-like colloidal particles.
Journal ArticleDOI
Concentration dependent refractive index of a binary mixture at high pressure
TL;DR: While the measured refractive indices agree very well with predictions given by Looyenga, the measured concentration CFs show deviations from the latter of the order of 6% and more than the double from the Lorentz-Lorenz predictions.
Journal ArticleDOI
Analysis of Non-Equilibrium Fluctuations In A Ternary Liquid Mixture
TL;DR: In this paper, the authors evaluated the theoretical amplitudes of the two composition modes of the refractive-index fluctuations of a ternary mixture of tetralin, isobutylbenzene and n-dodecane.
Journal ArticleDOI
Quasi-real-time analysis of dynamic near field scattering data using a graphics processing unit
TL;DR: An optimized data management scheme is introduced thereby limiting the number of operations required and the processing time is reduced from hours to minutes, for typical experimental conditions.
References
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Book
CRC Handbook of Chemistry and Physics
TL;DR: CRC handbook of chemistry and physics, CRC Handbook of Chemistry and Physics, CRC handbook as discussed by the authors, CRC Handbook for Chemistry and Physiology, CRC Handbook for Physics,
Book
Dynamic Light Scattering: With Applications to Chemistry, Biology, and Physics
Bruce J. Berne,R. Pecora +1 more
TL;DR: In this paper, a comprehensive introduction to principles underlying laser light scattering focuses on time dependence of fluctuations in fluid systems and provides an introduction to theory of time correlation functions, with chapters on projection operator techniques in statistical mechanics.
Journal ArticleDOI
Spiral defect chaos in large aspect ratio Rayleigh-Bénard convection.
TL;DR: The correlation length of the pattern decreased rapidly with increasing control parameter so that the size of a correlated area became much smaller than the area of the cell, suggesting that the chaotic behavior is intrinsic to large aspect ratio geometries.
Journal ArticleDOI
Ultralow-angle dynamic light scattering with a charge coupled device camera based multispeckle, multitau correlator
Luca Cipelletti,David A. Weitz +1 more
TL;DR: In this article, a multi-tau software correlator was used to measure dynamic light scattering at many angles simultaneously, from 0.07° to 5.1°, in order to cover the wide spectrum of decay times associated with the large range of accessible angles, where the correlator channel spacing is quasilogarithmic rather than linear.