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Relaxation-Time Approximation

2017
AbstractA conserving relaxation time approximation is presented resulting into a Mermin-type of polarisation functions. The transport properties are calculated for the relaxation time approximation and an arbitrary band structure. The results for metals and gases are discussed and the shortcoming of relaxation time approximation to describe ...
K. Morawetz
openaire   +2 more sources

Multiple-relaxation-time lattice Boltzmann method for the Navier-Stokes and nonlinear convection-diffusion equations: Modeling, analysis, and elements.

Physical Review E, 2020
In this paper, we first present a unified framework of multiple-relaxation-time lattice Boltzmann (MRT-LB) method for the Navier-Stokes and nonlinear convection-diffusion equations where a block-lower-triangular-relaxation matrix and an auxiliary source ...
Z. Chai, B. Shi
semanticscholar   +1 more source

Electron-Ion Relaxation Times

The Physics of Fluids, 1964
The approach to equilibrium of the electron and ion components of a plasma has been studied. The interactions between particle pairs are determined in a polarizable plasma, so that collective effects are included at the outset. The pairwise interactions are treated quantum mechanically, in the Born approximation, whereas the collective effects are, in ...
Rand, S., Albini, F. A.
openaire   +1 more source

Dielectric relaxation time spectroscopy

IEEE Transactions on Biomedical Engineering, 2000
A new mathematical method is developed to recover the permittivity relaxation spectrum of living tissue from measurements of the real and imaginary parts of the impedance. Aiming to derive information about electrical properties of living tissue without the prior selection of any impedance model, the procedure calculates the relaxation time ...
K S, Paulson, S, Jouravleva, C N, McLeod
openaire   +2 more sources

Extensional Relaxation Time, Pinch-Off Dynamics, and Printability of Semidilute Polyelectrolyte Solutions

Macromolecules, 2018
Quantitative studies of capillary-driven thinning and pinch-off dynamics of semidilute polyelectrolyte solutions, and their response to extensional flows, typically encountered in drop formation applications, are relatively rare and are the focus of this
L. N. Jimenez   +3 more
semanticscholar   +1 more source

Relaxation times and microstructures

NMR in Biomedicine, 2001
AbstractA discussion is presented of the evaluation of multiple relaxation components from water protons in biological tissue. The principal focus is to draw attention to the way in which limitations in the raw NMR data, such as signal‐to‐noise ratio, data sampling density and acquisition window width, affect the precision and resolution in the ...
F R, Fenrich, C, Beaulieu, P S, Allen
openaire   +2 more sources

Polymer Relaxation Times from Birefringence Relaxation Measurements

The Journal of Chemical Physics, 1967
A theoretical description of the time dependence of induced birefringence in polymers, based on the ``pearl-necklace'' model, is presented, and relations between relaxation and frequency dependence methods are discussed. The relaxation theory is applied to the results of measurements of the longest relaxation time for the DNA from bacteriophage T2. The
D S, Thompson, S J, Gill
openaire   +2 more sources

On relaxation times

Physics-Uspekhi, 1999
The physical background of the relation T2 = 2T1 between the transverse and longitudinal relaxation times in atomic and molecular spectroscopy is discussed.
V.L. Vaks, V.V. Mityugov
openaire   +1 more source

Artificial multimodal receptors based on ion relaxation dynamics

Science, 2020
Feeling temperature and touch The range of receptors in our skin make it possible to sense when we are touching an object and also gives us a general sense of the temperature of that object.
Insang You   +11 more
semanticscholar   +1 more source

TASEP on a Ring in Sub-relaxation Time Scale

, 2016
Interacting particle systems in the KPZ universality class on a ring of size L with O(L) number of particles are expected to change from KPZ dynamics to equilibrium dynamics at the so-called relaxation time scale $$t=O(L^{3/2})$$t=O(L3/2).
J. Baik, Zhipeng Liu
semanticscholar   +1 more source

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