Results 1 to 10 of about 22,053 (245)

Diffusion Coefficient of a Brownian Particle in Equilibrium and Nonequilibrium: Einstein Model and Beyond

open access: yesEntropy, 2022
The diffusion of small particles is omnipresent in many processes occurring in nature. As such, it is widely studied and exerted in almost all branches of sciences.
Jakub Spiechowicz   +3 more
doaj   +1 more source

Thermo diffusion and diffusion thermo impacts on bioconvection Walter-B nanomaterial involving gyrotactic microorganisms

open access: yesAlexandria Engineering Journal, 2021
Here magnetohydrodynamic (MHD) bioconvection Walter-B nanofluid flow due to stretched sheet is considered. Significance of motile gyrotactic microorganisms and melting phenomena are scrutinized.
T. Hayat   +3 more
doaj   +1 more source

Influence of Brownian Diffusion on Volume Magnetic Force in Magnetic Fluids [PDF]

open access: yesЖурнал нано- та електронної фізики, 2016
Since magnetic fluid is a colloid of magnetic particles the processes of magnetophoresis and Brownian diffusion have to take place in them in the presence of a strong non uniform magnetic field The present work deals with experimental investigations of ...
V. Bashtovoi   +4 more
doaj   +1 more source

Log-Normal Superstatistics for Brownian Particles in a Heterogeneous Environment

open access: yesPhysics, 2020
Superstatistical approaches have played a crucial role in the investigations of mixtures of Gaussian processes. Such approaches look to describe non-Gaussian diffusion emergence in single-particle tracking experiments realized in soft and biological ...
Maike Antonio Faustino dos Santos   +1 more
doaj   +1 more source

The flashing Brownian ratchet and Parrondo’s paradox [PDF]

open access: yesRoyal Society Open Science, 2018
A Brownian ratchet is a one-dimensional diffusion process that drifts towards a minimum of a periodic asymmetric sawtooth potential. A flashing Brownian ratchet is a process that alternates between two regimes, a one-dimensional Brownian motion and a ...
S. N. Ethier, Jiyeon Lee
doaj   +1 more source

Numerical modeling of nanoparticles transport effect in mixed convection of nanoï‌‚uid with variable properties in a square cavity with inlet and outlet port [PDF]

open access: yesمجله مدل سازی در مهندسی, 2014
In this paper, the flow field, heat transfer and nanoparticles transport in Al2O3-water nanofluid mixed convection in a square enclosure with inlet and outlet port has been studied numerically. The dimensionless transport equations are solved numerically
G. A. Sheikhzadeh, S.P. Ghaffari
doaj   +1 more source

Bioconvection transport of upper convected Maxwell nanoliquid with gyrotactic microorganism, nonlinear thermal radiation, and chemical reaction

open access: yesNanotechnology Reviews, 2023
The microorganisms’ concept has appealed substantial consideration of modern researchers because of its utilization in commercial and industrial products, for illustration, biofuel (prepared from the waste), drug delivery, and fertilizers.
Li Shuguang   +6 more
doaj   +1 more source

Brownian Pump in Nonlinear Diffusive Media [PDF]

open access: yesThe Journal of Physical Chemistry B, 2008
15 pages, 9 ...
Ai, Bao-quan, Liu, Liang-gang
openaire   +3 more sources

Slices of the Anomalous Phase Cube Depict Regions of Sub- and Super-Diffusion in the Fractional Diffusion Equation

open access: yesMathematics, 2021
Fractional-order time and space derivatives are one way to augment the classical diffusion equation so that it accounts for the non-Gaussian processes often observed in heterogeneous materials.
Richard L. Magin, Ervin K. Lenzi
doaj   +1 more source

Diffusing Diffusivity: A Model for Anomalous, yet Brownian, Diffusion [PDF]

open access: yesPhysical Review Letters, 2014
Wang et al. [Proc. Natl. Acad. Sci. U.S.A. 106, 15160 (2009)] have found that in several systems the linear time dependence of the mean-square displacement (MSD) of diffusing colloidal particles, typical of normal diffusion, is accompanied by a non-Gaussian displacement distribution G(x,t), with roughly exponential tails at short times, a situation ...
Mykyta V, Chubynsky, Gary W, Slater
openaire   +2 more sources

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