V. Lisý
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Effect of Magnetic Field on Neutral Bath Containing Charged Brownian Particles Open
Based on the Zwanzig-Caldeira-Legget theory generalized to systems under the influence of a static magnetic field, we obtain equations of motion for the Brownian particle (BP) and oscillators constituting the bath in which the BP is embedd…
Brownian motion in a viscous fluid of particles with constant and time-dependent friction Open
The Brownian motion (BM) of particles in a fluid under the influence of a moving harmonic potential is described analytically. It is assumed that the bath is viscous and particles constituting it experience Stokes' force with friction coef…
Revisiting the work "Brownian motion with time-dependent friction and single-particle dynamics in liquids" by Lad, Patel, and Pratap [Phys. Rev. E 105, 064107 (2022)] Open
Recently, Lad, Patel, and Pratap (LP&P) [Phys. Rev. E 105, 064107 (2022)] revisited a microscopic theory of molecular motion in liquids, proposed by Glass and Rice [Phys. Rev. 176, 239 (1968)]. Coming from this theory, LP&P derived a new e…
Generalized Langevin equation for solute dynamics in fluids with time-dependent friction Open
The generalized Langevin equation (GLE) for a Brownian particle (BP) in a bath under the influence of a moving external harmonic potential is derived. It is assumed that the friction coefficients of the bath particles depend on time. The f…
Generalized Langevin equations and fluctuation-dissipation theorem for particle-bath systems in electric and magnetic fields Open
The Brownian motion of a particle immersed in a medium of charged particles is considered when the system is placed in magnetic or electric fields. Coming from the Zwanzig-Caldeira-Legget particle-bath model, we modify it so that not only …
Nanofluid Based on New Generation Transformer Oil: Synthesis and Flow Properties Open
In this paper, we focused on synthesis, basic characterization and flow properties of nanofluids in which a new generation transformer oil as carried liquid was used.These oils are known as GTL based transformer oils due to Gas-To-Liquids …
Brownian Motion of Charged Particles in a Bath Responding to an External Magnetic Field Open
We consider the Brownian motion in a constant magnetic field.Unlike in the previous theories, both the Brownian particle and the surrounding bath particles, if they are charged, respond to the external field.The bath particles are regarded…
NMR measurements and all-time Brownian movement with memory Open
In the present work, by using the method of accumulation of phase shifts in the rotating frame, the attenuation function S(t) of the NMR signal from an ensemble of spin-bearing particles in a magnetic-field gradient is expressed through th…
NMR signals within the generalized Langevin model for fractional Brownian motion Open
The methods of Nuclear Magnetic Resonance belong to the best developed and often used tools for studying random motion of particles in different systems, including soft biological tissues. In the long-time limit the current mathematical de…
View article: Rheological and Thermal Transport Characteristics of a Transformer Oil Based Ferrofluid
Rheological and Thermal Transport Characteristics of a Transformer Oil Based Ferrofluid Open
Ferrofluids based on insulating liquids are intensively studied as a potential substitute of liquid dielectric in high voltage technologies. In this work we focus on the experimental investigation of flow and thermal transport characterist…
Fractional Langevin Equation Model for Characterization of Anomalous Brownian Motion from NMR Signals Open
Nuclear magnetic resonance is often used to study random motion of spins in different systems. In the long-time limit the current mathematical description of the experiments allows proper interpretation of measurements of normal and anomal…
Electro-Rheological Properties of Transformer Oil-Based Magnetic Fluids Open
The aim of this work was to study rheological behavior of nanofluids affected by electric field and temperature.We used transformer oil-based magnetic fluids, the suspensions of permanently magnetized colloidal particles (Fe3O4) coated by …
Effect of Stochastic Dynamics on the Nuclear Magnetic Resonance in a Field Gradient Open
In the present contribution, the attenuation function S(t) for an ensemble of spins in a magnetic-field gradient is calculated through an accumulation of the phase shifts in the rotating frame resulting from the changes of the particle dis…
Comment on “Motional Averaging of Nuclear Resonance in a Field Gradient” Open
In the Letter by Nanette N. Jarenwattananon and Louis-S. Bouchard [PRL 114,\n197601 (2015)] an NMR experiment on gases in the presence of a magnetic-field\ngradient has been considered. As distinct from the traditional description of\nmole…
An Efficient Method to Study Nondiffusive Motion of Brownian Particles Open
\nThe experimental access to short timescales has pointed to the inadequacy of the standard Langevin theory of the Brownian motion (BM) in fluids. The hydrodynamic theory of the BM describes well the observed motion of the particles; howev…
Statistical Properties of Thermal Noise Driving the Brownian Particles in Fluids Open
\nIn several recent works high-resolution interferometric detection allowed to study the Brownian motion of optically trapped microparticles in air and fluids. The observed positional fluctuations of the particles are well described by the…