Current bifurcation, reversals and multiple mobility transitions of dipole in alternating electric fields

Wei, Du; Kao, Jia; Shi, Zhiyong; Nie, Linru

doi:10.1088/1674-1056/ac7dbe

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…There are some instances where the periodic force induces multiple current reversals and absolute negative mobility in periodic potential systems. [15][16][17][18][19][20] Furthermore, noise-induced phenomena have prompted researchers to investigate stochastic systems with anomalous diffusions in recent years. [21][22][23] Continuoustime random walk, fractional Fokker-Plank equation and Lévy noise are frequently used to describe systems with anomalous diffusions.…”

Section: Introductionmentioning

confidence: 99%

Symmetric Brownian motor subjected to Lévy noise

Jia

Nie

2024

Chinese Phys. B

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In the past years, one mainly focused on the symmetric Brownian motor (BM) with Gaussian noises, whose current and energy conversion efficiency are very low. Here, we investigate operating performance of the symmetric BM subjected to Lévy noise. Through numerical simulations, it is found that operating performance of the motor can be greatly improved in the asymmetric Lévy noise. Without any load, the Lévy noises with smaller stable indexes can let the motor give rise to a much greater current. With load, energy conversion efficiency of the motor can be enhanced more pronouncedly by adjusting the stable indexes of the Lévy noises with symmetry breaking. The research results are of great significance for opening up BM’s intrinsic physical mechanism and promoting development of nanotechnology.

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Section: Introductionmentioning

confidence: 99%

Symmetric Brownian motor subjected to Lévy noise

Jia

Nie

2024

Chinese Phys. B

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Control of diffusion and transition phenomena in a periodic system with temporal symmetry breaking

Jia,

Tian,

et al. 2024

Indian J Phys

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Mesoscopic study on effect of electric field and heater characteristics on saturated pool boiling heat transfer

Hu¹,

Zhang²,

Lou³

2023

Acta Phys. Sin.

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The phase change lattice Boltzmann (LB) model coupled with the electric field model is employed to investigate the heat transfer performance of saturated pool boiling. Particular attention is paid to the effects of heater surface wettability and heater length on the kinetic behaviors of bubble generation, merging, and fracture during boiling in the presence of a uniform electric field, as well as the effects of the kinetic behaviors of bubbles on the heat transfer performance. The study's findings indicate that whether the action of an electric field can enhance the boiling heat transfer is directly related to the length of the heater and the wettability. In the case of a hydrophilic surface, when the heater length L∗H ≤ 6:25, the bubble interaction force generated on the heater surface during boiling is weak due to the small size of the heater. Thus the effect of a uniform electric field on the bubble dynamic behaviors is mainly manifested by reducing the bubble size. As a result, the whole boiling phase is suppressed in this case. In the case where the heater length is 6:25 < L∗H ≤ 9:375, the uniform electric field can enhance the critical heat flux(CHF), and the enhanced percentage of CHF increases with electric field strength. This effect can be attributed to the longer heater providing sufficient space for bubble generation, resulting in the activation of more bubble nucleation sites and a stronger interaction force between bubbles. On the other hand, the distance between adjacent bubbles increases with the heater length. Hence, the improved percentage of CHF increase as the heater length. When L∗H > 9:375, the rewetting resistance increases with increasing heater length. So the vapor generated during the boiling process is easily tightened to the heating surface under the action of electric field force, and it forms a thin layer of vapor on the heater surface. The vapor not only increases the heat transfer thermal resistance between the solid and the fluid but not creates a vortex near the bubble. This is not conducive to the movement of the bubble to the middle of the heater. Thus it slows down the heat mass exchange between the hot fluid on the heating surface and the colder fluid on both sides. As a result, the improved percentage of CHF decreases gradually with the increase in the heater length. For hydrophobic surfaces, the increased percentage of CHF also increases and then decreases with heater length. However, compared with the hydrophilic surfaces, the length of the heater source increases corresponding to the beginning of decreasing critical heat flux.

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Current bifurcation, reversals and multiple mobility transitions of dipole in alternating electric fields

Cited by 3 publications

References 35 publications

Symmetric Brownian motor subjected to Lévy noise

Symmetric Brownian motor subjected to Lévy noise

Control of diffusion and transition phenomena in a periodic system with temporal symmetry breaking

Mesoscopic study on effect of electric field and heater characteristics on saturated pool boiling heat transfer

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