Physical review. E最新文献_第9页

Spatial dependence of microscopic percolation conduction 微观渗滤传导的空间依赖性

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2024-08-06 DOI: 10.1103/physreve.110.024112

Matthew Golden, Joseph P. Straley

引用次数: 0

Contact angle hysteresis on nonwetting microstructured surfaces: Effect of randomly distributed pillars or holes 非润湿微结构表面上的接触角滞后：随机分布的柱或孔的影响

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2024-08-06 DOI: 10.1103/physreve.110.024801

Pavel Iliev, Nina Pesheva, Stanimir Iliev

{"title":"Contact angle hysteresis on nonwetting microstructured surfaces: Effect of randomly distributed pillars or holes","authors":"Pavel Iliev, Nina Pesheva, Stanimir Iliev","doi":"10.1103/physreve.110.024801","DOIUrl":"https://doi.org/10.1103/physreve.110.024801","url":null,"abstract":"We present a numerical study of the advancing and receding apparent contact angles for a liquid meniscus in contact with an ultrahydrophobic surface with randomly distributed microsized pillars or holes in the Cassie's wetting regime. We study the Wilhelmy plate system in the framework of the full capillary model to obtain these angles using the heterogeneous surface approximation model for a broad interval of values of pillar or hole concentration and for both square and circular shapes of the pillars or holes cross-section. Three types of random placing of defects on the plate are investigated, i.e., two with restrictions: (1) with maximum and (2) with minimum distance between the defects (in these cases the defects are isolated), and (3) without restrictions (the defects can overlap). The results show that the type of defect distribution and also the type of the defects shape (circular or square) does not affect the magnitude of the two angles. The results of the numerical simulations showed that the retention force for a plate with randomly located defects is not greater, and for larger concentrations of pillars or holes, it is smaller than that for periodically spaced ones. Comparisons with experimental results for the receding contact angle on surfaces with pillars and with the advancing contact angle on surfaces with periodically arranged holes is carried out.","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141938800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Past rewinding of fluid dynamics from noisy observation via physics-informed neural computing 通过物理信息神经计算，从噪声观测中回溯流体动力学的过去

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2024-08-06 DOI: 10.1103/physreve.110.025302

Jaemin Seo

{"title":"Past rewinding of fluid dynamics from noisy observation via physics-informed neural computing","authors":"Jaemin Seo","doi":"10.1103/physreve.110.025302","DOIUrl":"https://doi.org/10.1103/physreve.110.025302","url":null,"abstract":"Reconstructing the past of observed fluids has been known as an ill-posed problem due to both numerical and physical challenges, especially when observations are distorted by inevitable noise, resolution limits, or unknown factors. When employing traditional differencing schemes to reconstruct the past, the computation often becomes highly unstable or diverges within a few backward time steps from the distorted and noisy observation. Although several techniques have been recently developed for inverse problems, such as adjoint solvers and supervised learning, they are also unrobust against errors in observation when there is time-reversed simulation. Here we present that by using physics-informed neural computing, robust time-reversed fluid simulation is possible. By seeking a solution that closely satisfies the given physics and observations while allowing for errors, it reconstructs the most probable past from noisy observations. Our work showcases time rewinding in extreme fluid scenarios such as shock, instability, blast, and magnetohydrodynamic vortex. Potentially, this can be applied to trace back the interstellar evolution and determining the origin of fusion plasma instabilities.","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141938890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Continuum percolation of two-dimensional adaptive dynamics systems 二维自适应动力学系统的连续渗流

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2024-08-05 DOI: 10.1103/physreve.110.024111

Chang Liu, Jia-Qi Dong, Lian-Chun Yu, Liang Huang

{"title":"Continuum percolation of two-dimensional adaptive dynamics systems","authors":"Chang Liu, Jia-Qi Dong, Lian-Chun Yu, Liang Huang","doi":"10.1103/physreve.110.024111","DOIUrl":"https://doi.org/10.1103/physreve.110.024111","url":null,"abstract":"The percolation phase transition of a continuum adaptive neuron system with homeostasis is investigated. In order to maintain their average activity at a particular level, each neuron (represented by a disk) varies its connection radius until the sum of overlapping areas with neighboring neurons (representing the overall connection strength in the network) has reached a fixed target area for each neuron. Tuning the two key parameters in the model, i.e., the density defined as the number of neurons (disks) per unit area and the sum of the overlapping area of each disk with its adjacent disks, can drive the system into the critical percolating state. These two parameters are inversely proportional to each other at the critical state, and the critical filling factors are fixed about 0.7157, which is much less than the case of the continuum percolation with uniform disks. It is also confirmed that the critical exponents in this model are the same as the two-dimensional standard lattice percolation. Although the critical state is relatively more sensitive and exhibits long-range spatial correlation, local fluctuations do not propagate in a long-range manner through the system by the adaptive dynamics, which renders the system overall robust against perturbations.","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141938894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantifying nonuniversal corner free-energy contributions in weakly anisotropic two-dimensional critical systems 量化弱各向异性二维临界系统中的非普遍角自由能贡献

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2024-08-05 DOI: 10.1103/physreve.110.024106

Florian Kischel, Stefan Wessel

引用次数: 0

Three-dimensional solidification modeling of various materials using the lattice Boltzmann method with an explicit enthalpy equation 使用带有显式焓方程的晶格玻尔兹曼法建立各种材料的三维凝固模型

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2024-08-05 DOI: 10.1103/physreve.110.025301

Zheng Dai (代铮), Zhongyi Wang (王忠义), Junhao Zhu (朱俊豪), Xiaohu Chen (陈小虎), Qing Li (李庆), Zongrui Jin (金宗睿)

{"title":"Three-dimensional solidification modeling of various materials using the lattice Boltzmann method with an explicit enthalpy equation","authors":"Zheng Dai (代铮), Zhongyi Wang (王忠义), Junhao Zhu (朱俊豪), Xiaohu Chen (陈小虎), Qing Li (李庆), Zongrui Jin (金宗睿)","doi":"10.1103/physreve.110.025301","DOIUrl":"https://doi.org/10.1103/physreve.110.025301","url":null,"abstract":"Based on the mesoscopic scale, the lattice Boltzmann method (LBM) with an enthalpy-based model represented in the form of distribution functions is widely used in the liquid-solid phase transition process of energy storage materials due to its direct and relatively accurate characterization of the presence of latent heat of solidification. However, since the enthalpy distribution function itself contains the physical properties of the material, these properties are transferred along with the enthalpy distribution function during the streaming process. This leads to deviations between the enthalpy-based model when simulating the phase transition process of different materials mixed and the actual process. To address this issue, in this paper, we construct an enthalpy-based model for different types of materials. For multiple materials, various forms of enthalpy distribution functions are employed. This method still uses the form of enthalpy distribution functions for collisions and streaming processes among the same type of substance, while for heat transfer between different materials, it avoids the direct transfer of enthalpy distribution functions and instead applies a source term to the enthalpy distribution functions, characterizing the heat transfer between different materials through the energy change before and after mixing based on the temperature. To verify the accuracy of the method proposed in this paper, a detailed solidification model for two different materials is constructed using the example of water droplets solidifying in air, and the results are compared with experimental outcomes. The results of the simulation show that the model constructed in this paper is largely in line with the actual process.","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141938899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Intermediate-times dilemma for open quantum system: Filtered approximation to the refined weak-coupling limit 开放量子系统的中间时间困境：细化弱耦合极限的过滤近似

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2024-08-05 DOI: 10.1103/physreve.110.024110

Marek Winczewski, Antonio Mandarino, Gerardo Suarez, Robert Alicki, Michał Horodecki

{"title":"Intermediate-times dilemma for open quantum system: Filtered approximation to the refined weak-coupling limit","authors":"Marek Winczewski, Antonio Mandarino, Gerardo Suarez, Robert Alicki, Michał Horodecki","doi":"10.1103/physreve.110.024110","DOIUrl":"https://doi.org/10.1103/physreve.110.024110","url":null,"abstract":"The famous Davies-GKSL secular Markovian master equation is tremendously successful in approximating the evolution of open quantum systems in terms of just a few parameters. However, the fully secular Davies-GKSL equation fails to accurately describe timescales short enough, i.e., comparable to the inverse of differences of frequencies present in the system of interest. A complementary approach that works well for short times but is not suitable after this short interval is known as the quasisecular master equation. Still, both approaches fail to have any faithful dynamics in the intermediate-time interval. Simultaneously, descriptions of dynamics that apply to the aforementioned “gray zone” often are computationally much more complex than master equations or are mathematically not well-structured. The filtered approximation (FA) to the refined weak-coupling limit has the simplistic spirit of the Davies-GKSL equation and allows capturing the dynamics in the intermediate-time regime. At the same time, our non-Markovian equation yields completely positive dynamics. We exemplify the performance of the FA equation in the cases of the spin-boson system and qutrit-boson system in which two distant timescales appear.","PeriodicalId":20085,"journal":{"name":"Physical review. E","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141969092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vibrational lifetimes and viscoelastic properties of ultrastable glasses 超稳定玻璃的振动寿命和粘弹特性

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2024-08-05 DOI: 10.1103/physreve.110.025001

Jan Grießer, Lars Pastewka

引用次数: 0

Dynamical large deviations for long-range interacting inhomogeneous systems without collective effects 无集体效应的长程相互作用非均质系统的动态大偏差

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2024-08-05 DOI: 10.1103/physreve.110.024108

Ouassim Feliachi, Jean-Baptiste Fouvry

引用次数: 0

Entropy production from maximum entropy principle: A unifying approach 从最大熵原理看熵的产生：统一方法

IF 2.4 3区物理与天体物理

Physical review. E Pub Date : 2024-08-05 DOI: 10.1103/physreve.110.024109

Adalberto D. Varizi, Pedro S. Correia

引用次数: 0