Physical Review E最新文献_第5页

Dynamical analysis of a parameter-aware reservoir computer. 参数感知水库计算机的动态分析。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-09-01 DOI: 10.1103/PhysRevE.110.034211

Dishant Sisodia, Sarika Jalan

引用次数: 0

Interplay between endothelial glycocalyx layer and red blood cell in microvascular blood flow: A numerical study. 微血管血流中内皮糖萼层与红细胞之间的相互作用：数值研究

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-09-01 DOI: 10.1103/PhysRevE.110.034409

Keqin Han, Shuhao Ma, Shuo Wang, Xiaojing Qi, Xin Bian, Xuejin Li

{"title":"Interplay between endothelial glycocalyx layer and red blood cell in microvascular blood flow: A numerical study.","authors":"Keqin Han, Shuhao Ma, Shuo Wang, Xiaojing Qi, Xin Bian, Xuejin Li","doi":"10.1103/PhysRevE.110.034409","DOIUrl":"https://doi.org/10.1103/PhysRevE.110.034409","url":null,"abstract":"The endothelial glycocalyx layer (EGL) plays a crucial role in regulating blood flow in microvessels. Experimental evidence suggests that there is greater blood flow resistance in vivo compared to in vitro, partially due to the presence of the EGL. However, the complex relationship between EGL deformation and blood cell behavior in shear flow and its quantification remains incompletely understood. To address this gap, we employ a particle-based numerical simulation technique to examine the interaction of the EGL with flowing red blood cells (RBCs) in microtubes. We examine changes in EGL deformation in response to variations in shear rate, EGL graft density, and contour height. Our results indicate that the alterations in EGL height are influenced by the mechanical properties of the EGL, flow conditions, and the RBC-EGL interaction. The flowing RBC compresses the EGL, causing a notable reduction in EGL height near the RBC flow. Additionally, we find that the presence of the EGL in the microtube results in increased RBC deformation and a wider gap between the RBC and tube wall due to spatial occupancy. The significant impact of the EGL on RBC flow is particularly evident in microtubes with diameters ranging from 7 to 10µm, a range consistent with notable differences in vascular flow resistance observed between in vivo and in vitro experiments. The simulation results shed insight on the dynamic interplay between RBC and the EGL in microvascular blood flow.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142478226","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

Two-temperature thermochemical nonequilibrium model based on the coarse-grained treatment of molecular vibrational states. 基于分子振动状态粗粒度处理的双温热化学非平衡模型。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-09-01 DOI: 10.1103/PhysRevE.110.035107

Jiaqi Lv, Qizhen Hong, Xiaoyong Wang, Yifeng Huang, Quanhua Sun

{"title":"Two-temperature thermochemical nonequilibrium model based on the coarse-grained treatment of molecular vibrational states.","authors":"Jiaqi Lv, Qizhen Hong, Xiaoyong Wang, Yifeng Huang, Quanhua Sun","doi":"10.1103/PhysRevE.110.035107","DOIUrl":"https://doi.org/10.1103/PhysRevE.110.035107","url":null,"abstract":"Although the high-fidelity state-to-state (StS) model accurately describes high-temperature thermochemical nonequilibrium flows, its practical application is hindered by the prohibitively high computational cost. In this paper, we develop a reduced-order model that leverages the widely used two-temperature (2T) framework and a coarse-grained treatment of molecular vibrational states to achieve accuracy comparable to the StS model while ensuring computational efficiency. We observe that the multigroup coarse-grained model (CGM), lumping vibrational energy levels into several groups, yields results close to the StS model for the high-temperature postshock oxygen flows, even using only two groups. However, the one-group CGM (CGM-1G), equivalent to the 2T model but using the StS kinetics, fails to approximate the StS results. Analysis of microscopic group properties reveals that the failure of the CGM-1G stems from the inability to capture the non-Boltzmann effects of mid-to-high vibrational levels, overestimating apparent dissociation rates and vibrational energy loss in the dissociation-dominated region. We then propose an analytical distribution function of vibrational groups by incorporating Treanor-like terms and an additional linear term (addressing the dissociation depletion of high-lying levels). Building upon this algebraic group distribution function and reconstructing vibrational levels within each group using the vibrational temperature, we develop a new 2T model called CG2T, which demonstrates accuracy much closer (than the CGM-1G) to the StS results for the postshock oxygen flows with varying degrees of thermochemical nonequilibrium. Moreover, a fullyconnected neural network is pretrained to substitute the module for the mass and vibrational energy source terms to enhance computational efficiency, achieving about 30-fold speedup in the CG2T model without sacrificing accuracy.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142478261","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

Record statistics of fracture in the random spring network model. 随机弹簧网络模型中的断裂记录统计。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-09-01 DOI: 10.1103/PhysRevE.110.035004

Subrat Senapati, Subhadeep Roy, Anuradha Banerjee, R Rajesh

{"title":"Record statistics of fracture in the random spring network model.","authors":"Subrat Senapati, Subhadeep Roy, Anuradha Banerjee, R Rajesh","doi":"10.1103/PhysRevE.110.035004","DOIUrl":"https://doi.org/10.1103/PhysRevE.110.035004","url":null,"abstract":"We study the role of record statistics of damage avalanches in predicting the fracture of a heterogeneous material under tensile loading. The material is modeled using a two-dimensional random spring network where disorder is introduced through randomness in the breakage threshold strains of the springs. It is shown that the waiting strain interval between successive records of avalanches has a maximum for moderate disorder, thus showing an acceleration in occurrence of records when approaching final fracture. Such a signature is absent for low disorder when the fracture is nucleation-dominated, as well as for high disorder when the fracture is percolation type. We examine the correlation between the record with the maximum waiting strain interval and the crossover record at which the avalanche statistics change from off-critical to critical. Compared to the avalanche exponent crossover based prediction for failure, we show that the record statistics have the advantage of both being real-time as well as being a precursor significantly prior to final fracture. We also find that in the avalanche-dominated regime, the failure strain is at best weakly correlated with the strain at the maximum waiting strain interval. A stronger correlation is observed between the index of the largest record and the index of the record at the maximum waiting strain interval.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142478259","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

Dynamics and kinetic theory of hard spheres under strong confinement. 强约束下硬球的动力学和动力学理论。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-09-01 DOI: 10.1103/PhysRevE.110.034127

J Javier Brey, M I García de Soria, P Maynar

{"title":"Dynamics and kinetic theory of hard spheres under strong confinement.","authors":"J Javier Brey, M I García de Soria, P Maynar","doi":"10.1103/PhysRevE.110.034127","DOIUrl":"https://doi.org/10.1103/PhysRevE.110.034127","url":null,"abstract":"The kinetic theory description of a low-density gas of hard spheres or disks, confined between two parallel plates separated at a distance smaller than twice the diameter of the particles, is addressed starting from the Liouville equation of the system. The associated Bogoliubov, Born, Green, Kirkwood, and Yvon hierarchy of equations for the reduced distribution functions is expanded in powers of a parameter measuring the density of the system in the appropriate dimensionless units. The Boltzmann level of description is obtained by keeping only the two lowest orders in the parameter. In particular, the one-particle distribution function obeys a couple of equations. Contrary to what happens with a Boltzmann-like kinetic equation that has been proposed for the same system on a heuristic basis, the kinetic theory formulated here admits stationary solutions that are consistent with equilibrium statistical mechanics, in both the absence and presence of external fields. In the latter case, the density profile is rather complex due to the coupling between the inhomogeneities generated by the confinement and by the external fields. The general theory formulated provides a solid basis for the study of the properties of strongly confined dilute gases.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142478162","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

Finite-size scaling of the Kuramoto model at criticality. 临界状态下仓本模型的有限尺寸缩放。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-09-01 DOI: 10.1103/PhysRevE.110.034216

Su-Chan Park, Hyunggyu Park

引用次数: 0

Nascent RNA kinetics with complex promoter architecture: Analytic results and parameter inference. 具有复杂启动子结构的 Nascent RNA 动力学：分析结果和参数推断

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-09-01 DOI: 10.1103/PhysRevE.110.034413

Changhong Shi, Xiyan Yang, Tianshou Zhou, Jiajun Zhang

引用次数: 0

Surface-directed dynamics in living liquid crystals. 活液晶中的表面定向动力学

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-09-01 DOI: 10.1103/PhysRevE.110.034701

Aditya Vats, Varsha Banerjee, Sanjay Puri

引用次数: 0

Nonequilibrium dynamics of coupled oscillators under the shear-velocity boundary condition. 剪切速度边界条件下耦合振荡器的非平衡动力学。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-09-01 DOI: 10.1103/PhysRevE.110.034124

Hidetsugu Sakaguchi

引用次数: 0

Dynamic magnetic characteristics of the kinetic Ising model under the influence of randomness. 随机性影响下动力学伊辛模型的动态磁特性。

IF 2.2 3区物理与天体物理

Physical Review E Pub Date : 2024-09-01 DOI: 10.1103/PhysRevE.110.034134

Bo-Chen Li, Wei Wang

{"title":"Dynamic magnetic characteristics of the kinetic Ising model under the influence of randomness.","authors":"Bo-Chen Li, Wei Wang","doi":"10.1103/PhysRevE.110.034134","DOIUrl":"https://doi.org/10.1103/PhysRevE.110.034134","url":null,"abstract":"In this paper, we propose to solve the issues of long-range or next-neighbor interactions by introducing randomness. This approach is applied to the square lattice Ising model. The Monte Carlo method with the Metropolis algorithm is utilized to calculate the critical temperature T_{C}^{*} under equilibrium thermodynamic phase transition conditions and to investigate the characterization of randomness in terms of magnetization. In order to further characterize the effect of this randomness on the magnetic system, clustering coefficients C_{p} are introduced. Furthermore, we investigate a number of dynamic magnetic behaviors, including dynamic hysteresis behaviors and metamagnetic anomalies. The results indicate that noise has the effect of destabilizing the system and promoting the dynamic phase transition. When the system is subjected to noise, the effect of this noise can be mitigated by the addition of a time-oscillating magnetic field. Finally, the evolution of anomalous metamagnetic fluctuations under the influence of white noise is examined. The relationship between the bias field corresponding to the peak of the curve h_{b}^{peak} and the noise parameter σ satisfies the exponential growth equation, which is consistent with other results.","PeriodicalId":48698,"journal":{"name":"Physical Review E","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142478152","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