arXiv: Soft Condensed Matter最新文献_第2页

Template-Free Preparation of Thermoresponsive Mag-netic Cilia Compatible with Biological Conditions. 与生物条件相容的热响应磁性纤毛的无模板制备。

arXiv: Soft Condensed Matter Pub Date : 2020-11-08 DOI: 10.1021/acs.jpcc.0c09089.s008

Aline Grein-Iankovski, A. Graillot, M. Radiom, W. Loh, J. Berret

引用次数: 0

Supervised Learning in Physical Networks: From Machine Learning to Learning Machines 物理网络中的监督学习:从机器学习到学习机

arXiv: Soft Condensed Matter Pub Date : 2020-11-07 DOI: 10.1103/PhysRevX.11.021045

M. Stern, D. Hexner, J. Rocks, Andrea J. Liu

引用次数: 38

The zero-shear-rate limiting rheological behaviors of ideally conductive particles suspended in concentrated dispersions under an electric field 电场作用下悬浮于集中分散体中的理想导电颗粒的零剪切率极限流变行为

arXiv: Soft Condensed Matter Pub Date : 2020-11-06 DOI: 10.1122/8.0000081

S. Mirfendereski, J. S. Park

{"title":"The zero-shear-rate limiting rheological behaviors of ideally conductive particles suspended in concentrated dispersions under an electric field","authors":"S. Mirfendereski, J. S. Park","doi":"10.1122/8.0000081","DOIUrl":"https://doi.org/10.1122/8.0000081","url":null,"abstract":"The rheological behaviors of suspension of ideally conductive particles in an electric field are studied using large-scale numerical simulations in the limit of zero-shear-rate flow. Under the action of an electric field, the particles undergo the nonlinear electrokinetic phenomenon termed as dipolophoresis, which is the combination of dielectrophoresis and induced-charge electrophoresis. For ideally conductive particles, the dynamics of the suspension are primarily controlled by induced-charge electrophoresis. To characterize the rheological properties of the suspension, the particle stress tensor and particle pressure are calculated in a range of volume fraction up to almost random close packing. The particle normal stress and particle pressure are shown to behave non-monotonically with volume fraction, especially in concentrated regimes. In particular, the particle pressure is positive for volume fraction up to 30%, after which it becomes negative, indicating a change in the nature of the particle pressure. The microstructure expressed by pair distribution function and suspension entropy is also evaluated. Visible variations in the local microstructure seem to correlate with the non-monotonic variation in the particle normal stresses and particle pressure. These non-monotonic behaviors are also correlated with the change in the dominant mechanism of particle pairing dynamics observed in our recent study [Mirfendereski & Park, J. Fluid Mech. textbf{875}, R3 (2019)]. Lastly, the effects of confinement on the particle stress and particle pressure are investigated. It is found that the particle pressure changes its nature very quickly at high volume fractions as the level of confinement increases. This study should motivate control strategies to fully exploit the distinct changing nature of the pressure for rheological manipulation of such suspension system.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"105 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91432725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Maxwell crossover and the van der Waals equation of state 麦克斯韦交叉和范德华状态方程

arXiv: Soft Condensed Matter Pub Date : 2020-10-28 DOI: 10.21203/rs.3.rs-103639/v1

Hongqin Liu

{"title":"The Maxwell crossover and the van der Waals equation of state","authors":"Hongqin Liu","doi":"10.21203/rs.3.rs-103639/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-103639/v1","url":null,"abstract":"\u0000 The well-known Maxwell construction1 (the equal-area rule, EAR) was devised for vapor liquid equilibrium (VLE) calculation with the van der Waals (vdW) equation of state (EoS)2. The EAR generates an intermediate volume between the saturated liquid and vapor volumes. The trajectory of the intermediate volume over the coexistence region is defined here as the Maxwell crossover, denoted as the M-line, which is independent of EoS. For the vdW or any cubic3 EoS, the intermediate volume corresponds to the “unphysical” root, while other two corresponding to the saturated volumes of vapor and liquid phases, respectively. Due to it’s “unphysical” nature, the intermediate volume has always been discarded. Here we show that the M-line, which turns out to be strictly related to the diameter4 of the coexistence curve, holds the key to solving several major issues. Traditionally the coexistence curve with two branches is considered as the extension of the Widom line5,6-9. This assertion causes an inconsistency in three planes of temperature, pressure and volume. It is found that the M-line is the natural extension of the Widom line into the vapor-liquid coexistence region. As a result, the united single line coherently divides the entire phase space, including the coexistence and supercritical fluid regions, into gas-like and liquid-like regimes in all the planes. Moreover, along the M-line the vdW EoS finds a new perspective to access the second-order transition in a way better aligning with observations and modern theory10. Lastly, by using the feature of the M-line, we are able to derive a highly accurate and analytical proximate solution to the VLE problem with the vdW EoS.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90490708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Learning-based approach to plasticity in athermal sheared amorphous packings: Improving softness 基于学习的非热剪切非晶填料塑性研究方法:改善柔软性

arXiv: Soft Condensed Matter Pub Date : 2020-10-27 DOI: 10.1063/5.0035395

J. Rocks, S. Ridout, Andrea J. Liu

{"title":"Learning-based approach to plasticity in athermal sheared amorphous packings: Improving softness","authors":"J. Rocks, S. Ridout, Andrea J. Liu","doi":"10.1063/5.0035395","DOIUrl":"https://doi.org/10.1063/5.0035395","url":null,"abstract":"The plasticity of amorphous solids undergoing shear is characterized by quasi-localized rearrangements of particles. While many models of plasticity exist, the precise relationship between plastic dynamics and the structure of a particle's local environment remains an open question. Previously, machine learning was used to identify a structural predictor of rearrangements, called \"softness.\" Although softness has been shown to predict which particles will rearrange with high accuracy, the method can be difficult to implement in experiments where data is limited and the combinations of descriptors it identifies are often difficult to interpret physically. Here we address both of these weaknesses, presenting two major improvements to the standard softness method. First, we present a natural representation of each particle's observed mobility, allowing for the use of statistical models which are both simpler and provide greater accuracy in limited data sets. Second, we employ persistent homology as a systematic means of identifying simple, topologically-informed, structural quantities that are easy to interpret and measure experimentally. We test our methods on two-dimensional athermal packings of soft spheres under quasi-static shear. We find that the same structural information which predicts small variations in the response is also predictive of where plastic events will localize. We also find that excellent accuracy is achieved in athermal sheared packings using simply a particle's species and the number of nearest neighbor contacts.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"119 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77463550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Morphology of Active Deformable 3D Droplets 活动可变形3D液滴的形态

arXiv: Soft Condensed Matter Pub Date : 2020-10-20 DOI: 10.1103/PHYSREVX.11.021001

Liam J. Ruske, J. Yeomans

引用次数: 17

Inverse Flexoelectret Effect: Bending Dielectrics by a Uniform Electric Field 反向挠性驻极体效应:均匀电场使电介质弯曲

arXiv: Soft Condensed Matter Pub Date : 2020-10-15 DOI: 10.1103/PHYSREVAPPLIED.15.014032

X. Wen, K. Tan, Q. Deng, S. Shen

引用次数: 7

Effect of transport mechanism on the coarsening of bicontinuous structures: A comparison between bulk and surface diffusion 输运机制对双连续结构粗化的影响:体扩散与表面扩散的比较

arXiv: Soft Condensed Matter Pub Date : 2020-10-14 DOI: 10.1103/physrevmaterials.4.103401

W. Andrews, K. Elder, P. Voorhees, K. Thornton

{"title":"Effect of transport mechanism on the coarsening of bicontinuous structures: A comparison between bulk and surface diffusion","authors":"W. Andrews, K. Elder, P. Voorhees, K. Thornton","doi":"10.1103/physrevmaterials.4.103401","DOIUrl":"https://doi.org/10.1103/physrevmaterials.4.103401","url":null,"abstract":"Coarsening of bicontinuous microstructures is observed in a variety of systems, such as nanoporous metals and mixtures that have undergone spinodal decomposition. To better understand the morphological evolution of these structures during coarsening, we compare the morphologies resulting from two different coarsening mechanisms, surface and bulk diffusion. We perform phase-field simulations of coarsening via each mechanism in a two-phase mixture at nominal volume fractions of 50%-50% and 36%-64%, and the simulated structures are characterized in terms of topology (genus density), the interfacial shape distribution, structure factor, and autocorrelations of phase and mean curvature. We observe self-similar evolution of morphology and topology and agreement with the expected power laws for dynamic scaling, in which the characteristic length scale increases over time proportionally to $t^{1/4}$ for surface diffusion and $t^{1/3}$ for bulk diffusion. While we observe the expected difference in the coarsening kinetics, we find that differences in self-similar morphology due to coarsening mechanism are relatively small, although typically they are larger at 36% volume fraction than at 50% volume fraction. In particular, we find that bicontinuous structures coarsened via surface diffusion have lower scaled genus densities than structures coarsened via bulk diffusion. We also compare the self-similar morphologies to those in literature and to two model bicontinuous structures, namely, constant-mean-curvature surfaces based on the Schoen G minimal surface and random leveled-wave structures. The average scaled mean curvatures of these model structures agree reasonably with those of the coarsened structures at both 36% and 50%, but we find substantial disagreements in the scaled genus densities and the standard deviations of mean curvature.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75579307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A full-chain tube-based constitutive model for living linear polymers 活体线性聚合物的全链管本构模型

arXiv: Soft Condensed Matter Pub Date : 2020-10-13 DOI: 10.1122/8.0000114

J. Peterson, M. Cates

引用次数: 12

Navier–Stokes transport coefficients for a model of a confined quasi-two-dimensional granular binary mixture 受限准二维颗粒二元混合物模型的Navier-Stokes输运系数

arXiv: Soft Condensed Matter Pub Date : 2020-10-12 DOI: 10.1063/5.0032919

V. Garz'o, R. Brito, R. Soto

{"title":"Navier–Stokes transport coefficients for a model of a confined quasi-two-dimensional granular binary mixture","authors":"V. Garz'o, R. Brito, R. Soto","doi":"10.1063/5.0032919","DOIUrl":"https://doi.org/10.1063/5.0032919","url":null,"abstract":"The Navier--Stokes transport coefficients for a model of a confined quasi-two-dimensional granular binary mixture of inelastic hard spheres are determined from the Boltzmann kinetic equation. A normal or hydrodynamic solution to the Boltzmann equation is obtained via the Chapman--Enskog method for states near the local version of the homogeneous time-dependent state. The mass, momentum, and heat fluxes are determined to first order in the spatial gradients of the hydrodynamic fields, and the associated transport coefficients are identified. As expected, they are given in terms of the solutions of a set of coupled linear integral equations. In addition, in contrast to previous results obtained for low-density granular mixtures, there are also nonzero contributions to the first-order approximations to the partial temperatures $T_i^{(1)}$ and the cooling rate $zeta^{(1)}$. Explicit forms for the diffusion transport coefficients, the shear viscosity coefficient, and the quantities $T_i^{(1)}$ and $zeta^{(1)}$ are obtained by assuming the steady-state conditions and by considering the leading terms in a Sonine polynomial expansion. The above transport coefficients are given in terms of the coefficients of restitution, concentration, and the masses and diameters of the components of the mixture. The results apply in principle for arbitrary degree of inelasticity and are not limited to specific values of concentration, mass and/or size ratios. As a simple application of these results, the violation of the Onsager reciprocal relations for a confined granular mixture is quantified in terms of the parameter space of the problem.","PeriodicalId":8472,"journal":{"name":"arXiv: Soft Condensed Matter","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72901603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5