Article
Mechanics
Hang-Yu Zhu, Chong Pan, Huan Lian
Summary: This study investigates the dependence of multi-scale droplet settling behavior on characteristic parameters of two-phase turbulent flow through sophisticated conditional analysis. The results show that there is a negative correlation between local particle concentration and settling velocity in the moderate-concentration range, while a positive correlation exists in the high-concentration range. Such a process is consistent with the so-called multi-scale preferential sweeping effect.
Article
Mechanics
B. Hervieu, A. Besq, J. R. Angilella
Summary: The residence time distribution of tiny particles in flows is mainly affected by flow characteristics and can differ significantly from that of fluid particles when particles have a finite response time. This study focuses on shear and extensional flows and investigates their impact on polydisperse suspensions of weakly inertial particles. The theoretical results are validated by numerical simulations.
Article
Chemistry, Multidisciplinary
Lian Duan, Zhixun Xia, Binbin Chen, Likun Ma, Yunchao Feng, Jiarui Zhang, Jianxin Hu
Summary: This study aims to develop a numerical model that accurately describes the ignition of boron agglomerates. Based on the single-particle ignition model proposed by the group of Kuo, the model introduces Thiele modulus and effectiveness factor to represent the diffusion resistance of reaction gases in the pores of boron agglomerates. Through comparison with experimental data, the ignition time results of the model show reasonable consistency. The established model can be further used to investigate the ignition mechanisms and characteristics of boron agglomerates.
Article
Materials Science, Multidisciplinary
Hongmei Liu, Wei Jiang, Wenming Liu, Xuedong Liu, Shuyuan Liu, Tat Leung Chan
Summary: A novel Monte Carlo method is proposed to improve the computational accuracy and efficiency by using a deterministic method for deposition events and adopting the operator splitting method to couple stochastic and deterministic processes. The method is verified against analytical solutions and experimental results, showing significant improvement in both computational accuracy and efficiency compared to the original DWMC method.
Article
Environmental Sciences
Naser G. A. Mahfouz, Neil M. Donahue
Summary: The study revealed that the limit of the enhancement of coagulation scavenging of charged particles is 2, which results in a dramatic drop in survival probability when the coagulation sink is doubled. Therefore, it is crucial to take this counterbalancing effect into consideration when studying ion-induced new-particle formation and ion-enhanced new-particle growth in the atmosphere.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Physics, Fluids & Plasmas
Ben Schubert, Noah S. Molinski, Ingo von Borstel, Thilo Glissmann, Daniyar Balapanov, Andrei Vedernikov, Juergen Blum
Summary: By analyzing the translational and rotational Brownian motion of micrometer-sized silica spheres aggregates, this study determined the mass, translational response time, moment of inertia, and rotational response time for each individual dust aggregate. A positive correlation between mass and response time was found, consistent with aggregate structures with low fractal dimensions. The fractal dimension of the aggregate ensemble was determined using the mass and moment of inertia. Slight deviations from pure Gaussian one-dimensional displacement statistics were observed in the ballistic limit for both translational and rotational Brownian motion.
Article
Mechanics
Sheng Chen, Pinzhuo Chen, Jianhong Fu
Summary: This study uses particle-resolved direct numerical simulation to calculate the drag and lift forces on linear and irregular agglomerates formed by nano- and micrometer particles. Explicit expressions for the drag and lift coefficients are proposed, and the influence of agglomerate shape on the lift coefficient distribution is revealed.
Article
Crystallography
C. Ravikumar
Summary: Coprecipitation is a simple, fast, and inexpensive method for preparing metal oxide nanoparticles. However, it often leads to the formation of nanoparticles with a broad size distribution. This study investigates the formation mechanism of polydispersed iron oxide magnetite nanoparticles using this method and proposes a mechanism based on the time scales of different particle formation events.
JOURNAL OF CRYSTAL GROWTH
(2023)
Article
Geology
Thomas Giachetti, Kathleen R. Trafton, Joshua Wiejaczka, James E. Gardner, James M. Watkins, Thomas Shea, Heather M. N. Wright
Summary: New textural observations of pumice aggregates during volcanic eruptions suggest that some primary products of magma fragmentation can survive by sintering together, providing insights into the potential energy of fragmentation.
Article
Mechanics
Narges Mohammad Mehdipour, Naveen Reddy, Roman J. Shor, Giovanniantonio Natale
Summary: Small-angle light scattering is used to study the microstructural changes of polydisperse colloidal suspensions under capillary flow. The effects of shape anisotropy are explored by suspending titanium dioxide bundles and kaolinite nanoclay stacks in a Newtonian fluid. The study reveals significant changes in particle orientation angle due to shear rate gradient, but no cross-sectional flow migration was observed. The experiment shows two stages of transition: initial particle alignment and subsequent orientational demixing. These findings provide insights into the flow-microstructure relationship of polydisperse colloidal suspensions for industrial processing optimization.
Article
Mechanics
Hangyu Zhu, Chong Pan, Huan Lian
Summary: The motions of polydisperse droplets in homogeneous and isotropic turbulence were investigated at Reynolds numbers Re-lambda = 200-300. The emphasis was placed on the parameter dependencies of spatial velocity correlations (SVCs) and relative velocities (RVs) of droplets. It was found that the droplet SVCs and RVs exhibited different behaviors compared to turbulence at different scales, and were influenced by the Stokes number and settling parameter.
Article
Chemistry, Analytical
Georgios A. Kelesidis, Daniel Gao, Fabian H. L. Starsich, Sotiris E. Pratsinis
Summary: Plasmon rulers are used to relate the shift in resonance wavelength of gold agglomerates to the average distance between their constituent nanoparticles. They are essential for accurately monitoring the dynamics of biomolecules. A new plasmon ruler for gold nanoagglomerates has been derived that enables the accurate determination of sub-10 nm coating thicknesses.
ANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Chemical
Kun Shi, Mingming He, Li Zhang, Bidan Zhao, Junwu Wang
Summary: This study evaluates the suitability of six species kinetic theories in modeling simple shear flow. The results show that only two theories can qualitatively capture the effects of different parameters on the granular temperature ratio and stresses, and one of them has more accurate predictions, while the other theory matches the normal and shear stresses with experimental data better.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Mechanics
Metin Zeybek, Holger Grosshans
Summary: In this study, an Eulerian formulation for triboelectric charging of powder flows is proposed, able to fully account for polydisperse particle size distributions. The approach involves solving the particle size, velocity, and charge distribution function through a direct quadrature method of moments, considering electrostatic charge uptake by particles when contacting a solid wall and charge exchange between particles during collisions. The method can predict the effect of particle size variations, initial velocity distribution, and charge diffusion coefficient on particle dynamics and charging of the flow.
Article
Engineering, Chemical
Mengxiao Yu, Houjun Zhang, Junheng Guo, Jinli Zhang, You Han
Summary: This study utilized the DEM method to investigate the flow behavior of polydisperse particles in a rolling mode rotating drum. By studying particle parameters in different regions, suggestions for improving performance were presented. Difference in flow behavior between polydisperse and monodisperse particles was also highlighted for industrial applications of complex particle systems.
Article
Chemistry, Physical
Huan Yang, Eirini Goudeli, Christopher J. Hogan
JOURNAL OF CHEMICAL PHYSICS
(2018)
Review
Biotechnology & Applied Microbiology
Eirini Goudeli
CURRENT OPINION IN CHEMICAL ENGINEERING
(2019)
Article
Chemistry, Multidisciplinary
Shuaijun Pan, Rui Guo, Nadja Bertleff-Zieschang, Shanshan Li, Quinn A. Besford, Qi-Zhi Zhong, Gyeongwon Yun, Yunti Zhang, Francesca Cavalieri, Yi Ju, Eirini Goudeli, Joseph J. Richardson, Frank Caruso
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Engineering, Chemical
Eirini Goudeli, Jihyeon Lee, Christopher J. Hogan
JOURNAL OF AEROSOL SCIENCE
(2020)
Article
Engineering, Chemical
Maximilian L. Eggersdorfer, Eirini Goudeli
Article
Thermodynamics
Georgios A. Kelesidis, Eirini Goudeli
Summary: The study investigates the growth mechanism of agglomerates formed by soot and silica primary particles in flame reactors and combustion engines. Results show that the broad agglomerate size distributions of soot and silica formed in the free molecular regime narrow by coagulation in the transition regime. The collision rate of both soot and silica agglomerates is significantly higher in the transition regime compared to monodisperse agglomerates.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Chemistry, Multidisciplinary
Shuaijun Pan, Eirini Goudeli, Jingqu Chen, Zhixing Lin, Qi-Zhi Zhong, Wenjie Zhang, Haitao Yu, Rui Guo, Joseph J. Richardson, Frank Caruso
Summary: Supramolecular complexation is a powerful strategy for engineering materials in bulk and at interfaces, with metal-phenolic networks (MPNs) emerging as suitable candidates for surface and particle engineering due to their diverse properties. Changes in the local supramolecular network during thermal transformation processes enable the engineering of metal-oxide networks (MONs) and metal-carbon networks with different properties. By integrating photo-responsive motifs and silanization, the MONs achieve reversible superhydrophobic and superhydrophilic properties, offering a versatile pathway for advanced materials engineering.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Akaash Sharma, Khaled Mosharraf Mukut, Somesh P. Roy, Eirini Goudeli
Summary: Reactive molecular dynamics simulations were used to investigate the coalescence of incipient soot clusters. The structure and composition of the formed soot clusters were quantified, and the characteristic coalescence time was tracked at different temperatures. This approach provides significant insight into soot formation and growth mechanisms, facilitating a better understanding and control of soot in combustion processes.
Article
Multidisciplinary Sciences
Nick A. Shepelin, Peter C. Sherrell, Emmanuel N. Skountzos, Eirini Goudeli, Jizhen Zhang, Vanessa C. Lussini, Beenish Imtiaz, Ken Aldren S. Usman, Greg W. Dicinoski, Joseph G. Shapter, Joselito M. Razal, Amanda Ellis
Summary: The study reveals a previously unseen polarization locking phenomenon of PVDF-TrFE driven by strong electrostatic interactions around 2D materials, leading to exceptional piezoelectric performance without the need for external energy input. This provides a new fundamental and low-energy input mechanism for poling fluoropolymers, enabling advancements in electromechanical technologies.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Chemical
Moataz Ali El-Okazy, Liang Liu, Mohamed H. Abdellah, Eirini Goudeli, Sandra E. Kentish
Summary: This study investigates the sorption properties of a range of pure gases in amorphous glassy perfluoropolymers and calculates the diffusivity and activation energy using transport models. The results show that the CyclAFlor (TM) copolymer has superior performance for gas separation applications.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Rui Guo, Eirini Goudeli, Wanjun Xu, Joseph J. Richardson, Weijian Xu, Shuaijun Pan
Summary: The ability to effectively bind fluorinated motifs to various substrates using cyanoacrylate glue is computationally and experimentally evaluated. The composite coatings show ultralow surface energy and strong surface adhesion, allowing for the generation of super-repellent coatings. These coatings exhibit super-repellency to corrosive liquids and ultralow surface tension liquids, with tunable resistance to liquid penetration. They also demonstrate effective cargo loading and robust self-cleaning properties.
Article
Chemistry, Physical
Chan-Jin Kim, Francesca Ercole, Eirini Goudeli, Sukhvir Kaur Bhangu, Jingqu Chen, Matthew Faria, John F. Quinn, Frank Caruso
Summary: In this study, the synthesis and assembly of catechol-functionalized DNA block copolymers with metal ions (e.g., FeIII) were used to prepare DNA-functionalized particles and capsules with different sizes and a narrow size distribution. The resulting capsules showed stability under various conditions and tunable permeability through the molecular recognition properties of DNA strands. The DNA-functionalized particles exhibited efficient cellular uptake and endosomal escape capability, making them suitable for gene silencing applications.
CHEMISTRY OF MATERIALS
(2022)
Article
Computer Science, Interdisciplinary Applications
Khaled Mosharraf Mukut, Somesh Roy, Eirini Goudeli
Summary: This paper presents a novel post-processing utility called MAFIA-MD for analyzing and characterizing molecules in reactive molecular dynamics (RMD) simulations. The utility can analyze a large number of RMD trajectory files simultaneously and provides statistical analysis and chemical characterization of the trajectories. It also includes a methodology for validating RMD simulations using High-Resolution Transmission Electron Microscopy (HRTEM) images. The utility allows for easy operation through a graphical user interface (GUI).
COMPUTER PHYSICS COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Bingxin Liu, Hadi Ranji-Burachaloo, Paul A. Gurr, Eirini Goudeli, Greg G. Qiao
JOURNAL OF MATERIALS CHEMISTRY C
(2019)
Article
Chemistry, Multidisciplinary
Nick A. Shepelin, Peter C. Sherrell, Eirini Goudeli, Emmanuel N. Skountzos, Vanessa C. Lussini, Greg W. Dicinoski, Joseph G. Shapter, Amanda Ellis
ENERGY & ENVIRONMENTAL SCIENCE
(2020)