Journal of Aerosol Science最新文献

{"title":"Simulation and experimental verification of multi-process aerosol dynamics evolution in the wet flue gas cooling towers under crosswind conditions using FVM-TEMOM","authors":"Ming-Ze Sun,&nbsp;Hong-Wei Li,&nbsp;Ji-Ning Sun","doi":"10.1016/j.jaerosci.2025.106740","DOIUrl":"10.1016/j.jaerosci.2025.106740","url":null,"abstract":"<div><div>The aerosol dynamics in wet flue-gas cooling towers under crosswind conditions are highly complex. Traditional models are inadequate for accurately predicting aerosol dynamics of solid particles under high humidity and turbulent conditions. In this study, an aerosol dynamics model was established by combining the Finite Volume Method (FVM) with the Taylor Expansion Method of Moments (TEMOM). The effects of condensation, coagulation, and fragmentation on the geometric mean diameter (GMD) and particle number concentration (PNC) under different Beaufort wind scales (Bft) were investigated, and the aerosol variations during the growth, transport, and deposition were revealed. The results showed that during aerosol growth, the dominant dynamic process shifted from condensation to coagulation as Bft increased from 2 to 5. Under low Bft (2–3), 22 %–58 % of the outlet area was compressed by upper leeward-side vortices, whereas high Bft (4–5) suppressed these vortices and promoted coagulation in the leeward side. During aerosol transport, the upward motion was sustained by the outward-rotating vortex pairs. Aerosols were driven into translation and rotation by large-scale vortices under low Bft, and fragmentation was enhanced by small-scale vortices under high Bft. During aerosol deposition, inward-rotating vortex pairs were decomposed into small-scale turbulent vortices, thereby expanding the deposition width by a factor of 2.17. Aerosols entrained by the penetrating flow at the tower bottom were deposited in the near field, while aerosols from higher altitudes were carried by the descending airflow and deposited in the far field. The findings provided a basis for accurately predicting aerosol dispersion and deposition.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"192 ","pages":"Article 106740"},"PeriodicalIF":2.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Not all boxes are equal: Investigation of parameters affecting PM2.5 particle removal by the Corsi-Rosenthal box","authors":"Antonio Baratta,&nbsp;Taewon T. Han,&nbsp;Gediminas Mainelis","doi":"10.1016/j.jaerosci.2025.106731","DOIUrl":"10.1016/j.jaerosci.2025.106731","url":null,"abstract":"<div><div>The Corsi-Rosenthal (C-R) box has gained widespread popularity as an affordable, do-it-yourself air cleaner designed to improve indoor air quality. Despite its rapid adoption, limited studies have evaluated how different operational and experimental variables affect the C-R box's efficiency. This study investigated the Clean Air Delivery Rate (CADR) of the C-R box as a function of filter rating, its electret enhancement, measurement interval, location, and type of measurement devices, and additional air mixing when removing PM_2.5 sodium chloride (NaCl) or Arizona Road Dust (ARD) particles in a 3024 ft³ (∼86 m³) room. Based on measurements by a research-grade MiniWRAS (1371, DURAG Group, Hamburg, Germany), the C-R box with four 2-inch MERV-13 filters achieved a CADR of 358.56 ± 10.58 cubic feet per minute (cfm) at its highest fan speed, outperforming MERV-8 filters (209.93 ± 9.30 cfm) by 71 % despite only a 41 % increase in filter cost. MERV-13 filters with an electret designation did not improve CADR compared to plain MERV-13 filters. When challenged with ARD particles, the C-R box achieved a CADR of 416.60 ± 8.31 cfm: 15 % higher compared to NaCl particles. We also observed that moving the C-R box farther away from the measurement devices (140 inches vs 65 inches) led to a decrease in CADR by ∼8 %. However, using additional mixing fans helped improve CADR in the room's corners by up to 21 %. Comparison of CADR determined by an out-of-the-box consumer-grade AirVisual monitor with MiniWRAS showed that the AirVisual yielded the same trends, albeit at a ∼14 % higher CADR. Our investigation of variables affecting the measured C-R box's CADR will help optimize its performance and improve data comparison across studies. We also demonstrate that consumer-grade monitors are a viable option in investigating the performance of air cleaners, especially their localized performance.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"192 ","pages":"Article 106731"},"PeriodicalIF":2.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145705449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of equivalence ratio on soot emissions from turbofan combustor during takeoff and ground idle status","authors":"Guangze Li ,&nbsp;Zhenzhong Zhang ,&nbsp;Liuyong Chang ,&nbsp;Ragui Karim ,&nbsp;Yiwei Zhao ,&nbsp;Boxuan Cui ,&nbsp;Longfei Chen ,&nbsp;Ye Kang ,&nbsp;Lei He","doi":"10.1016/j.jaerosci.2025.106736","DOIUrl":"10.1016/j.jaerosci.2025.106736","url":null,"abstract":"<div><div>Aviation-emitted soot particles have a significant impact on the global radiation balance and climate change. The emission of these particles around airports poses a serious health risk to surrounding residents. This risk is particularly accentuated when aircraft engines are operating at ground idle and takeoff status during which soot particle emissions are substantially elevated. Consequently, the importance of researching aviation soot particle emissions becomes increasingly evident. The present study investigates the center-staged lean-burn low-emission combustor of a commercial turbofan engine. The impacts of varying different equivalence ratios on the nanostructure, micro-morphology of soot particles during the engine ground idle and takeoff status were analyzed with a combined micro/macro characterization technique. The results indicate that during takeoff conditions, a higher equivalence ratio results in increased graphitization degree of soot particles and fringe length, as well as decreased fringe tortuosity, amorphous carbon content, and oxidation. An increase in the equivalence ratio results in the opposite trends under the ground idle condition. The soot particles during ground idle exhibit lower graphitization compared to takeoff, with the proportion of fringe lengths below 1.5 nm decreasing by approximately 4 %. In contrast, the proportion of fringe tortuosity above 1.5 increases by 6 %. Additionally, the average particle number concentration increases dramatically, rising from 1.9E4 #/cm³ to 1.1E7 #/cm³. This study provides essential data for optimizing the design of aviation engine combustors and mitigating soot emissions, offering significant implications for improving environmental quality in airport areas.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"192 ","pages":"Article 106736"},"PeriodicalIF":2.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of turbulent particle dispersion in the respiratory airway using a hybrid RANS-LES model","authors":"Patrick Warfield-McAlpine ,&nbsp;David F. Fletcher ,&nbsp;Kiao Inthavong","doi":"10.1016/j.jaerosci.2025.106735","DOIUrl":"10.1016/j.jaerosci.2025.106735","url":null,"abstract":"<div><div>Turbulent particle dispersion in wall-bounded flows plays a critical role in a range of industrial and biomedical applications, including respiratory drug delivery and inhalation toxicology. This study investigates the performance of a hybrid Stress-Blended Eddy Simulation (SBES) turbulence model coupled with the Discrete Random Walk (DRW) particle dispersion model to predict particle transport and deposition in simple cylindrical and complex anatomical geometries. Simulations were conducted using CFD for three configurations: a vertical tube, a 90° pipe bend, and a realistic human nasal airway, under fully turbulent conditions (Re = 10,000) and two inhalation flow rates (30 and 60 L/min).</div><div>The SBES model provided improved resolution of turbulent structures and consistent agreement with experimental correlations for particle deposition in all geometries. In the vertical tube where particle deposition is driven by turbulence dispersion, the <span><math><mi>k</mi></math></span>–<span><math><mi>ω</mi></math></span> SST model coupled with the Low-Reynolds Number (LRN) correction provided the most accurate results. However, in the <span><math><mrow><mn>90</mn><mo>°</mo></mrow></math></span> pipe bend and nasal cavity, where deposition was dominated by inertial impaction, sensitivity to the LRN correction was reduced. For nasal airflow simulations, the SBES model with or without the LRN correction produced accurate deposition trends across all particle sizes and flow rates.</div><div>Results underscore that model selection should be tailored to the dominant deposition mechanism, turbulence-driven or inertia-driven. Whilst the SBES model with the LRN correction offered the most consistent performance in resolving turbulent dispersion for all three cases, the standard <span><math><mi>k</mi></math></span>–<span><math><mi>ω</mi></math></span> SST model with LRN correction was more accurate for turbulence driven deposition.</div><div>Future work should evaluate additional dispersion models such as the Continuous Random Walk (CRW) to further improve physical realism in particle transport simulations. This study reinforces the value of the SBES model in simulating complex, aerosol behaviour in respiratory applications.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"192 ","pages":"Article 106735"},"PeriodicalIF":2.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulation on charging and dynamics of a flowing bacterial aerosol in parallel-rod dielectric barrier discharge","authors":"Liyang Zhang ,&nbsp;Jiacun Wu ,&nbsp;Zihao Feng ,&nbsp;Kaiyue Wu ,&nbsp;Yutai Li ,&nbsp;Haiyun Luo ,&nbsp;Xiaole Zhang ,&nbsp;Yangyang Fu","doi":"10.1016/j.jaerosci.2025.106733","DOIUrl":"10.1016/j.jaerosci.2025.106733","url":null,"abstract":"<div><div>Dielectric barrier discharge (DBD) plasma is an emerging and promising technique for air disinfection. However, the charging mechanisms and dynamics of flowing bioaerosols interacting with transient streamer discharges remain poorly understood. In this study, a coupled model was developed to simulate the interactions of a flowing bacterial particle with a single-filament DBD. The model integrates a plasma model, a fluid flow model, and an aerosol dynamic model. The impacts of airflow velocity, voltage frequency, particle size, and particle permittivity were examined. Spatial analysis reveals that the effective particle charging region extends up to ∼20 times the filament size (∼50 μm). Bipolar charging was observed due to distinct electron and positive ion distributions in DBD. Most of the domain (Region II) exhibits positive charging dominated by expanded positive ions, while electron charging plays a significant role within the plasma region (Region I). For a 1-μm particle, the steady-state charge ranges from −350 to +450 elementary charges (e). In Region II, the steady-state charging is proportional to the square of its diameter (<em>d</em>_p²) due to the field charging of positive ions. However, in Region I, the charge value deviates from this proportionality due to the significant contributions of electron thermal motion and drift flux. Increasing particle relative permittivity (4–80) predominantly enhances charging in Region II (up to ∼500 e), which is attributed to dielectric polarization and the increasing positive-ion drift flux. Regarding aerosol dynamics, the surface-charge-induced electric field was found to have a critical influence on the particle trajectory. Under low-frequency (&lt;300 Hz) and/or low-velocity (&lt;2 m/s), particles exhibit unique behaviors like surface trapping, vortex-shaped/helical trajectories, and compressed motion. Additionally, increasing the particle size can significantly enhance surface trapping and vortical oscillation, while permittivity exerts a limited influence. These findings can provide insights into the mechanisms of plasma-aerosol interactions and offer guidance for optimizing plasma-based air disinfection and particle manipulation systems.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"192 ","pages":"Article 106733"},"PeriodicalIF":2.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145735696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deposition uniformity characteristics of electrohydrodynamic atomization printing based on three-dimensional Lagrangian discrete microparticles with size distribution","authors":"Chao Hu,&nbsp;Jiankui Chen,&nbsp;Wei Chen,&nbsp;Guozhen Wang,&nbsp;Zhouping Yin","doi":"10.1016/j.jaerosci.2025.106730","DOIUrl":"10.1016/j.jaerosci.2025.106730","url":null,"abstract":"<div><div>Electrohydrodynamic atomization printing is a very promising technology for thin film deposition. Mainly due to the ability to form plumes of highly uniform droplets under electrostatic fields. However, the plume divergence mechanism in the printing process and the parametric influence of deposition uniformity are still not well explained. This study proposes a multiphysics field coupling model based on three-dimensional Lagrangian particles, which is capable of completely and accurately describing the morphology of electrohydrodynamic atomization printing patterns and the deposition characteristics of charged droplet plume. The time-series deposition and force analysis of printing process are discussed. In addition, by analyzing the relationship between the effects of different parameters on the printing process, the mechanisms affecting the pattern morphology and deposition uniformity are revealed. The results show that the radial expansion of the plume continuously increases the inhomogeneity between the deposition center and the edge. The electric force drives the axial movement of the droplets, while the magnitude of the Coulomb force determines the morphology and spreading extent of the plume. There is a maximum value of deposition uniformity over the range of variation of voltage and flow rate and a minimum value of deposition uniformity over the range of variation of viscosity. Increases in solution conductivity and surface tension can enhance deposition uniformity, while the relative dielectric constant has the opposite effect. These studies contribute to a better understanding of the electrohydrodynamic atomization printing process, provide a theoretical basis for parameter selection and solution formulation, and can provide valuable guidance for optimizing the printing process.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"192 ","pages":"Article 106730"},"PeriodicalIF":2.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145735708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Water-soluble filter-inspired comparison of culture-free detection and current national standard for assessing bioaerosol contamination","authors":"Saisai Yan ,&nbsp;Zishu Wen ,&nbsp;Qing Liu ,&nbsp;Zhanjie Liu ,&nbsp;Miao Zhang ,&nbsp;Xinlin Liu ,&nbsp;Dongming Xing","doi":"10.1016/j.jaerosci.2025.106734","DOIUrl":"10.1016/j.jaerosci.2025.106734","url":null,"abstract":"<div><div>Sampling and detection of bioaerosols is highly desirable for control and early warning of microbial contamination. However, the current national standard for assessing bioaerosols is formulated based on the culture strategy. To accelerate the updates of current standards, alternative protocols need to be explored and investigated in field. Herein, a comparative study between the culture-free detection with current Chinese national standard was performed in the simulated and real-world bioaerosol environments. Benefiting from high-performance sampling supported by the hyaluronic acid air filter membrane (HAFM), which is produced of hyaluronic acid and gelatin, airborne microbes can be effectively captured and collected regardless of the bioaerosol concentration. By employing the all-in-one luminescence reagent, culture-free detection of trapped microorganisms was realized with ATP bioluminescence. Importantly, the water-soluble filter-inspired “dual purposes of one filter” mode was achieved to ensure the accurate transformation of colony cultivation to ATP bioluminescence. A clear linear relationship was obtained between the culture-free detection with the current standard, which suggests that the counting (CFU values) of colony cultivation can be replaced by the corresponding luminescence intensity (RLU values) of ATP bioluminescence. This work provides a specific attempt for standard replacement and may inspire more advanced benchmarks to assess the bioaerosol contamination.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"192 ","pages":"Article 106734"},"PeriodicalIF":2.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145735694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of the predictive ability of standard and refined laser-induced incandescence models against experimental databases from the literature – A benchmarking analysis of commonly used modeling approaches","authors":"R. Lemaire ,&nbsp;S. Menanteau","doi":"10.1016/j.jaerosci.2025.106716","DOIUrl":"10.1016/j.jaerosci.2025.106716","url":null,"abstract":"<div><div>Laser-induced incandescence (LII) has become a workhorse of particulate measurement. Interpreting measured signals properly, while inferring soot properties and/or physical parameters needed for signal simulations, however, requires developing modeling tools capable of predicting the radiative emission from laser-heated soot. Although significant effort has gone into gaining an in-depth understanding of the physical processes driving the LII phenomenon, the validity of current models, which are based on soot unsteady nanoscale heat and mass balances, is still subject to large uncertainties. The variability in the results from different simulation tools notably stems from their widely diverging formulations and parameterizations. Efforts must thus be directed at determining the critical energy and mass balance mechanisms, formulating the equations accounting for these mechanisms, estimating underlying parameters, and proposing adapted model validation protocols. To address these issues, the present work, which first proposes a detailed review of LII modeling approaches commonly used in the literature, aims at assessing the predictive capability of a series of LII simulation tools against various published datasets. Overall, 21 model formulations and 236 parameterizations were tested, and to the best of the authors’ knowledge, this benchmarking analysis ranks as the most comprehensive of its kind. This paper also includes sensitivity analyses focusing on the values and/or expressions used to represent the thermal and mass accommodation coefficients as well as the density, heat capacity and absorption properties of soot, while analyzing the impact of the formulation used to account for the annealing, oxidation, sublimation and thermionic emission processes. To conclude, the predictive capability of a comprehensive model integrating terms representing the saturation of linear, single- and multiphoton absorption processes, non-thermal photodesorption of carbon clusters and corrective factors accounting for the shielding effect and multiple scattering within aggregates, was evaluated against data collected in laminar and turbulent spray flames of gaseous and liquid fuels stabilized under both atmospheric and high-pressure conditions. Although this work does not set out to identify a model which should be considered as universally valid, it still contributes to highlighting the potential strengths and weaknesses of particular models and sub-models, depending on targeted applications, while proposing insights into how to parameterize them. The detailed analysis proposed should thus be of interest for the LII community, notably by paving the way for future experimental and modeling works to be undertaken in order to improve our understanding of the fundamental mechanisms at play during LII and determining the underlying parameters.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"192 ","pages":"Article 106716"},"PeriodicalIF":2.9,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145921466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modelling the collision kernel of fractal nanoparticle agglomerates in homogeneous isotropic turbulence","authors":"Maximilian Karsch,&nbsp;Andreas Kronenburg","doi":"10.1016/j.jaerosci.2025.106681","DOIUrl":"10.1016/j.jaerosci.2025.106681","url":null,"abstract":"<div><div>Agglomeration dynamics of nano-sized particles in aerosol flame reactors are dominated by the effects of Brownian diffusion and turbulent shear. In this study, we perform population balance calculations to predict the evolution of an initially monodisperse nanoparticle population in a turbulent carrier gas. To evaluate the required coagulation rate coefficients for the resulting agglomerates, we extend a recently developed model for spherical particles by a suitable expression for the effective collision cross-section. Population balance calculations are validated by detailed particle simulations where trajectories of all primary particles and agglomerates are directly resolved and the structure of the agglomerates is preserved. The primary particle sizes considered here range from 50 to <span><math><mrow><mn>100</mn><mspace></mspace><mi>nm</mi></mrow></math></span>, corresponding to Knudsen numbers between 2.3 and 4.6.</div><div>Our results show that collision rates measured from detailed particle simulations are in good agreement with predictions by the extended collision kernel model. In contrast, comparisons with a standard model from the literature reveal systematic differences which can be as large as an order of magnitude and more depending on the conditions. In addition, the effect of morphology on the measured collision rates is found to be rather small due to an opposing effect of the effective collision diameter and the particle inertia.</div><div>An a posteriori comparison between direct numerical simulations and population balance calculations suggests that the extended collision kernel model is able to correctly reproduce the evolution of the agglomerate population. The standard model, on the contrary, yields slower agglomeration rates compared to the direct simulation as it neglects particle inertia effects and thus underestimates turbulence-driven collision rates between large nanoparticle agglomerates.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"191 ","pages":"Article 106681"},"PeriodicalIF":2.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microscopic visualization of interface phenomena in heterogeneous nucleation of water vapor on particles cluster","authors":"Li Lv ,&nbsp;Yixun Lu ,&nbsp;Xiaoning Zhao ,&nbsp;Longfei Chen ,&nbsp;Mingzhou Yu","doi":"10.1016/j.jaerosci.2025.106715","DOIUrl":"10.1016/j.jaerosci.2025.106715","url":null,"abstract":"<div><div>Water vapor heterogeneous condensation on nanoparticles to form droplets plays a crucial role in many fields. This process involves a complex gas-liquid-solid three-phase transition. There are two main difficulties in measuring the interface phenomenon at the microscopic level: visualization of particles nucleation and controllable condensation of water vapor. So, we proposed an in-situ observation method for controllable condensation of water vapor by constructing a mixed superhydrophobic-fine particle surface, achieving direct observation of particles nucleation by using Environmental Scanning Electron Microscopy (ESEM). The results reveal that nucleation sites are initially located at the junction of any two-close particles. Although we established a nucleation model, determining the energy barrier proved challenging through analytical expressions or definite integrals due to the complexity of finding the original function. So, we developed the code to describe the quadrature region based on Boolean operation, and solved the energy barrier for the first time by using numerical integration methods. Our results show that the critical energy barrier at the junction of two particles is only 1/37 of that on a single particle. Most notably, when water vapor condenses on complex circular and chain-shaped multi-particles, the three-fold symmetry in circled particles will firstly initiate the nucleation.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"191 ","pages":"Article 106715"},"PeriodicalIF":2.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145516879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}