Journal of Aerosol Science最新文献

Aerosol microphysical and optical closure study in the Baltic Sea coastal zone 波罗的海海岸带气溶胶微物理和光学闭合研究

IF 2.9 3区环境科学与生态学

Journal of Aerosol Science Pub Date : 2026-03-01 Epub Date: 2025-12-31 DOI: 10.1016/j.jaerosci.2025.106741

Krzysztof M. Markowicz , Piotr Markuszewski , Michał A. Posyniak , Przemysław Makuch , Małgorzata Kitowska , Anna Rozwadowska

{"title":"Aerosol microphysical and optical closure study in the Baltic Sea coastal zone","authors":"Krzysztof M. Markowicz , Piotr Markuszewski , Michał A. Posyniak , Przemysław Makuch , Małgorzata Kitowska , Anna Rozwadowska","doi":"10.1016/j.jaerosci.2025.106741","DOIUrl":"10.1016/j.jaerosci.2025.106741","url":null,"abstract":"<div><div>This study presents results of a field experiment in the Baltic Sea coastal area focused on optical and microphysical aerosol properties and particle water uptake. This experiment took place in Sopot (Poland) in March 2023. Hygroscopic aerosol properties were measured with two Aurora 4000 nephelometers controlled by the Aerosol Condition System (ACS1000), absorption properties with an aethalometer AE-31, and aerosol size distribution with SMPS/OPS devices. Due to the variability of weather conditions, different aerosol properties were observed, including relatively clean marine air mass with sea spray as well as local and long-range transported pollution. Hygroscopic properties defined by the scattering enhancement factor <em>f</em>(RH) at 85 % of relative humidity (RH) and kappa parameters show elevated values not only during marine air masses but also during the transport of continental air masses from the south-western direction. Statistically significant Pearson correlation coefficients were found for relations between sulphate aerosol proportion in aerosol mass (from MERRA-2 reanalysis) and both hygroscopicity parameters, <em>f</em>(RH = 85 %) and kappa (0.47 and 0.54, respectively).</div><div>Experiment closure shows that the aerosol scattering coefficient obtained from numerical simulation based on aerosol size distribution from observations and refractive index estimated from MERRA-2 reanalysis agree with Aurora 4000 measurements. In the case of the aerosol absorption coefficient, the comparison with aethalometer observation is not so consistent due to the high sensitivity of this parameter to the assumed value of the imaginary part of the refractive index.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"193 ","pages":"Article 106741"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145903811","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}

引用次数: 0

The role of soot aggregate fusing in laminar flames: A study employing fusing models derived from carbon black 层流火焰中烟灰聚集体熔合的作用：采用炭黑熔合模型的研究

IF 2.9 3区环境科学与生态学

Journal of Aerosol Science Pub Date : 2026-03-01 Epub Date: 2026-02-04 DOI: 10.1016/j.jaerosci.2026.106758

Daniel O’Sullivan, Stelios Rigopoulos

{"title":"The role of soot aggregate fusing in laminar flames: A study employing fusing models derived from carbon black","authors":"Daniel O’Sullivan, Stelios Rigopoulos","doi":"10.1016/j.jaerosci.2026.106758","DOIUrl":"10.1016/j.jaerosci.2026.106758","url":null,"abstract":"<div><div>The evolving morphology of carbonaceous aggregates has been previously ignored to a large extent in sooting flame studies. Soot aggregate fusing causes a reduction in surface area and the number of primary particles per aggregate. Despite soot aggregate fusing directly impacting the morphology of aggregates, there is no agreed model for the characteristic timescale for this process. Previous flame simulations used fusing timescale models based on other materials such as titania and silica, which feature different fusing mechanisms. Recently, a series of carbonaceous-based soot fusing models have been proposed that are intrinsically derived from carbonaceous materials such as carbon black or lab-produced ethylene soot. In the present work, these carbonaceous-material-based soot fusing models are implemented in a two population balance equation (PBE) framework and are further coupled with a reactive computational fluid dynamics (CFD) code in order to simulate the laminar Santoro series of flames across all three smoking conditions (non-smoking, incipient smoking, smoking). Predictions of soot volume fraction, total number density, number of primary particles per aggregate, and primary particle diameter are presented across all three flames and compared against experimental observations where possible. The importance of soot fusing is elucidated across various regions within flames and the predictive power of each fusing model is discussed.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"193 ","pages":"Article 106758"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384850","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}

引用次数: 0

Characterization and comparison of particle size distribution of nonprescription topical spray drug products to inform potential inhalation exposure: Analysis of sunscreen spray drug products 非处方局部喷雾药物产品的粒径分布特征和比较，以告知潜在的吸入暴露：防晒喷雾药物产品的分析

IF 2.9 3区环境科学与生态学

Journal of Aerosol Science Pub Date : 2026-03-01 Epub Date: 2026-02-09 DOI: 10.1016/j.jaerosci.2026.106761

Lucy Nandy , Robert J. Bahde , Xiaofei Liu

{"title":"Characterization and comparison of particle size distribution of nonprescription topical spray drug products to inform potential inhalation exposure: Analysis of sunscreen spray drug products","authors":"Lucy Nandy , Robert J. Bahde , Xiaofei Liu","doi":"10.1016/j.jaerosci.2026.106761","DOIUrl":"10.1016/j.jaerosci.2026.106761","url":null,"abstract":"<div><div>There is a need for improved understanding of analytical procedures for physical characterization of aerosol particles from nonprescription topical <strong>pump spray and aerosol spray drug products</strong> to provide data on the potential risk of unintended inhalation exposure. This study examines the physical properties of sunscreen spray drug products, including the evolution of spray plumes and the potential for <strong>spray products</strong> to produce particles small enough to penetrate the unciliated airways. Laser diffraction was used to evaluate the particle size distribution (PSD) of particles released from commercial sunscreen sprays over horizontal distances of 10 to 60 cm from the spray nozzle. Early in the spray plume, PSD was observed to increase to larger particle sizes then shift toward smaller sizes further from the spray canister (≥25 cm). Physical processes including particle agglomeration, coalescence, solvent evaporation, and gravitational settling influenced spray plume characteristics and particle size evolution. The research findings in this study will inform approaches aimed at limiting unintended inhalation exposure from spray drug products, reducing the need for certain animal studies.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"193 ","pages":"Article 106761"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384851","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}

引用次数: 0

Particle image velocimetry for spray measurement of an Aerosol-on-Demand jet-printhead 用于气溶胶按需喷射打印头喷雾测量的粒子图像测速

IF 2.9 3区环境科学与生态学

Journal of Aerosol Science Pub Date : 2026-03-01 Epub Date: 2026-02-06 DOI: 10.1016/j.jaerosci.2026.106760

Dominic Poeppe , Martin Ungerer , Jochen Kriegseis , Marc Hehner , Ingo Sieber

引用次数: 0

Construction of an Asian standardized nasal cavity model via image registration for computational analysis of drug particle deposition 基于图像配准的亚洲标准化鼻腔模型构建及药物颗粒沉积计算分析

IF 2.9 3区环境科学与生态学

Journal of Aerosol Science Pub Date : 2026-03-01 Epub Date: 2026-02-16 DOI: 10.1016/j.jaerosci.2026.106764

Ziyu Jin , Gang Guo , Shiqi Wang , Jingyu Shi , Zhenbo Tong , Langui Xie

{"title":"Construction of an Asian standardized nasal cavity model via image registration for computational analysis of drug particle deposition","authors":"Ziyu Jin , Gang Guo , Shiqi Wang , Jingyu Shi , Zhenbo Tong , Langui Xie","doi":"10.1016/j.jaerosci.2026.106764","DOIUrl":"10.1016/j.jaerosci.2026.106764","url":null,"abstract":"<div><div>The nasal cavity plays a critical role in air conditioning, filtration, and intranasal drug delivery, yet marked inter-individual variability in anatomy results in substantial differences in airflow and particle deposition. This limits the generalizability of subject-specific computational fluid dynamics (CFD) studies, highlighting the need for standardized models. The standardized model developed in this study is a nasal airway geometry whose key geometric parameters fall in the vicinity of the median values of the study cohort, thereby making the model more morphologically representative. Moreover, relative to any single subject-specific anatomy, this standardized model yields particle-deposition simulation results that more closely approximate the cohort median, effectively reducing the risk of bias arising from inter-individual geometric variability. In this study, CT-based nasal cavity geometries from fourteen Asian adults were reconstructed and aligned using three image registration strategies to generate candidate standard models. Results indicate that the approach using rigid alignment provides findings that show the closest match to features in the group. This method yields a nasal cavity geometry whose cross-sectional area and perimeter consistently approximate the median values of the respective parameter distributions across the individual cohort. Deposition simulations across particle sizes (5–50 μm) and flow rates (15–45 L/min) revealed consistent trends, with Method 1 producing deposition patterns that closely matched population averages. Method 1 provided the combination of maintaining actual form and representing the most effective function, and results support using this method as a model that provides a reliable reference for simulations of delivery of treatment through the nose and related work examining breathing.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"193 ","pages":"Article 106764"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384936","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}

引用次数: 0

Effects of calcium chloride addition on the soot formation characteristics of ethylene pyrolysis in a laminar flow reactor 添加氯化钙对层流反应器中乙烯热解烟尘形成特性的影响

IF 2.9 3区环境科学与生态学

Journal of Aerosol Science Pub Date : 2026-03-01 Epub Date: 2026-01-27 DOI: 10.1016/j.jaerosci.2026.106755

Qingyan He , Sen Shao , Qifeng Guo , Xiaoqing You

引用次数: 0

Unraveling the effect of the idealized cross-sectional shapes of nasal track on flow structure and aerosol deposition, and comparison with realistic nasal cavity 揭示理想鼻道截面形状对气流结构和气溶胶沉积的影响，并与现实鼻腔进行比较

IF 2.9 3区环境科学与生态学

Journal of Aerosol Science Pub Date : 2026-03-01 Epub Date: 2026-02-06 DOI: 10.1016/j.jaerosci.2026.106754

Mustafa Abdullah , Rasha Ali Abdalhuseen , G. PadmaPriya , Y. Sasikumar , Renu Sharma , Abhayveer Singh , Rasulbek Eshmetov , Murodjon Yaxshimuratov , Samim Sherzod

{"title":"Unraveling the effect of the idealized cross-sectional shapes of nasal track on flow structure and aerosol deposition, and comparison with realistic nasal cavity","authors":"Mustafa Abdullah , Rasha Ali Abdalhuseen , G. PadmaPriya , Y. Sasikumar , Renu Sharma , Abhayveer Singh , Rasulbek Eshmetov , Murodjon Yaxshimuratov , Samim Sherzod","doi":"10.1016/j.jaerosci.2026.106754","DOIUrl":"10.1016/j.jaerosci.2026.106754","url":null,"abstract":"<div><div>The geometry of the human nasal cavity is highly complex and varies considerably along the respiratory tract, from the nostrils to the larynx. Unlike a uniform channel, the nasal passage shows irregular cross-sections and shapes that continuously change, greatly affecting airflow behavior, wall shear stress distribution, and the deposition of inhaled particles. Understanding these flow features is crucial not only for physiological insights into nasal breathing but also for medical applications such as filtration efficiency, optimizing intranasal drug delivery, and assessing particle exposure in respiratory health studies. In this study, the nasal cavity was simplified as a bent channel with different cross-sectional geometries, specifically triangular, circular, square, and rectangular ducts, and the flow was compared to that in the actual nasal cavity. To ensure fair comparison, all geometries were designed to have the same hydraulic diameter, removing size differences and focusing solely on the effect of shape. Computational fluid dynamics (CFD) simulations evaluated wall shear stress, streamline patterns, filtration effectiveness, and aerosol deposition in both the idealized channels and realistic nasal cavities. The results are expected to provide new insights into how physiological features of the nasal cavity and cross-sectional variations influence nasal airflow.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"193 ","pages":"Article 106754"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384938","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}

引用次数: 0

An optical sensing method for external mixed aerosol based on light scattering angular spectrum 基于光散射角谱的外混合气溶胶光学传感方法

IF 2.9 3区环境科学与生态学

Journal of Aerosol Science Pub Date : 2026-03-01 Epub Date: 2026-01-29 DOI: 10.1016/j.jaerosci.2026.106753

Tian Deng , Xue E. Sheng , Qian H. He , Yi Luo , Xiang Zheng

{"title":"An optical sensing method for external mixed aerosol based on light scattering angular spectrum","authors":"Tian Deng , Xue E. Sheng , Qian H. He , Yi Luo , Xiang Zheng","doi":"10.1016/j.jaerosci.2026.106753","DOIUrl":"10.1016/j.jaerosci.2026.106753","url":null,"abstract":"<div><div>Mixed aerosols are ubiquitous and play a vital role in production and life, such as chemical and pharmaceutical industries, air pollution study, and so on. Particle size distribution (PSD) and concentration serve as general and critical tools to analyze their chemical and physical properties. However, mixed aerosols are often treated erroneously as one homogeneous aerosol to simplify their measurement, and the characteristic parameters of each elementary aerosol cannot be obtained separately and accurately. In this study, we propose an optical method with a compact set-up to characterize elementary aerosols of binary external mixed aerosol based on the Light Scattering Angular Spectrum (LSAS). PSDs, refractive indexes, and concentrations of each elementary aerosol are decoupled from continuous angular light scattering signals using an improved particle swarm algorithm. A prototype sensor was designed for validation. The laboratory experimental results indicate that the maximum relative error of LSAS between our prototype sensor and reference data is 17.15% and the mean relative error of the inversion result between test aerosol parameters is 4.91%. Our method provides an exceptional ability for real-time and in-situ monitoring of mixed aerosol in industry.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"193 ","pages":"Article 106753"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074534","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}

引用次数: 0

Technical note: Frozen moment ratio and persistent memory in shear-induced coagulation within a decaying vortex 技术说明：在衰减涡旋中剪切诱导凝固的冻结力矩比和持久记忆

IF 2.9 3区环境科学与生态学

Journal of Aerosol Science Pub Date : 2026-03-01 Epub Date: 2026-01-20 DOI: 10.1016/j.jaerosci.2026.106752

Ruijin Xie , Mingliang Xie

{"title":"Technical note: Frozen moment ratio and persistent memory in shear-induced coagulation within a decaying vortex","authors":"Ruijin Xie , Mingliang Xie","doi":"10.1016/j.jaerosci.2026.106752","DOIUrl":"10.1016/j.jaerosci.2026.106752","url":null,"abstract":"<div><div>We report the discovery of a frozen state in shear-induced coagulation of particles within a decaying Taylor-Green vortex, using high-resolution numerical simulation based on the average kernel method. Contrary to the well-established self-similar theory predicting a moment ratio <span><math><mrow><msub><mi>M</mi><mi>C</mi></msub><mo>=</mo><mn>2</mn></mrow></math></span> for homogeneous systems, the spatially averaged value <span><math><mrow><mo>⟨</mo><msub><mi>M</mi><mi>C</mi></msub><mo>⟩</mo></mrow></math></span> stabilizes at approximately <span><math><mrow><mn>4.5</mn></mrow></math></span> under the condition <span><math><mrow><mi>R</mi><mi>e</mi><mo>=</mo><mn>10</mn><mo>,</mo><mi>S</mi><mi>c</mi><mo>=</mo><mn>1</mn><mo>,</mo><mi>D</mi><mi>a</mi><mo>=</mo><mn>1</mn></mrow></math></span>. This frozen state arises because the statistical properties of the moment fields, established during the early vigorous flow stage, become locked in as the flow decays. The coagulation rate diminishes to negligible levels <span><math><mrow><mrow><mo>⟨</mo><msub><mi>T</mi><mrow><mi>c</mi><mi>o</mi><mi>a</mi><mi>g</mi></mrow></msub><mo>⟩</mo></mrow><mo>∼</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>9</mn></mrow></msup></mrow></math></span> while convective and diffusive transport vanish, preventing the system from reaching the classical homogeneous equilibrium. Our findings reveal a strong history dependence in coagulation dynamics, demonstrating that spatially averaged moment statistics can become path-dependent and remain far from homogeneous equilibrium, even after flow motion ceases. This challenges the common reduction of spatially extended systems to zero-dimensional models and has significant implications for predicting aerosol evolution in decaying turbulence environments.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"193 ","pages":"Article 106752"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023979","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}

引用次数: 0

Time of flight studies of cluster reaction-diffusion in parabolic flow reactor tubes 抛物流反应器管内簇反应扩散的飞行时间研究

IF 2.9 3区环境科学与生态学

Journal of Aerosol Science Pub Date : 2026-03-01 Epub Date: 2026-02-04 DOI: 10.1016/j.jaerosci.2026.106759

Luis J. Perez-Lorenzo , Christian Luebbert , Francisco J. Higuera , Juan Fernandez de la Mora

{"title":"Time of flight studies of cluster reaction-diffusion in parabolic flow reactor tubes","authors":"Luis J. Perez-Lorenzo , Christian Luebbert , Francisco J. Higuera , Juan Fernandez de la Mora","doi":"10.1016/j.jaerosci.2026.106759","DOIUrl":"10.1016/j.jaerosci.2026.106759","url":null,"abstract":"<div><div>A high resolution tandem differential mobility analyzer (TDMA) is run in pulsed mode. A first DMA injects square waves of size-selected parent clusters at the inlet of a parabolic flow reactor tube, where they partially decompose and diffuse to the walls. Parent and product clusters then enter a second DMA provided with 256 electrical detectors. Time of flight (TOF) <em>I</em>(<em>t</em>) spectra are thus continuously obtained at 256 closely spaced different mobilities. For non-diffusive and non-reactive particles with uniform entry concentrations, the expected <em>I</em>(<em>t</em>) following aerosol interruption is constant for <em>t</em><<em>τ</em> (=shortest flow residence time) in the tube center. It then decays as (<em>t</em>/<em>τ</em>)<sup>−2</sup>, since slower near-wall particles take longer to exit. Diffusion and chemical reactions consume preferentially slow near-wall clusters, reducing the long-time tails, and leading to distinguishable TOF signatures for different particle diffusivities and dimensionless first order decomposition rates <em>K</em>. Measurements with non-reactive nanodrops (<em>K</em> = 0) show approximately the expected initial constant signal in the TOF spectra, followed by a decay considerably faster than (<em>t</em>/<em>τ</em>)<sup>−2</sup>. Measurements of TOF spectra agree approximately with transient numerical calculations for parabolic flow, and more closely with calculations including the brief flow development entry region. These calculations show modest sensitivities of TOF spectra to the dimensionless decomposition rate for <em>K</em> values of order unity, but substantial dependence for <em>K</em> > 5. The TOF approach would hence improve upon steady TDMA measurements for determining large reaction rates. Also, TOF measurements obtain <em>K</em> by probing the parent ion alone, while steady measurements have required product and parent abundance information.</div></div>","PeriodicalId":14880,"journal":{"name":"Journal of Aerosol Science","volume":"193 ","pages":"Article 106759"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384940","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}

引用次数: 0