Article
Engineering, Chemical
Botong Wen, Yingchun Wu, Zhu Zhuo, Xuecheng Wu
Summary: Astigmatic interferometric particle imaging (AIPI) is developed as an extension of traditional interferometric particle imaging (IPI) to measure the size and 3D position of volumetric droplets in a sparse spray. The AIPI setup can accurately extract droplet size and depth position from the fringe spacing and orientation of interferogram. AIPI has demonstrated high accuracy in simultaneous 3D position and size measurements.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Yingchun Wu, Xiaoxiang Zhao, Hongyu Zhang, Xiaodan Lin, Xuecheng Wu
Summary: Researchers propose a method combining digital inline holography (DIH) and interferometric particle imaging (IPI) techniques to discriminate water droplets and ice crystals and measure their sizes and shapes. The method uses a color camera to simultaneously record the DIH and IPI signals of the same droplet/crystal. The experimental results show that the proposed method is effective in discriminating water droplets and ice crystals.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Engineering, Chemical
Zhu Zhuo, Yingchun Wu, Botong Wen, Xuecheng Wu
Summary: This study investigates the feasibility of astigmatic dual-beam interferometric particle imaging (ADIPI) for measuring the three-dimensional positions and sizes of spherical metal droplets at panoramic scattering angle. The results show that the measurements of the same droplets from different angles are essentially identical in terms of depth position and size. ADIPI technology offers flexibility and has great potential in metal droplet measurement.
Article
Chemistry, Physical
Margaritis Kostoglou, Thodoris D. Karapantsios, Angeliki P. Chondrou, Maria C. Vlachou
Summary: It is commonly known that different methods for measuring particle size distributions can yield significantly different results. While this can be explained for solid particles due to differences in aspects beyond just size (such as shape), it is more challenging for small size emulsion droplets which are spherical in shape. This study proposes that the error distribution in droplet size is the reason for different results from different measuring methods. Each method relies on a physical principle, causing the error to be uniformly distributed across the values of the corresponding variable. Attempts to transform this variable result in severe error maldistribution. The study not only explains the deviations in droplet size distribution between measuring methods but also suggests the combination of information from two methods to improve accuracy compared to individual methods.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Shuyi Zhou, Xiaoyan Liu, Jiaxu Duan, Fabian Herz
Summary: A novel model-based defogging method for particle images in industrial environment is proposed in this study, which outperforms current methods in removing unevenly distributed fog and improving the measurement accuracy of particle size. The method utilizes a physical model and adaptive algorithm to estimate key parameters and generate fog-free images, showing adaptivity to different illuminations and fog distributions.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Chemistry, Multidisciplinary
Batuhan Yildirim, Adam Washington, James Doutch, Jacqueline M. Cole
Summary: This paper outlines procedures for calculating small-angle scattering (SAS) intensity functions from 2-dimensional electron-microscopy (EM) images, comparing the results with experimental data and discussing limitations and potential applications of the method.
Article
Optics
Barbara Delestre, Alexis Abad, Mohamed Talbi, Michael Fromager, Marc Brunel
Summary: In this study, the 3D reconstruction of programmable rough particles was performed using a Digital Micromirror Device (DMD), with the error-reduction algorithm for 2D shape reconstructions and filtered back-projection for 3D tomographic reconstruction.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2022)
Article
Engineering, Mechanical
Hywel Davies, Midhat Talibi, Andrea Ducci, Nishant Parsania, Ramanarayanan Balachandran
Summary: This paper proposes an effective Lagrangian Planar Interferometric Tracking (PIT) processor to track the size and path of multiple droplets. It analyzes the sources of errors in droplet measurement and assesses their impact on the final results. The feasibility of the method is validated through experiments and comparison with model predictions.
EXPERIMENTS IN FLUIDS
(2022)
Article
Optics
Barbara Delestre, Alexis Abad, Mohamed Talbi, Michael Fromager, Marc Brunel
Summary: The Error-Reduction algorithm is tested for reconstructing 2D shapes of irregular rough particles from interferometric images, first on centrosymmetric particles and then on non-centrosymmetric particles with added difficulty due to the twin image problem.
OPTICS COMMUNICATIONS
(2021)
Article
Geography, Physical
Erin L. Harvey, Tristram C. Hales, Daniel E. J. Hobley, Jie Liu, Xuanmei Fan
Summary: The grain-size distribution of mass movement deposits is important for studying initiation, transport, and deposition mechanisms. However, determining the distribution is challenging due to inaccessibility, heterogeneity, and time-consuming calculations. This study compares five common methods and finds that method choice can introduce significant uncertainties.
EARTH SURFACE PROCESSES AND LANDFORMS
(2022)
Article
Engineering, Chemical
Guoqiang Wu, Sheng Chen
Summary: This study examines the collision of a droplet against a moving/fixed particle and compares the two scenarios using the lattice Boltzmann method. It is found that the collision of a moving droplet against a fixed particle exhibits three regimes, while the collision of a moving droplet against a moving particle only exhibits two regimes. Additionally, the deposition regime of a droplet colliding against a moving particle is observed to have two sub regimes for the first time.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Agronomy
Lu Xun, Emilio Gil
Summary: A novel methodology was proposed to analyze water-sensitive papers (WSPs) for evaluating spray quality. The segmentation of overlapping droplets based on concave point detection and ellipse fitting achieved high accuracy. A linear relationship between droplet density and coverage was observed, and simulated WSPs were generated for high coverage estimation. This approach allows for more accurate spray quality indicators from WSP collectors.
Article
Engineering, Chemical
Zhiming Lin, Yingchun Wu, Zhu Zhuo, Xuecheng Wu
Summary: Dual-beam interferometric particle imaging (DIPI) has been extended to measure the size and two-dimensional position of opaque spherical particles in a plane with dual-sheet illumination. A general DIPI model based on geometric optics has been established, and proof-of-concept experiments incorporating digital inline holography (DIH) have been performed for validation. The proposed interferogram processing algorithm shows good accuracy in locating particle position and size.
Article
Engineering, Chemical
Carlos A. Renaudo, Agustin Yommi, Gonzalo Slaboch, Veronica Bucala, Diego E. Bertin
Summary: This paper presents a new model to represent the atomization process of a pre-orifice nozzle, and validates the accuracy of the model at different pressures through experiments. The model is based on the Maximum Entropy Principle, the Linearized Instability Sheet Atomization model, and Computational Fluid Dynamics simulations, and it can effectively predict the influence of pressure and physical properties of mixtures on droplet size distributions.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Oceanography
Rick A. Reynolds, Dariusz Stramski
Summary: The study examines variability in particle size distribution (PSD) using a dataset from the Pacific, Atlantic, and Arctic Oceans, finding significant changes in the contributions of different size classes between oceanic environments. Specific percentile diameters derived from cumulative distributions are strongly correlated with the contributions of different size classes and provide better estimation of their contributions.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
