Relevant bibliographies by topics / Hollow droplets / Journal articles
To see the other types of publications on this topic, follow the link: Hollow droplets.

Journal articles on the topic 'Hollow droplets'

Author: Grafiati
Published: 6 September 2023
Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Hollow droplets.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Gong, Chen, Feng Jia, and Can Kang. "Deposition of Water and Emulsion Hollow Droplets on Hydrophilic and Hydrophobic Surfaces." Agriculture 14, no. 6 (2024): 960. http://dx.doi.org/10.3390/agriculture14060960.

Full text
Abstract:
The deposition of spray droplets is a hot topic in the field of plant protection. The air-induction nozzle, which is commonly used in agricultural spray, can produce droplets containing bubbles. However, few studies have addressed the deposition of hollow droplets. In the present study, we used experimental and numerical methods to investigate the deposition of hollow droplets. Three kinds of liquid—water, oil-based emulsion and organosilicon—were used to produce hollow droplets, and the diameter of droplets varied from 3 to 4.5 mm. Both hydrophilic and hydrophobic surfaces were selected as de
APA, Harvard, Vancouver, ISO, and other styles
2

Vu, Truong V., Hiep T. Nguyen, and Nang X. Ho. "A numerical study of the coalescence of hollow droplets under solidification." Physics of Fluids 34, no. 5 (2022): 053318. http://dx.doi.org/10.1063/5.0093835.

Full text
Abstract:
This paper presents the results of numerical simulations of the coalescence and solidification of two hollow droplets. A base droplet (i.e., a pre-solidified droplet) stays on a supercool surface that causes its shell liquid to solidify. An incoming droplet then flows toward and coalesces with the base droplet. After coalescence of the droplets, the two hollow cores can coalesce depending on the momentum of the incoming hollow core and the solidification rate. A high solidification rate corresponding to a high Stefan number St prevents the hollow cores from coalescing and thus induces a discre
APA, Harvard, Vancouver, ISO, and other styles
3

Yao, Y. M., P. Joo, and S. C. Jana. "A Surfactant-Free Microfluidic Process for Fabrication of Multi-Hollow Polyimide Aerogel Particles." International Polymer Processing 35, no. 5 (2020): 481–92. http://dx.doi.org/10.1515/ipp-2020-350510.

Full text
Abstract:
Abstract This work focuses on fabrication of multi-hollow polyimide gel and aerogel particles from a surfactant-free oil-in-oil emulsion system using a microfluidic droplet generator operating under dripping mode. The multi-hollow gel and aerogel particles have strong potential in thermal insulation. Under jetting and tip-streaming regime of microfluidic flows, droplets are generated with no occluded liquid phase. The present study investigates a means of designing polyimide gel particles with plurality of internal liquid droplets by strategically manipulating the flow rates of the continuous
APA, Harvard, Vancouver, ISO, and other styles
4

Jabar, Ban, and Ahmed Abed al-Kadhem Majhool. "Visualization and Analysis Studies of Hollow Cone Spray under low Air Cross Flow Velocity under Atmospheric Condition." Al-Qadisiyah Journal for Engineering Sciences 12, no. 2 (2019): 105–11. http://dx.doi.org/10.30772/qjes.v12i2.602.

Full text
Abstract:
This study deals with the atomization of hollow cone spray water with low air cross flow. The visualization of the hollow cone spray by shadowgraphy, from the nozzle exit. The diameter of the nozzle allows to observe different modes of breakup and different structures (ligaments, helices, ...). The treatment of these images makes it possible to determine the drop size distribution of the spray droplets in function of length scales of the downstream flow. In the measurements of water hollow cone spray with injection pressures of 25kPa and air velocity of 10 m/sec. The calculations at the exit of th
APA, Harvard, Vancouver, ISO, and other styles
5

Widiyastuti, W., Wei-Ning Wang, I. Wuled Lenggoro, Ferry Iskandar, and Kikuo Okuyama. "Simulation and experimental study of spray pyrolysis of polydispersed droplets." Journal of Materials Research 22, no. 7 (2007): 1888–98. http://dx.doi.org/10.1557/jmr.2007.0235.

Full text
Abstract:
The size distribution and morphology of particles (dense or hollow) produced from polydispersed droplets in spray pyrolysis were studied both experimentally and theoretically. Zirconia, generated from a zirconyl hydroxychloride precursor, was selected as a model material. The simulation method that was previously developed by our group [J. Mater. Res., 15, 733 (2000)], in which droplets were assumed to be uniform, was improved to evaluate the effect of polydispersity in droplets on the size and morphology of the resulting particles. Simultaneous equations for heat and mass transfer of solvent
APA, Harvard, Vancouver, ISO, and other styles
6

Okamoto, Tatsuyuki, Toshimi Takagi, Toshikazu Kaji, Katsunori Shimazaki, and Kenji Nakanishi. "Studies on the Behavior of Droplets and the Air Flow in a Hollow-Cone Spray." Journal of Fluids Engineering 120, no. 3 (1998): 586–92. http://dx.doi.org/10.1115/1.2820704.

Full text
Abstract:
Experimental and numerical investigations are made on the behavior of droplets in a hollow-cone spray paying attention to the liquid sheet formed at the orifice of pressure-swirl atomizer. Simultaneous measurements of droplet sizes and velocities are made by phase-Doppler technique and numerical simulations are carried out based on the transient Eulerian equations for the gas and the Lagrangian equation for the droplets, taking account of the liquid sheet formed at the atomizer orifice. It is shown that the simulation gives good predictions by incorporating the existence of the liquid sheet. T
APA, Harvard, Vancouver, ISO, and other styles
7

Takahashi, Minoru, Arun Kumar Nayak, Shin-ichi Kitagawa, and Hiroyuki Murakoso. "Heat Transfer in Direct Contact Condensation of Steam to Subcooled Water Spray." Journal of Heat Transfer 123, no. 4 (2001): 703–10. http://dx.doi.org/10.1115/1.1370510.

Full text
Abstract:
The condensation heat transfer of saturated steam to a hollow-cone spray of subcooled water was investigated experimentally and analytically. The spray water temperature rose more steeply in flow direction than those in the previous studies, because of the use of smaller thermocouple which was capable of measuring the temperature in a thin water sheet and water droplets more accurately. The result of the condensation heat transfer coefficient suggested the breakup of the water sheet into droplets. A pure conduction model underpredicted the heat transfer in the sheet region significantly, which
APA, Harvard, Vancouver, ISO, and other styles
8

Zhang, Xiaoxuan, Lingyu Sun, Yu Wang, Feika Bian, Yuetong Wang, and Yuanjin Zhao. "Multibioinspired slippery surfaces with wettable bump arrays for droplets pumping." Proceedings of the National Academy of Sciences 116, no. 42 (2019): 20863–68. http://dx.doi.org/10.1073/pnas.1912467116.

Full text
Abstract:
Droplet manipulation is playing an important role in various fields, including scientific research, industrial production, and daily life. Here, inspired by the microstructures and functions of Namib desert beetles, Nepenthes pitcher plants, and emergent aquatic plants, we present a multibioinspired slippery surface for droplet manipulation by employing combined strategies of bottom-up colloidal self-assembly, top-down photolithography, and microstructured mold replication. The resultant multilayered hierarchical wettability surface consists of hollow hydrogel bump arrays and a lubricant-infus
APA, Harvard, Vancouver, ISO, and other styles
9

Zhu, Pei, Ziheng Xu, Jiangao Zhang, Quan Shao, Weiwang Chen, and Hongzhou Ai. "Numerical Study on Fire Suppression by Water Mist in Aircraft Cargo Compartments: Effects of Spray Pattern, Droplet Size, and Nozzle Layout." Fire 7, no. 12 (2024): 481. https://doi.org/10.3390/fire7120481.

Full text
Abstract:
Aircraft cargo compartment fires are one of the main threats to the safety of civil aircraft. In this study, a series of numerical simulations on the fire suppression performance of water mist in cargo compartments was carried out to examine the effects of the spray pattern, droplet size, and nozzle layout. The fire dynamics simulator (FDS) code was used to construct a fire suppression scenario in a full-scale aircraft cargo compartment. The results show that the extinguishment time of a corner fire was longer compared with center and sidewall fires due to the relatively larger distance from t
APA, Harvard, Vancouver, ISO, and other styles
10

Chen, Hongyue, Yongjian Zhang, Heyi Wang, Xin Dong, and Duyang Zang. "Evaporation Caused Invaginations of Acoustically Levitated Colloidal Droplets." Nanomaterials 13, no. 1 (2022): 133. http://dx.doi.org/10.3390/nano13010133.

Full text
Abstract:
Controlled buckling of colloidal droplets via acoustic levitation plays an important role in pharmaceutical, coating, and material self-assembly. In this study, the evaporation process of PTFE colloidal droplets with two particle concentrations (60 wt% and 20 wt%) was investigated under acoustic levitation. We report the occurrence of surface invagination caused by evaporation. For the high particle concentration droplet, the upper surface was invaginated, eventually forming a bowl-shaped structure. While for the low particle concentration droplet, both the upper and lower surfaces of the drop
APA, Harvard, Vancouver, ISO, and other styles
11

Gebhardt, Maurice R. "Rotary Disk Atomization." Weed Technology 2, no. 1 (1988): 106–13. http://dx.doi.org/10.1017/s0890037x00030189.

Full text
Abstract:
In the late 1930s, European engineers discovered that, for very low flow rates, rotary disk atomizers produced a more definable range of droplet sizes than hydraulic atomizers. In the late 1970s, a cup-like spinning atomizer was developed to apply herbicides at low and ultra-low volumes. Rotary atomizers distribute droplets in a pattern similar to hollow cone nozzles. The droplet trajectory could affect deposits adversely since droplets released horizontally are exposed to wind and other environmental effects longer than hydraulic spray nozzles. Propellers and fans were used to enhance downwar
APA, Harvard, Vancouver, ISO, and other styles
12

Wu, Hao, Juzheng Chen, Tianyi Jiang, et al. "Effect of Eccentricity Difference on the Mechanical Response of Microfluidics-Derived Hollow Silica Microspheres during Nanoindentation." Micromachines 15, no. 1 (2024): 109. http://dx.doi.org/10.3390/mi15010109.

Full text
Abstract:
Hollow microspheres as the filler material of syntactic foams have been adopted in extensive practical applications, where the physical parameters and their homogeneity have been proven to be critical factors during the design process, especially for high-specification scenarios. Based on double-emulsion droplet templates, hollow microspheres derived from microfluidics-enabled soft manufacturing have been validated to possess well-controlled morphology and composition with a much narrower size distribution and fewer defects compared to traditional production methods. However, for more stringen
APA, Harvard, Vancouver, ISO, and other styles
13

Wang, Hong Cheng, Li Jun Yang, Jia Liu, and Zhen Dong Dai. "Controlled Encapsulation of Micron-Sized Beads in a Droplet Based on Pulse Inertia Force Driving of Micro-Fluids." Key Engineering Materials 645-646 (May 2015): 1009–15. http://dx.doi.org/10.4028/www.scientific.net/kem.645-646.1009.

Full text
Abstract:
Loading drops with discrete objects, such as particles and cells, is often necessary when performing chemical and biological assays in microfluidic devices. The vast majority of reported encapsulating methods of particles into monodisperse picolitre droplets are based on micro-fluidic chip using the standard soft lithography technique are necessary. This paper presents a new approach, not based on micro-fluidic chip, for encapsulating particles into droplets actuated by microfluidic pulse inertia force. The polystyrene bead suspension can be ejected out of a tapered glass capillary in mineral
APA, Harvard, Vancouver, ISO, and other styles
14

Cao, Na, Liang Cao, Chang Cai Han, et al. "A Study of the Spray Characterization from a Centrifugal Nozzle by Pulsed Laser Holography." Applied Mechanics and Materials 152-154 (January 2012): 846–51. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.846.

Full text
Abstract:
Centrifugal nozzle is an important part of an areoengine in which fuel atomization has strong influence on engine performance. For investigating the fuel spray characteristics, a promising method named off-axis particle holographic measuring system is used here. Characteristics of the nonevaporating spray ejected from a new type of centrifugal nozzle which would be used in the near future are obtained under various injection conditions. By automatic analysis of the holographic reconstructed droplets images, a hollow-cone shape spray with most droplets concentrated in the surface of the cone is
APA, Harvard, Vancouver, ISO, and other styles
15

Kimura, Hiroshi, and Kaoru Saito. "Drying Structures of Droplets of Aluminosilicate-Based Hollow Particle Aqueous Dispersions." Powders 4, no. 2 (2025): 17. https://doi.org/10.3390/powders4020017.

Full text
Abstract:
The drying structures of droplets of colloidal aqueous dispersions exhibit a wide variety of patterns depending on experimental conditions. It has been established by previous researchers that capillary flows and Marangoni convection significantly influence the macroscopic pattern formation. To the best of our knowledge, this study is the first to focus on sessile droplets of aqueous dispersions containing hollow particles. These hollow particles have a lower density than water and thus float in the medium. The drying pattern of these droplets was markedly different from the well-known ring pa
APA, Harvard, Vancouver, ISO, and other styles
16

Leun, E. V. "The basics of construction of jet-drop optical systems for measuring electric field strength. Parth 2." Omsk Scientific Bulletin, no. 181 (2022): 78–88. http://dx.doi.org/10.25206/1813-8225-2022-181-78-88.

Full text
Abstract:
In this part of the article, the discussion of the construction of jet-drop optical measuring systems (JDOMS) for monitoring the electric field strength continues. The possibilities of increasing the resolution are considered. A variant of the interference JDOMS using triangulation stroboscopic measurements of displacements of charged moving droplets using a pulsed acousto-optic interferometer of transverse displacements of a laser beam is presented. The possibilities of increasing the charge/mass ratio of charged droplets, the features of using liquid metals and their two- and three-component
APA, Harvard, Vancouver, ISO, and other styles
17

Baesso, Murilo Mesquita, Francelino Augusto Rofrigues Junior, Ronaldo Goulart Magno Junior, Mauri Martins Teixeira, and Alcir Jose Modolo. "POPULATION AND SPECTRUM OF DROPLETS PRODUCED DURING ELECTROSTATIC SPRAYING AND HYDRAULIC SPRAYING USING AIR ASSISTANCE - DOI: 10.13083/1414-3984.v22n05a02." REVISTA ENGENHARIA NA AGRICULTURA - REVENG 22, no. 5 (2014): 408–12. http://dx.doi.org/10.13083/reveng.v22i5.427.

Full text
Abstract:
The droplet population produced during spraying influences the efficiency of pesticide application. It is possible to define a minimum number of droplets per unit area depending on the treatment and product to be applied. This study aimed to evaluate the characteristics of the populations and the spectra of droplets produced during electrostatic and air-assisted spraying. Factors including types of nozzles, spray volume, type of spray and its influence on the percentage coverage and density of droplet population. The experiment was arranged in a 2 x 2 x 2 factorial [two types of nozzles (Jacto
APA, Harvard, Vancouver, ISO, and other styles
18

Bayer, Tânia, Milton F. Cabezas-Guerrero, Casimiro D. Gadanha Junior, and Alci E. Loeck. "Systems and rates of aerial application of fungicides in irrigated rice." Revista Brasileira de Engenharia Agrícola e Ambiental 22, no. 2 (2018): 143–47. http://dx.doi.org/10.1590/1807-1929/agriambi.v22n2p143-147.

Full text
Abstract:
ABSTRACT The present research studied the performance of flat-fan and hollow-cone nozzles, with application rates of 20 and 30 L ha-1, and rotary disc atomizer with application rates of 10 and 15 L ha-1. The test was conducted with a fungicide spray tank composed of Azoxystrobin + Difenoconazole, in which the density and penetration of droplets into the canopy were evaluated using a water-sensitive paper and the distribution of the active ingredients in the plant was evaluated through the chromatographic analysis. Higher application rates resulted in higher droplet density in the upper stratum
APA, Harvard, Vancouver, ISO, and other styles
19

Helling, Tobias, Florian Reischl, Andreas Rosin, Thorsten Gerdes, and Walter Krenkel. "Atomization of Borosilicate Glass Melts for the Fabrication of Hollow Glass Microspheres." Processes 11, no. 9 (2023): 2559. http://dx.doi.org/10.3390/pr11092559.

Full text
Abstract:
Direct atomization of a free-flowing glass melt was carried out using a high-speed flame with the aim of producing tiny, self-expanding glass melt droplets to form hollow glass microspheres. Atomization experiments were carried out using a specially adapted free-fall atomizer in combination with a high-power gas burner to achieve sufficient temperatures to atomize the melt droplets and to directly expand them into hollow glass spheres. In addition, numerical simulations were carried out to investigate non-measurable parameters such as hot gas velocities and temperatures in the flame region by
APA, Harvard, Vancouver, ISO, and other styles
20

Mishra, Yogeshwar Nath, Timo Tscharntke, Elias Kristensson, and Edouard Berrocal. "Application of SLIPI-Based Techniques for Droplet Size, Concentration, and Liquid Volume Fraction Mapping in Sprays." Applied Sciences 10, no. 4 (2020): 1369. http://dx.doi.org/10.3390/app10041369.

Full text
Abstract:
Structured laser illumination planar imaging (SLIPI)-based techniques have been employed during the past decade for addressing multiple light scattering issues in spray imaging. In this article, SLIPI droplet sizing based on the intensity ratio of laser-induced fluorescence (LIF) over Mie scattering (SLIPI-LIF/Mie) and SLIPI-Scan for extinction-coefficient (µe) mapping are applied simultaneously. In addition, phase Doppler anemometry (PDA) and numerical calculations based on the Lorenz–Mie theory are also employed in order to extract the droplets Sauter mean diameter (SMD), the droplets number
APA, Harvard, Vancouver, ISO, and other styles
21

He, Yanping, Xin Li, Tianci Zhu, et al. "Controlling the Internal Structures of Polymeric Microspheres via the Introduction of a Water-Soluble Organic Solvent." Polymers 10, no. 7 (2018): 789. http://dx.doi.org/10.3390/polym10070789.

Full text
Abstract:
Polymeric microspheres with different internal structures have been widely used because of their characteristics in the structures. This paper reports a method of controlling the internal structures of polymeric microspheres via the introduction of a water-soluble organic solvent to the continuous phase in the foam phase preparation of porous polymeric microspheres. The introduction of a water-soluble organic solvent enables the control of polymeric microspheres’ internal structures, from porous to hollow. Because a water-soluble organic solvent is introduced, the organic solvent may be diffus
APA, Harvard, Vancouver, ISO, and other styles
22

Wu, Wangxia, Bing Wang, and Gaoming Xiang. "Impingement of high-speed cylindrical droplets embedded with an air/vapour cavity on a rigid wall: numerical analysis." Journal of Fluid Mechanics 864 (February 15, 2019): 1058–87. http://dx.doi.org/10.1017/jfm.2019.55.

Full text
Abstract:
The high-speed impingement of hollow droplets embedded with a cavity has fundamental applications in various scenarios, such as in spray coating and biomedical engineering. The impingement dynamics is modulated by the wrapping medium, different from that of denser solid droplets. With air and vapour cavities, the impingement of two kinds of hollow cylindrical droplets is simulated in the present study to investigate the morphology and physical mechanisms regarding droplet and cavity dynamics. The compressible two-phase Eulerian model is used to couple with the phase transition procedure. The r
APA, Harvard, Vancouver, ISO, and other styles
23

Vladisavljevic, Goran, Sabine Brösel, and Helmar Schubert. "Characterization of water-in-oil emulsions produced with microporous hollow polypropylene fibers." Journal of the Serbian Chemical Society 65, no. 11 (2000): 829–37. http://dx.doi.org/10.2298/jsc0011829v.

Full text
Abstract:
The preparation of fine and monodispersed water-in-oil (W/O) emulsions by utilizing hydrophobic hollow polypropylene fibers with 0.4 mm pores was investigated in this work. The experiments were carried out using demineralized water as the disperse phase, mineral oil Velocite No. 3 as the continuous phase, and polyglycerol polyricinoleate (PGPR 90) in the concentration range of 2.5 - 10 wt % as the oil-soluble emulsifier. The size of the water droplets in the prepared emulsions and the droplet size distribution strongly depend on the content of the disperse phase, the transmembrane pressure dif
APA, Harvard, Vancouver, ISO, and other styles
24

Pochert, Alexander, Sebastian Ziller, Sasa Kapetanovic, Gregor Neusser, Christine Kranz, and Mika Lindén. "Intermediate pickering emulsion formation as a means for synthesizing hollow mesoporous silica nanoparticles." New Journal of Chemistry 40, no. 5 (2016): 4217–22. http://dx.doi.org/10.1039/c5nj02855h.

Full text
APA, Harvard, Vancouver, ISO, and other styles
25

Leun, E. V. "The basics of construction of jet-drop optical systems for measuring the electric field strength. Part 1." Omsk Scientific Bulletin, no. 178 (2021): 83–90. http://dx.doi.org/10.25206/1813-8225-2021-178-83-90.

Full text
Abstract:
The article discusses the principles and possibilities of using jet-drop optical measuring systems for monitoring the electric field strength (EFS). Two applied techniques are considered. First, the deflection of flying charged droplets (balls, hollow granules) used as micro-objects sensitive to EFS and deviating from a given rectilinear trajectory of motion, like an electron in a kinescope. Secondly, stroboscopic determination of the position and/or displacement of drops by pulsed illumination of the side of the deflected drop by the optical flow and measurement of the reflection angle for it
APA, Harvard, Vancouver, ISO, and other styles
26

Zhang, Xiaoli, Juan Wei, and Xiaoming Zhang. "Encapsulated liquid nano-droplets for efficient and selective biphasic hydroformylation of long-chain alkenes." New Journal of Chemistry 43, no. 35 (2019): 14134–38. http://dx.doi.org/10.1039/c9nj02493j.

Full text
APA, Harvard, Vancouver, ISO, and other styles
27

Cai, Xu Dong, Jian Jiang Wang, Bao Cai Xu, Hong Fei Lou, and Xing Jian Huo. "Hollow Multiphase Ceramic Microspheres of Al+Cr2O3+SiO2 System Prepared by Self-Reaction Quenching Technology." Key Engineering Materials 512-515 (June 2012): 621–25. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.621.

Full text
Abstract:
This paper aims to study preparation and mechanism of hollow ceramic microspheres. With Al+Cr2O3+SiO2+sucrose+epoxy resin as reactive system, Al2O3-based hollow ceramic microspheres are synthesized and reaction mechanism of hollow ceramic microspheres is established. Results show that the quenching products consist of hollow spherical or irregularly spherical particles and irregularly powders. Spherical or irregularly spherical particles are hollow structure and constitutive of Al2O3-SiC diphase and a few Cr3Si、Cr7C3. The preparation of hollow ceramic microspheres includes igniting by heating,
APA, Harvard, Vancouver, ISO, and other styles
28

van Wijk, Judith, Tiaan Heunis, Elrika Harmzen, Leon M. T. Dicks, Jan Meuldijk, and Bert Klumperman. "Compartmentalization of bacteria in microcapsules." Chem. Commun. 50, no. 97 (2014): 15427–30. http://dx.doi.org/10.1039/c4cc04901b.

Full text
Abstract:
Lactobacillus plantarum strain 423 was encapsulated in hollow poly(organosiloxane) microcapsules by templating water-in-oil Pickering emulsion droplets via the interfacial reaction of alkylchlorosilanes.
APA, Harvard, Vancouver, ISO, and other styles
29

Becce, Lorenzo, Giovanna Mazzi, Ayesha Ali, et al. "Wind Tunnel Evaluation of Plant Protection Products Drift Using an Integrated Chemical–Physical Approach." Atmosphere 15, no. 6 (2024): 656. http://dx.doi.org/10.3390/atmos15060656.

Full text
Abstract:
The use of plant protection products (PPPs) has become fundamental to guarantee excellent field productivity. Nevertheless, their usage presents critical issues, such as the quantity of substances used, the relative toxicity, and the contamination of nearby fields caused by atmospheric drift. This study focuses on the characterization of aerosol droplets of PPPs produced by spraying a chemical marker, fluorescein, with an orchard airblast sprayer equipped with conventional hollow cone (HC) and anti-drift air inclusion (AI) nozzles, using a wind tunnel as a controlled environment. A particle/dr
APA, Harvard, Vancouver, ISO, and other styles
30

Liu, Xianbin, Hejun Du, Zhiyuan Zeng, and Xiao Wei Sun. "Controlled Synthesis of Hollow Hemispheric ZnO Shells/Cages on Graphite Fiber." ISRN Nanotechnology 2011 (June 8, 2011): 1–5. http://dx.doi.org/10.5402/2011/823216.

Full text
Abstract:
Hollow hemispheric ZnO shells/cages are synthesized on graphite fiber via simple thermal evaporation process. The cage-like ZnO structures exhibit micron or submicron size and hollow hemispheric shape with polycrystalline shell made of the ZnO nanocrystals. Controlled time-sequenced growth experiment is conducted to interpret the growth process, which indicates that the growth mechanism of the hollow hemispheric ZnO shells/cages involves formation of Zn particles firstly, followed by oxidation of the outer surface of Zn droplets and meantime sublimation of the core Zn.
APA, Harvard, Vancouver, ISO, and other styles
31

Glahn, A., M. F. Blair, K. L. Allard, S. Busam, O. Scha¨fer, and S. Wittig. "Disintegration of Oil Films Emerging From Radial Holes in a Rotating Cylinder." Journal of Engineering for Gas Turbines and Power 125, no. 4 (2003): 1011–20. http://dx.doi.org/10.1115/1.1586311.

Full text
Abstract:
A fundamental study has been performed to examine the disintegration of oil films emerging from radial holes in a rotating hollow cylinder. The configuration investigated is an abstraction of one of the droplet generation sources in an aeroengine bearing compartment; similar configurations may also occur inside gearboxes. The paper aims to contribute to both the determination of directly applicable droplet characteristics and the establishment of a database that can be used for the development of droplet generation models. Similar to a prior paper on droplet generation processes at the rim of
APA, Harvard, Vancouver, ISO, and other styles
32

Jiang, Yan Qiu, Ye Tang Pan, Xiao Wei Li, et al. "Preparation and Characterization of Hollow Spheres with Cubic Mesoporous Shell." Advanced Materials Research 785-786 (September 2013): 382–85. http://dx.doi.org/10.4028/www.scientific.net/amr.785-786.382.

Full text
Abstract:
This work demonstrated an approach of oil/water (O/W) microemulsion on preparation of hollow spheres with mesopores in the shell, in which a cationic surfactant was used as structural directing agent, alkane molecule as mesopore-swelling agent and oil droplets. The morphology and pore architecture of the obtained hollow spheres were characterized by SEM, XRD, TEM and N2adsorption/desorption isotherms. Cubic (Ia3d) mesopores are present in the shell and provide open channels for mass transport in between the hollow core and outer environment. The obtained hollow spheres with cubic mesoporous sh
APA, Harvard, Vancouver, ISO, and other styles
33

Liu, Jay G., and David L. Wilcox. "Factors influencing the formation of hollow ceramic microspheres by water extraction of colloidal droplets." Journal of Materials Research 10, no. 1 (1995): 84–94. http://dx.doi.org/10.1557/jmr.1995.0084.

Full text
Abstract:
Hollow ceramic microspheres of Al2O3, SiO2, and mullite have been prepared by the combination of an emulsion technique with a water extraction sol-gel method. Concentration of sol, initial droplet size, and water extraction rate of the system are found to be the important process parameters controlling the size and wall thickness of the hollow microspheres, and their influences are shown. A model that correlates the morphology of microspheres to concentration and water extraction rate is proposed and is in good agreement with the experimental observations. The capability and limitation of this
APA, Harvard, Vancouver, ISO, and other styles
34

Abraheem, Sajjad N., and Majid H. Alheidary. "Evaluation of Spray Droplets Characteristics Depending on the Configuration of Boomless Nozzle." IOP Conference Series: Earth and Environmental Science 1060, no. 1 (2022): 012128. http://dx.doi.org/10.1088/1755-1315/1060/1/012128.

Full text
Abstract:
Abstract Using hollow cone nozzles is a common in different spraying processes for controlling the pests. The aim of the study was to evaluate the spray droplet characteristics deposited on the eggplant plants at flowering vegetative growth stage. The study was performed in a Complete Block Random Design (CBRD) with a 3x4 factorial scheme, consisting of three working pressures 2, 3, and 5 bar, and four spray patterns of nozzles with three blocks. For obtaining micro details about spray droplets characteristics, white paper cards were used, which later had their images digitized and analyzed by
APA, Harvard, Vancouver, ISO, and other styles
35

Liu, Yang, Xinlong Sun, Feng Zhao, et al. "Controllable preparation of an ice cream-shaped hollow sphere array." RSC Advances 12, no. 15 (2022): 8936–39. http://dx.doi.org/10.1039/d2ra00236a.

Full text
Abstract:
In a hydrothermal environment, EGaIn liquid droplets in hole arrays transfer from liquid state into solid hollow spheres. They hold much air between the solid and liquid interface, enhancing the thermal insulation and superhydrophobic performance.
APA, Harvard, Vancouver, ISO, and other styles
36

Qu, Ying Dong, Chong Jiang, Xiao Hong Li, Rui Ming Su, and Rong De Li. "Effect of Charge Action on the Annular Molten Metal of Spray Forming." Applied Mechanics and Materials 217-219 (November 2012): 1890–93. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.1890.

Full text
Abstract:
This paper described the effect of hollow jet atomization technology, under charge action, according to the spray forming process, to improve the quality of atomization. In order to deeply study the charge action on the annular molten metal of spray forming process, this paper analyzed theoretically quantity of electric charge of the annular molten metal and the surface tension of atomization droplets. The results show that the quantity of electric charge increases with the increasing of charging voltage. Under the same conditions, the hollow annular metal liquid charge is always greater than
APA, Harvard, Vancouver, ISO, and other styles
37

Kabil, Islam, Mansour Al Qubeissi, Jihad Badra, et al. "An Improved Prediction of Pre-Combustion Processes, Using the Discrete Multicomponent Model." Sustainability 13, no. 5 (2021): 2937. http://dx.doi.org/10.3390/su13052937.

Full text
Abstract:
An improved heating and evaporation model of fuel droplets is implemented into the commercial Computational Fluid Dynamics (CFD) software CONVERGE for the simulation of sprays. The analytical solutions to the heat conduction and species diffusion equations in the liquid phase for each time step are coded via user-defined functions (UDF) into the software. The customized version of CONVERGE is validated against measurements for a single droplet of n-heptane and n-decane mixture. It is shown that the new heating and evaporation model better agrees with the experimental data than those predicted
APA, Harvard, Vancouver, ISO, and other styles
38

Zhang, Yueheng, Yang Su, Yingqing Wang, Jibao He, Gary L. McPherson та Vijay T. John. "Rapid fabrication of hollow and yolk–shell α-Fe2O3 particles with applications to enhanced photo-Fenton reactions". RSC Advances 7, № 62 (2017): 39049–56. http://dx.doi.org/10.1039/c7ra06621j.

Full text
APA, Harvard, Vancouver, ISO, and other styles
39

Rutkevičius, Marius, Georg H. Mehl, Jordan T. Petkov, Simeon D. Stoyanov, and Vesselin N. Paunov. "Fabrication of salt–hydrogel marbles and hollow-shell microcapsules by an aerosol gelation technique." Journal of Materials Chemistry B 3, no. 1 (2015): 82–89. http://dx.doi.org/10.1039/c4tb01443j.

Full text
Abstract:
We discovered a way to make hydrogel marbles with hydrophilic particles by rolling gelled aerosol droplets in a bed of salt microcrystals which after sieving and drying of the hydrogel cores yielded hollow-shell salt microcapsules.
APA, Harvard, Vancouver, ISO, and other styles
40

L Jordan, David. ""Peanut (Arachis hypogaea) Response to Fungicides and Herbicides Applied using Different Spray Nozzles"." Archives of Agriculture Research and Technology (AART) 5, no. 1 (2024): 1–3. http://dx.doi.org/10.54026/aart/1068.

Full text
Abstract:
Late leaf spot [caused by Nothopassalora personata (Berk. & M.A. Curtis) U. Braun, C. Nakash, Videira & Crous] is an economically important disease in peanut (Arachis hypogaea L.) and fungicides are used routinely to protect peanut from infection and the resulting yield loss. Herbicides are an important component of effective weed management in peanut. Concern over particle drift of pesticides exists in the farming community, especially after stewardship issues associated with synthetic auxin application in herbicide resistant crops in the United States. Spray nozzles that deliver larg
APA, Harvard, Vancouver, ISO, and other styles
41

Jans, Alexander, Jonas Lölsberg, Abdolrahman Omidinia-Anarkoli, et al. "High-Throughput Production of Micrometer Sized Double Emulsions and Microgel Capsules in Parallelized 3D Printed Microfluidic Devices." Polymers 11, no. 11 (2019): 1887. http://dx.doi.org/10.3390/polym11111887.

Full text
Abstract:
Double emulsions are useful geometries as templates for core-shell particles, hollow sphere capsules, and for the production of biomedical delivery vehicles. In microfluidics, two approaches are currently being pursued for the preparation of microfluidic double emulsion devices. The first approach utilizes soft lithography, where many identical double-flow-focusing channel geometries are produced in a hydrophobic silicone matrix. This technique requires selective surface modification of the respective channel sections to facilitate alternating wetting conditions of the channel walls to obtain
APA, Harvard, Vancouver, ISO, and other styles
42

Santosh, Sunil Shirwal, Sushilendra, Raghavendra V., Mareppa H., and Vinutha K. "Assessment of Nozzle Spray Characteristics for Agriculture Spraying." International Journal of Environment and Climate Change 13, no. 12 (2023): 527–36. http://dx.doi.org/10.9734/ijecc/2023/v13i123710.

Full text
Abstract:
The studies on the operational parameters of selected nozzles were conducted in the laboratory using a patternator with the operational parameters of four types of nozzles (hollow cone, 3-way discharge nozzle (3D), flood type, and solid cone nozzle), five operating pressures (400, 500, 600, 800, and 1000 kPa), and five nozzle heights (0.2, 0.3, 0.4, 0.5, and 0.6 m). The effects of independent variables on spray discharge, droplet size, uniformity coefficient, droplet density, and spray angle were studied. It was observed that the discharge rate increased by increasing the operating pressure, a
APA, Harvard, Vancouver, ISO, and other styles
43

Hou, Yong-shen. "Effect of Heat Treatment on Preparation of Ferrite Magnetite Hollow Beads by Self-Propagating Method." Journal of Physics: Conference Series 2174, no. 1 (2022): 012022. http://dx.doi.org/10.1088/1742-6596/2174/1/012022.

Full text
Abstract:
Abstract The characterization results of hollow ceramic beads show that oxidant KClO3 had a great influence on the preparation of hollow ceramic beads. The morphology picture and XRD analysis showed that the surface of hollow beads without KClO3 was smooth, and the particle size analysis results show that the particle size was 10 ~ 50μm. Without KClO3, the average particle size is 28.08 μm; After adding KClO3, dense dendritic crystal structure was distributed on the surface of hollow beads, and the phase is mainly BaFe2O4, and the distribution range of hollow beads is 5 ~ 40 μm, and the averag
APA, Harvard, Vancouver, ISO, and other styles
44

An, Tao, Hao Chen, Xianqian Sang, Yuchen Wang, and Haisheng Fang. "Solidification process of hollow metal droplets impacting a substrate." International Communications in Heat and Mass Transfer 159 (December 2024): 108252. http://dx.doi.org/10.1016/j.icheatmasstransfer.2024.108252.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Yuan, Feixiang, Chenchen Gu, Kechuan Yi, et al. "Atomization Characteristics of a Hollow Cone Nozzle for Air-Assisted Variable-Rate Spraying." Agriculture 13, no. 10 (2023): 1992. http://dx.doi.org/10.3390/agriculture13101992.

Full text
Abstract:
During variable-rate spraying in orchards, the atomization characteristics and distribution of droplets in and out of the target area can be affected by the sprayer pressure. In this study, a variable-rate spraying control system test bench was designed, and a hollow cone nozzle QY82.317.22 was selected. The droplet atomization characteristics, including volume median diameter (Dv0.5), the relative span of the droplet spectrum, and droplet velocity at different spray pressures, were studied at distances ranging from 0.4 to 2.4 m from the nozzle orifice with an air velocity of 10 m/s at the noz
APA, Harvard, Vancouver, ISO, and other styles
46

Liu, Shi Quan, Jian Cun Rao, Hai Xia Wang, and Hui Zhao. "A Simple Synthesis of Mesoporous Silica Hollow Microspheres by Fast Hydrolysis and Condensation of Tetraethyl Orthosilicate." Advanced Materials Research 189-193 (February 2011): 4335–38. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.4335.

Full text
Abstract:
Mesoporous silica hollow microspheres were quickly synthesized with a simple reaction medium which only contains tetraethylorthosilicate (TEOS) as silica source, octylamine (OA) as template and water. It is proposed that a dispersion of TEOS-in-water is formed when water is added into the mixture of TOS and OA. Water becomes basic due to dissolution of OA. Fast hydrolysis and condensation of TEOS then occurs at the interface of droplets lead to the formation of silica shells. Hollows are formed due to the volume contraction caused by the large difference in the densities of condensed silica an
APA, Harvard, Vancouver, ISO, and other styles
47

Li, Ling, Hong Liang Li, Ying Chun Zhu, Ai Ping Fu, Yong Wan, and Xiu Song Zhao. "Preparation of PS@SiO2, PS@TiO2，PS@TiO2/SiO2 Core-Shell Composites by a Spray Drying Process and Their Hollow Spheres after Removing PS Cores by Calcinations." Advanced Materials Research 194-196 (February 2011): 389–92. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.389.

Full text
Abstract:
Polystyrene (PS) spheres encapsulated core-shell composites of SiO2or TiO2nanoparticles were prepared by the spray drying technique and hollow spheres of SiO2or TiO2nanoparticles were then derived by removing the PS cores with calcinations. The PS spheres were dispersed into the SiO2or TiO2colloids, forming a suspension and then the suspensions were sprayed to form micrometer-sized droplets, as the droplets rush through the drying chamber, the PS spheres were encapsulated into the core of SiO2or TiO2particles due to the high temperatures and the instant evaporation, obtaining PS@SiO2, PS@TiO2o
APA, Harvard, Vancouver, ISO, and other styles
48

Buchholz, Moritz, Dominik Weis, Riccardo Togni, Christoph Goniva, and Stefan Heinrich. "Describing the Drying and Solidification Behavior of Single Suspension Droplets Using a Novel Unresolved CFD-DEM Simulation Approach." Processes 12, no. 3 (2024): 480. http://dx.doi.org/10.3390/pr12030480.

Full text
Abstract:
With increasing computational capacities and advances in numerical methods, a simulation-based process and product design approach for spray dried products has become the focus of many researchers. In this context, a novel unresolved CFD-DEM simulation approach for single suspension droplets is presented, which models the drying and solidification process in a hot gas environment. The solidification process is described by the formation of bonds between the primary particles in the suspension droplet, showing a plausible solidification behavior, which starts when a critical solid concentration
APA, Harvard, Vancouver, ISO, and other styles
49

Xu, Bao Cai, Rong Xia Duan, Jian Jiang Wang, Hong Fei Lou, and Long Zhang. "Ba–Ferrites Hollow Microspheres Prepared by Self–Reactive Flame Spraying Method." Key Engineering Materials 512-515 (June 2012): 249–52. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.249.

Full text
Abstract:
Barium ferrites hollow microspheres were prepared by self-propagating high-temperature synthesis self-reactive flame spraying method. The droplets enter in the cooling medium and solidified rapidly so that the gas can not escape to remain holes inside the products. The powder samples were used for characterization. The microstructure and crystal structure were studied by SEM, EDS and XRD. The results show that the obtained particles are hollow microspheres. They are spherical or ellipsoidal shapes from nanometer dimension to several micrometers. The phase structure of composite powders is the
APA, Harvard, Vancouver, ISO, and other styles
50

Zhang, Li, Zhi Li, Huaxing Chu, Qiaolin Chen, Yang Li, and Xinghua Liu. "Design and Evaluation of a Novel Efficient Air-Assisted Hollow-Cone Electrostatic Nozzle." Agriculture 15, no. 12 (2025): 1293. https://doi.org/10.3390/agriculture15121293.

Full text
Abstract:
For crop protection, electrostatic spraying technology significantly improves deposition uniformity and pesticide utilization through the “wraparound-adsorption” effect of charged droplets. However, existing electrostatic nozzles using hydraulic atomization suffer from low charge-to-mass ratios due to unclear principles for optimizing electrode parameters. To this end, this study designs and evaluates a novel air-assisted hydraulic-atomization hollow-cone electrostatic nozzle. First, the air-assisted hollow-cone nozzle was designed. High-speed imaging was then employed to obtain morphological
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography