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Journal articles on the topic 'Vortex devices'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Uss, A. Y., and A. V. Chernyshev. "Classification of Vortex Jet Devices for Gas Flow Control in Pneumo-Hydraulic Systems." Proceedings of Higher Educational Institutions. Маchine Building, no. 07 (724) (July 2020): 43–58. http://dx.doi.org/10.18698/0536-1044-2020-7-43-58.

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This article presents a review and analysis of the literature on the development and study of vortex jet devices that are used as control valves employing the principle of the vortex flow of the working medium. The article discusses vortex valves without mechanically moving parts, as well as semi-mechanical vortex valves. The principle of operation of a vortex jet device is described and, for the first time, a classification of vortex jet devices by a number of structural and functional features is carried out. The analysis of technical solutions identifies the advantages and disadvantages of

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2

DMITRIEVA, O. S., A. V. DMITRIEV, A. N. NIKOLAEV, and G. R. BADRETDINOVA. "FEATURES OF THE USE OF VORTEX DEVICES OF VARIOUS DESIGNS IN INDUSTRY." Herald of Technological University 27, no. 10 (2024): 79–84. https://doi.org/10.55421/1998-7072_2024_27_10_79.

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Vortex type devices play an important role in the intensification of many industrial processes. Introducing vortex-type devices will increase the productivity of technological installations in the chemical industry and related industries, reduce overall dimensions, significantly intensify the processes occurring in the devices, increase process efficiency and product quality. The advantages of using vortex-type devices for particle separation are noted, since they have a high separating capacity, as well as for conducting heat and mass transfer processes, for example, the cooling processes of

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3

Кузнецов, Виктор Иванович, and Олег Алексеевич Шариков. "FIRE EXTINGUISHING METHOD BY MEANS OF VORTEX WATER FIRE EXTINGUISHERS USING THE VORTEX CONFUSER EFFECT." Pozharnaia bezopasnost`, no. 4(109) (December 16, 2022): 55–62. http://dx.doi.org/10.37657/vniipo.pb.2022.109.4.006.

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Предлагается способ пожаротушения с применением вихревых водных огнетушителей: вихревого водного циклонного огнетушителя и вихревого водного смесителя-огнетушителя, работающих на основе вихревого эффекта конфузора. Способ заключается в поглощении вихревым водным огнетушителем одновременно с вихревой водной переработкой в огнетушителе пламени, дыма, частиц окружающей среды и последующем направлении образовавшейся аэрозольной огнетушащей смеси на тушение пламени. Это позволяет сдерживать увеличение площади пожара, а также эффективнее использовать водные ресурсы при его тушении. Приводятся преиму

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Duwel, A. E., H. S. J. van der Zant, and T. P. Orlando. "Discrete underdamped vortex flow devices." IEEE Transactions on Appiled Superconductivity 5, no. 2 (1995): 3357–60. http://dx.doi.org/10.1109/77.403311.

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Ibragimov, Ruslan A., Evgeniy V. Korolev, T. R. Deberdeev, V. V. Leksin, and Denis B. Solovev. "Energy Parameters of the Binder during Activation in the Vortex Layer Apparatus." Materials Science Forum 945 (February 2019): 98–103. http://dx.doi.org/10.4028/www.scientific.net/msf.945.98.

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Improving the efficiency of construction composites is a relevant problem for modern-day material science. One of the ways to solve the problem consists in activating the binders by means of vortex-layer devices. Mathematical transformations produced a formula for calculating the dependency of the number of ferromagnetic-particle collision on the number and velocity of such particles, as well as on the device chamber fill factor. The results obtained by applying the proposed formula differ from D.D. Logvinenko's model by 10% at max. We calculated the impact force, the impulse of the grinding b

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Liu, Houquan, Hongchang Deng, Shijie Deng, Chuanxin Teng, Ming Chen, and Libo Yuan. "Vortex Beam Encoded All-Optical Logic Gates Based on Nano-Ring Plasmonic Antennas." Nanomaterials 9, no. 12 (2019): 1649. http://dx.doi.org/10.3390/nano9121649.

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Vortex beam encoded all-optical logic gates are suggested to be very important in future information processing. However, within current logic devices, only a few are encoded by using vortex beams and, in these devices, some space optical elements with big footprints (mirror, dove prism and pentaprism) are indispensable components, which is not conducive to device integration. In this paper, an integrated vortex beam encoded all-optical logic gate based on a nano-ring plasmonic antenna is proposed. In our scheme, by defining the two circular polarization states of the input vortex beams as the

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Grishin, Boris, Marina Bikunova, Natalya Osipova, and Sergey Salmin. "Efficiency assessment of vortex tubular enameled coalescing devices for oil emulsion destabilization." E3S Web of Conferences 549 (2024): 07005. http://dx.doi.org/10.1051/e3sconf/202454907005.

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The greatest intensity of the process of dispersion and subsequent coalescence of oil droplets in emulsified wastewater of oilfields takes place in the near-wall areas of tubular coalescing devices. Strengthening of the wall effect is possible by covering the surface of the flowing part of the coalescing device with silicate enamel, which provides the effect of sliding of the turbulent flow of waste water (emulsion) on a thin adhesive layer that appears directly on the surface of the enamel. Experimental studies to determine the effectiveness of treatment of oily wastewater in tubular vortex-t

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8

Artyukhov, Artem, Viktor Obodiak, and Pavlo Boiko. "Development of Software for Calculating of the Vortex Fluidized Bed Granulator." Journal of Software Engineering: Theories and Practices 2, no. 1 (2017): 1–10. http://dx.doi.org/10.21174/josetap.v2i1.61.

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The article is devoted to the development of software for calculating the hydrodynamic conditions and kinetic characteristics of granulation process in vortex devices. In the basis software Vortex Granulator© and Classification in vortex flow© original mathematical model for calculating the flow rate of gas and granules classification and separation processes of granules in a vortex granulator, kinetics of granules heating and removing moisture from the granules was put. The structure of software and algorithm of their work is shown. In the article, an algorithm for calculation of the granulat

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9

Uss, A. Yu, and A. V. Chernyshev. "A Vortex Jet Device Applied in the Development of Active Hydro-Pneumatic Dampers Used in Rehabilitation Equipment." Herald of the Bauman Moscow State Technical University. Series Mechanical Engineering, no. 1 (136) (March 2021): 185–204. http://dx.doi.org/10.18698/0236-3941-2021-1-185-204.

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The paper overviews and analyses the current status of the development and research of active hydro-pneumatic dampers, which are used in rehabilitation equipment, where vortex jet devices can be applied as control valves. The study focuses on a vortex jet device whose distinctive feature is the absence of mechanically moving parts, describes the principle of its operation, and gives the rationale for using it in the active hydro-pneumatic damper of the knee module prosthesis. From a review of scientific and technical literature, a conclusion is drawn that active hydro-pneumatic dampers are use

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Pavlenko, Anatoliy, Andrii Cheilytko, Sergii Ilin, and Hanna Karpenko. "Minimization of Energy Consumption of Vortex Devices for Granulation of Materials." Rocznik Ochrona Środowiska 25 (2023): 198–207. http://dx.doi.org/10.54740/ros.2023.019.

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The article considers the possibility of efficient energy and environmental use of vortex devices for the granulation of solids. The factors influencing the energy consumption for generating a vortex flow with dispersed solid inclusions are analysed. A mathematical model for calculating the aerodynamic drag of a vortex apparatus in a clean gas flow, which was used in computer modelling, is presented. The main dependencies for determining the influence of the geometric dimensions of the vortex on its aerodynamic drag are also given. An analytical solution to the problem of minimising the aerody

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Zhou, Xinyi, Zongjie Zhu, Xiangsheng Xie, Lishuang Yao, Fan Fan, and Yaqin Zhou. "Broadband Vortex Beam Modulating System Based on Electrically Controlled Liquid Crystal Devices." Photonics 10, no. 9 (2023): 1012. http://dx.doi.org/10.3390/photonics10091012.

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Vortex beams with helical phase wavefronts have recently emerged as a research hotspot because of their widespread applications such as ultra-high dimensional information encoding, quantum entanglement, and data transmission due to their unique properties. Research, as of yet, on the easy preparation of vector vortex beams is hindered by technical bottlenecks such as large mechanical modulation errors and limited bandwidths of meta-structured devices in spite of the massive experimental and theoretical breakthroughs in the generation of vortex beams that have been made. To make up for the defi

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12

Pastukhov, A. G., and D. N. Bakharev. "Maize Threshing and Separating Device for Primary Seed Production." Agricultural Machinery and Technologies 14, no. 1 (2020): 34–39. http://dx.doi.org/10.22314/2073-7599-2020-14-1-34-39.

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The development of domestic primary maize seed production requires the development of new threshing devices capable to minimize seed grains macro- and microdamage. (Research purpose) To justify the design and technological parameters of the axial-rotary threshing and separating device for varietal and hybrid maize with a device that ensures the cobs orientation in space before threshing and partial violation of their grain structure by friction during swirling by air flow. (Materials and methods) The authors used system analysis methods, ensuring the principle of flow in mechanized lines, buil

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Voinov, Nikolai A., Anastasiya V. Bogatkova, and Denis A. Zemtsov. "Intensification of Heat and Mass Transfer in a Diabatic Column with Vortex Trays." ChemEngineering 6, no. 2 (2022): 29. http://dx.doi.org/10.3390/chemengineering6020029.

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We used vortex contact devices that we developed and investigated to make a new design of an alcohol diabatic distillation column with heat exchange pipes (as the reflux condenser) passing through concentrating section trays. In the column, ascending vapors partially condensed on the surface of vertically installed heat exchange tubes, forming a reflux. The reflux was then mixed with the draining liquid flow in the vortex contact devices placed on the trays. Heat was removed from the column through the boiling of the draining water film along the inner surface of the heat exchange pipes. We co

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14

Yakimushkin, R. V. "VORTEX DEVICES OF THE DIESEL AIR SUPPLY SYSTEM: MATHEMATICAL MODEL OF AERODYNAMIC PROCESSES." Russian Automobile and Highway Industry Journal 17, no. 1 (2020): 110–20. http://dx.doi.org/10.26518/2071-7296-2020-17-1-110-120.

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Introduction. The calculation of effective indicators of the vortex ejector used in the diesel air supply system is a pressing task as it allows significantly reducing time for determination of rational design parameters at the design stage. One of the modifications of the particle dynamics method is a promising direction, allowing with high physical adequacy, “from the first principles,” to model aerodynamic processes in vortex devices. Therefore, the purpose of the paper is to develop a mathematical model of a vortex ejector.Materials and methods. The paper discussed a method of the mathemat

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15

Field, Richard, David Averill, Thomas P. O'Connor, and Paula Steel. "Vortex Separation Technology." Water Quality Research Journal 32, no. 1 (1997): 185–214. http://dx.doi.org/10.2166/wqrj.1997.013.

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Abstract Several types of vortex separators have been developed during the last 30 years. Their major function has been to provide both flow regulation and settleable solids concentration for the control of combined sewer overflows (CSOs). A variety of opinions have developed regarding the application of these technologies, ranging from overwhelming support to reservations of their effectiveness. The performance of vortex devices depends on the settling velocity distribution of the particles in the wastewater. When correctly installed with other controls in combined sewer or separate stormwate

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16

Grigor’yev, Viktor S., and Il’ya V. Romanov. "APPLICATION OF THE VORTEX LAYER APPARATUS FOR MECHANICAL GRINDING OF SUBSTANCES IN A WATER FLOW." Tekhnicheskiy servis mashin 2, no. 143 (2021): 62–70. http://dx.doi.org/10.22314/2618-8287-2021-59-2-62-70.

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With the expansion of the crushing equipment for various substances, the issues of the energy intensity of the process, the duration of grinding, the profitability of the devices with the required quality of grinding are acute. (Research purpose) The research purpose is in justifying the technical solutions for the use of vortex layer apparatuses as activators of the processes of crushing and converting organic agricultural waste during their pre-treatment for further utilization in biogas plants. (Materials and methods) Authors evaluated the efficiency of pretreatment of animal waste in the d

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17

Abdullah, M. Z., Z. Husain, and S. M. Fraser. "Application of Deswirl Device in Cyclone Dust Separator." ASEAN Journal on Science and Technology for Development 20, no. 3&4 (2017): 203–16. http://dx.doi.org/10.29037/ajstd.354.

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The experimental investigations of the vortex flow inside the vortex finder (outlet duct) of the cyclone dust separator have been carried out. Preliminary study from the visualization experiment has been performed and discovered vortex instability inside the conventional vortex finder. In order to minimize the instabilities, the streamlined entry shape was inserted at the vortex finder entrance and the results showed remarkable improvement of the vortex flow instability inside the vortex finder. The velocity measurements of two main components of velocity were performed using a laser-Doppler a

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18

Ivanov, Boris L., Bulat G. Ziganshin, Andrey V. Dmitriev, Maxim A. Lushnov, and Manuel O. Binelo. "Numerical modeling of the effect of energy-separation in the ranque-hilsch tube." BIO Web of Conferences 27 (2020): 00109. http://dx.doi.org/10.1051/bioconf/20202700109.

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Currently, there are a lot of applications of vortex technologies. The vortex effect is used in gasdynamic cold generators and vortex cooling chambers. Vortex devices are also used as dehumidifiers, separators, for cooling and heating hydraulic fluids, separating two-phase media, gas mixtures, evacuating, etc. Scientists study the applicability of vortex equipment for traditional and freeze-drying of agricultural products. However, the influence of geometric parameters of vortex devices on the productivity and energy efficiency of temperature separation of gas flows is poorly studied. Research

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19

Karakeyan, V. I., and A. V. Maltsev. "Vortex flow transducer for ecological monitoring devices." Measurement Techniques 55, no. 7 (2012): 806–12. http://dx.doi.org/10.1007/s11018-012-0043-7.

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20

Bakhronov, Kh Sh, A. A. Akhmatov, Yo B. Kadirov, and Kh Kh Suyarova. "AN EXPERIMENTAL STUDY OF THE EFFECTIVENESS OF VORTEX APPARATUS FOR REGENERATIVE EXTRACTION OF SODIUM CYANIDE FROM SPENT SOLUTIONS." Journal of Science and Innovative Development 3, no. 5 (2020): 86–92. http://dx.doi.org/10.36522/2181-9637-2020-5-10.

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The article presents the results of the study on the effectiveness of the use of vortex apparatuses for the regenerative extraction of sodium cyanide from spent solutions. The authors emphasize the main advantages and factors explaining the higher efficiency of vortex devices compared with traditional technologies for the regeneration of NaCN from spent solutions. The study also highlights the results of experiments according to which the average volumetric conversion rate of the starting compounds is 40-60 times higher than in conventional bubble columns, which clearly shows the advantage of

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21

Liu, Zhengyuan, Bingcheng Luo, Labao Zhang, Boyu Hou, and Danyang Wang. "Vortex dynamics in amorphous MoSi superconducting thin films." Superconductor Science and Technology 34, no. 12 (2021): 125014. http://dx.doi.org/10.1088/1361-6668/ac2eb0.

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Abstract Vortex dynamics in superconductors have received a great deal of attention from both fundamental and applied researchers over the past few decades. Because of their critical role in the energy relaxation process of type-II superconductors, vortex dynamics have been deemed a key factor for the emerging superconducting devices, but the effect of irradiation on vortex dynamics remains unclear. With the support of electrical transport measurements under external magnetic fields and irradiation, the photon effect on vortex dynamics in amorphous MoSi (a-MoSi) superconducting thin films is i

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Hwang, Peter H., Rachel J. Woo, and Karen J. Fong. "Intranasal Deposition of Nebulized Saline: A Radionuclide Distribution Study." American Journal of Rhinology 20, no. 3 (2006): 255–61. http://dx.doi.org/10.2500/ajr.2006.20.2861.

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Background Despite the popularity of various nasal sprays and nebulizers, there are limited data regarding the anatomic distribution of particles generated by these devices. This pilot study sought to characterize distribution patterns of nebulized and sprayed saline particles in normal subjects and postsurgical sinus patients. Methods Fifteen subjects were studied in three trials: metered-dose nasal spray bottle versus vortex-propelled nebulizer in normal subjects, passive-diffusion nebulizer versus vortex nebulizer in normal subjects, and passive nebulizer versus vortex nebulizer in postsurg

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NIKOLAEV, A. N., O. S. DMITRIEVA, and V. V. KHARKOV. "DROPLET SIZE DISTRIBUTION IN ROTATING DROPLET LAYER OF VORTEX SEPARATION DEVICE." Herald of Technological University 27, no. 6 (2024): 90–93. http://dx.doi.org/10.55421/1998-7072_2024_27_6_90.

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In order for the extracted natural gas to meet the regulatory requirements imposed on it, it must be cleaned of the liquid phase before being supplied to the transport pipeline. There are numerous technical methods to achieve the separation of gas and liquid - gravitational, inertial, filtration, and centrifugal separation. Using vortex effects will ensure the highest efficiency of the separation of dispersed particles. The aim of this work is to determine the main factors influencing the dispersed composition of droplets in a rotating droplet layer of a separator with a tangent swirler. The e

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Dowling, A. P. "The effect of large-eddy breakup devices on oncoming vorticity." Journal of Fluid Mechanics 160 (November 1985): 447–63. http://dx.doi.org/10.1017/s002211208500355x.

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Experiments have shown that a large-eddy breakup device consisting of a short splitter plate placed in the turbulent boundary layer over a plane wall can lead to a reduction in drag. We investigate the idealized problem of an incident line vortex convected past such a device. The vorticity shed from the trailing edge of the plate is found to cancel the effect of the incident vortex and to reduce velocity fluctuations significantly in the vicinity of the wall.

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Feng, Xin-di, Yin Wang, Li-juan Shi, et al. "Mode converter of vortex beams by phase-gradient acoustic metagratings." Journal of Applied Physics 133, no. 3 (2023): 034502. http://dx.doi.org/10.1063/5.0130015.

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Recently, acoustic vortices with orbital angular momentum (OAM) have attracted great attention and interest owing to their extensive applications. Based on the generalized Snell’s law (GSL), acoustic vortex beams can be observed by constructing different types of acoustic metasurfaces immersed into cylindrical waveguides. However, owing to the restrictions of the phase gradient of metasurface structures and the critical order of propagating vortex beams, there exist great challenges in realizing complex modulation of vortex beams and designing advanced multifunctional sound devices. Here, we t

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Galera, L., P. Martinez-Filgueira, U. Fernández-Gámiz, E. Zulueta, JM Lopez, and JM Blanco. "A triangular vortex generator modeling on a DU97-W-300 airfoil by a source term model." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 233, no. 5 (2019): 635–45. http://dx.doi.org/10.1177/0957650919850449.

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Vortex generators are passive devices employed to improve the aerodynamic performance of aircraft and wind turbine blades. More concretely, these devices have high potential in improving the power output of wind turbines that are producing less power than expected. Besides, it can improve the aerodynamic performance of the nearest parts to the rotor of turbine blades that usually enter in stall. The main goal of this article is to model the triangular vortex generator effect on a DU97-W-300 airfoil by a source term model. This is aimed by comparing the lift and drag coefficients from experimen

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Ostroukhov, N. N., and E. V. Chumakova. "ENGINEERING AND MODELING OF OPTIMAL MANEUVERING OF VESSELS WITH VORTEX PROPULSION UNITS." World of Transport and Transportation 15, no. 5 (2017): 14–27. http://dx.doi.org/10.30932/1992-3252-2017-15-5-2.

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[For the English abstract and full text of the article please see the attached PDF-File (English version follows Russian version)].ABSTRACT The paper proposes a schematic diagram of an additional device for vortex propulsion units of vessels and algorithms for computer simulation of their use for various maneuvering options. The paper describes the advantages of vessels with propulsion units in the form of generators of vortex pairs, including toroidal vortices (thermals), the efficiency of propulsion units of which increases with the increase in their dimensions. A comprehensive analysis of t

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Сёмин, Дмитрий Александрович, Андрей Сергеевич Роговой, Артем Николаевич Левашов, and Ярослав Николаевич Левашов. "VERIFICATION OF FLOW IN THE VORTEX CHAMBER DEVICES." Journal of Mechanical Engineering the National Technical University of Ukraine "Kyiv Polytechnic Institute" 2, no. 77 (2016): 71–78. http://dx.doi.org/10.20535/2305-9001.2016.77.74796.

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Jiang, Ye, Yu Cao, and Xue Feng. "Progress in integrated devices for optical vortex emission." Journal of Physics D: Applied Physics 53, no. 30 (2020): 303002. http://dx.doi.org/10.1088/1361-6463/ab84a4.

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Li, Zhi-Xiang, Ya-Ping Ruan, Peng Chen, et al. "Liquid crystal devices for vector vortex beams manipulation and quantum information applications [Invited]." Chinese Optics Letters 19, no. 11 (2021): 112601. http://dx.doi.org/10.3788/col202119.112601.

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Khabarova, D. F., A. R. Ismagilov, A. V. Podzerko, and I. I. Lazarev. "Experimental study of a vortex-type shut-off device." Bulletin of the South Ural State University series "Mechanical engineering industry" 23, no. 4 (2023): 80–90. http://dx.doi.org/10.14529/engin230407.

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Modern technologies for obtaining materials include chemical reactions occurring at excess pressure and high temperatures accompanied by phase transitions. Such processes take place in devices for sulfuric acid production, heterogeneous catalysis and chemical synthesis, in devices for drying, burning and melting bulk materials and other furnaces. The technological processes under consideration are accompanied by the loading of bulk material into the internal cavity of the apparatus – the reactor. In this case, the material loading window is sealed by a mechanical locking device which opens at

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Abramkina, D. V., A. O. Ivanova, D. F. Karpov, Kh M. Vafaeva, and A. S. Voronov. "Analysis of air flow formation in a nozzle valve." Herald of Dagestan State Technical University. Technical Sciences 51, no. 4 (2025): 171–78. https://doi.org/10.21822/2073-6185-2024-51-4-171-178.

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Objective. To accurately assess the impact of ventilation systems on the acoustic environment of a room, it is necessary to determine the length of the vortex zone that forms as the air flow passes through throttling devices. The article examines the results of modeling a nozzle valve with a variable cross-section during its opening and closing processes. Method. The analysis of airflow formation scenarios at various positions of the control diaphragm was performed using Computational Fluid Dynamics (CFD) in the Ansys Fluent software package. Result. As the cross-sectional flow area decreases,

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Jiang, Wenkai, Sen Wang, Xinhua Yang, and Junsheng Yang. "Effect of Aspect Ratio of Ferroelectric Nanofilms on Polarization Vortex Stability under Uniaxial Tension or Compression." Materials 16, no. 24 (2023): 7699. http://dx.doi.org/10.3390/ma16247699.

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Mastering the variations in the stability of a polarization vortex is fundamental for the development of ferroelectric devices based on polarization vortex domain structures. Some phase field simulations were conducted on PbTiO3 nanofilms with an initial polarization vortex under uniaxial tension or compression to investigate the conditions of vortex instability and the effects of aspect ratio of nanofilms and temperature on them. The instability of a polarization vortex is strongly dependent on aspect ratio and temperature. The critical compressive stress increases with decreasing aspect rati

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Biryuk, V. V., S. V. Lukachev, V. T. Volov, and Sh A. Pirallishvili. "Professor A.P. Merkulov’ role in the process of research and development of the vortex effect." VESTNIK of Samara University. Aerospace and Mechanical Engineering 20, no. 2 (2021): 105–21. http://dx.doi.org/10.18287/2541-7533-2021-20-2-105-121.

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The article is prepared for the centenary of the birth of Alexander Petrovich Merkulov. The stages of creating the theoretical basis of the vortex effect of energy separation of gases (the hypothesis of vortex interaction), and the creation and implementation of vortex devices based on the use of the vortex effect for aviation and medicine are considered. The role of Professor A.P. Merkulov in the study of characteristic features of the energy separation process in vortex tubes and practical application of the vortex effect in the USSR is shown. The works of ONIL-9 (KuAI-SGAU) headed by Alexan

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Wang, Wei, Ruikang Zhao, Shilong Chang, et al. "High-Efficiency Spin-Related Vortex Metalenses." Nanomaterials 11, no. 6 (2021): 1485. http://dx.doi.org/10.3390/nano11061485.

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In this paper, one spin-selected vortex metalens composed of silicon nanobricks is designed and numerically investigated at the mid-infrared band, which can produce vortex beams with different topological charges and achieve different spin lights simultaneously. Another type of spin-independent vortex metalens is also designed, which can focus the vortex beams with the same topological charge at the same position for different spin lights, respectively. Both of the two vortex metalenses can achieve high-efficiency focusing for different spin lights. In addition, the spin-to-orbital angular mom

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Delgado-Álvarez, J. A., J. G. Perea-Zurita, A. Antonio-Morales, C. González-Rivera, and M. A. Ramírez-Argáez. "Mathematical modeling of the fluid flow in a mixing device for melting/dissolving solid particles in a liquid alloy." MRS Proceedings 1611 (2014): 19–24. http://dx.doi.org/10.1557/opl.2014.752.

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ABSTRACTA study of the fluid flow in a mixing device proposed to dissolve alloying elements in iron baths is performed through a mathematical model in order to predict the best operating conditions for a proper melting/dissolution of solid alloying particles. The mathematical model consists in the mass and momentum conservation equations (continuity and Turbulent Navier-Stokes equations), and the standard two k-epsilon turbulence model. The model is numerically solved in transient regime with the Volume of Fluid algorithm (VOF) to calculate the vortex shape. VOF is built-in the CFD (Computatio

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Filali, E. G., J. M. Michel, S. Hattori, and S. Fujikawa. "The Cavermod Device: Force Measurements." Journal of Fluids Engineering 121, no. 2 (1999): 312–17. http://dx.doi.org/10.1115/1.2822209.

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The Cavermod device, as described in the companion paper (Filali et al., 1999), allows us to produce the axial collapse of a cavitating vortex at high velocities. From a global point of view, we can consider that it produces a high momentum in the axial direction. Large forces, concentrated on a small area and able to produce erosion pits on hard materials, result from the sudden momentum stopping against a solid wall. In this paper, the results of the forces measurements are given. Four different measurements devices are used to analyze the Cavermod performance in both cases of long and short

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Mielczarek, Szymon, and Jerzy M. Sawicki. "Model of Pressure Distribution in Vortex Flow Controls." Archives of Hydro-Engineering and Environmental Mechanics 62, no. 1-2 (2015): 41–52. http://dx.doi.org/10.1515/heem-2015-0018.

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AbstractVortex valves belong to the category of hydrodynamic flow controls. They are important and theoretically interesting devices, so complex from hydraulic point of view, that probably for this reason none rational concept of their operation has been proposed so far. In consequence, functioning of vortex valves is described by CFD-methods (computer-aided simulation of technical objects) or by means of simple empirical relations (using discharge coefficient or hydraulic loss coefficient). Such rational model of the considered device is proposed in the paper. It has a simple algebraic form,

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Li, Yong, Junrong Wang, Hui Ji, Ouyang Li, and Songlin Nie. "Numerical Simulation Analysis of Main Structural Parameters of Hydrocyclones on Oil-Gas Separation Effect." Processes 8, no. 12 (2020): 1624. http://dx.doi.org/10.3390/pr8121624.

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Gas pollution in marine lubricating oil systems is harmful to the normal operation of a ship, and is one of the main reasons for the decline of the performance of lubricating oil. In this research, a classic 75 mm hydrocyclone was selected as the oil–gas separation device. A hydrocyclone is a device that uses the density difference of the two-phase flow to separate the dispersed phase in the centrifugal force field. Compared with ordinary active oil–gas separators, hydrocyclones do not require additional power devices. After establishing the physical model of the hydrocyclone, the distribution

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Sokolovska, I., and K. Demin. "FEATURES OF MODELING THE TRACTION OF MOVEMENT OF MATERIAL PARTICLES IN A VORTICAL LAYER." Collection of scholarly papers of Dniprovsk State Technical University (Technical Sciences) 1, no. 38 (2021): 99–105. http://dx.doi.org/10.31319/2519-2884.38.2021.12.

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In the given article the actual modern scientific problem is solved — on the basis of experimental data the mathematical model of movement of a particle in a vortex layer at heat treatment taking into account multiphase of a stream is created. At the current level of development of vortex devices, the relevance of research aimed at in-depth study of processes, improvement of structures and manufacturing technology of individual components has increased. The lack of a strict theory is felt most acutely in the design of systems and installations in which the vortex apparatus is one of the

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Rogovyi, Andrii, Artem Neskorozhenyi, Serhiy Lukianets, and Oleksandr Shudryk. "Comparison of the Vortex Chamber Supercharger Characteristics for Grain Pumping with Other Types Superchargers." Bulletin of Kharkov National Automobile and Highway University 1, no. 101 (2023): 104. http://dx.doi.org/10.30977/bul.2219-5548.2023.101.0.104.

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Problem. Among the superchargers used in pneumatic transport, jet pumps have the best reliability and durability indicators. However, their use in these systems is limited due to the large specific energy consumption indicators for pumping. Vortex chamber superchargers allow to increase the pressure of the medium at the outlet of the pump, in comparison with classic direct-flow jet pumps, but their characteristics during operation in undrained mode have not yet been investigated. Goal. The goal of this work is to analyze the characteristics of vortex chamber superchargers for pumping grain and

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Voinov, Nikolai Alexandrovich, Aleksandr Sergeyevich Frolov, Anastasiya Viktorovna Bogatkova, Denis Andreyevich Zemtsov, and Ol'ga Petrovna Zhukova. "IMPROVEMENT OF CONTACT DEVICES OF THE BUBBLING TRAY." chemistry of plant raw material, no. 4 (December 15, 2022): 343–51. http://dx.doi.org/10.14258/jcprm.20220411381.

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The results of a study of hydrodynamics and mass transfer on bubbling-type trays with valve, valve-vortex and vortex contact devices are presented. By means of experimental studies and numerical modeling, the velocity fields of liquid and gas, as well as the structure of the gas-liquid layer on the tray are determined. The dependence of the relative amplitude of fluctuations in the level of the gas-liquid layer on the tray by the gas flow rate when placing various types of contact devices on it is obtained. The average surface diameter of gas bubbles is determined and the mechanism of their ac

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Granata, V., B. A. Davidson, E. Sarnelli, and S. Pagano. "Three Terminal HTc Vortex Flow Transistors: Optimisation of the Device Geometry Employing Bicrystal Grain-Boundary Josephson Junctions." International Journal of Modern Physics B 13, no. 09n10 (1999): 1253–58. http://dx.doi.org/10.1142/s0217979299001260.

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We have numerically studied the static and dynamic behavior of a three terminal vortex-flow transistor based on a parallel array of Josephson junctions. We explicitly show advantages and disadvantages for different device geometric configurations, systematically changing the symmetry of the bias-current distribution. Using parameters typical of high-temperature superconducting junctions at 77K, we have analysed for each configuration the dependence of the critical current on the control current, and the voltage-current curves. We have calculated gain and transresistance for different bias cond

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Palm, Marius L., Chaoxin Ding, William S. Huxter, Takashi Taniguchi, Kenji Watanabe, and Christian L. Degen. "Observation of current whirlpools in graphene at room temperature." Science 384, no. 6694 (2024): 465–69. http://dx.doi.org/10.1126/science.adj2167.

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Electron–electron interactions in high-mobility conductors can give rise to transport signatures resembling those described by classical hydrodynamics. Using a nanoscale scanning magnetometer, we imaged a distinctive hydrodynamic transport pattern—stationary current vortices—in a monolayer graphene device at room temperature. By measuring devices with increasing characteristic size, we observed the disappearance of the current vortex and thus verified a prediction of the hydrodynamic model. We further observed that vortex flow is present for both hole- and electron-dominated transport regimes

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Fu, Ben, Shi-Xing Yu, Na Kou, Zhao Ding, and Zheng-Ping Zhang. "Design of cylindrical conformal transmitted metasurface for orbital angular momentum vortex wave generation." Chinese Physics B 31, no. 4 (2022): 040703. http://dx.doi.org/10.1088/1674-1056/ac3a65.

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We propose a cylindrical conformal transmitted metasurface for orbital angular momentum vortex wave generation. Formulas for calculating the phase distributions of cylindrical conformal transmitted metasurface is presented. A prototype of the proposed conformal transmitted metasurface is designed, fabricated and measured. Measured results shows that the proposed conformal transmitted metasurface can effectively generate vortex waves, which verifies the effectiveness of our method. The proposed method may pave the way of vortex wave generation with cylindrical conformal devices.

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LaRocco, John, Qudsia Tahmina, Stanley Essel, and John Simonis. "Firefighting with Conductive Aerosol-Assisted Vortex Rings." Technologies 13, no. 1 (2024): 10. https://doi.org/10.3390/technologies13010010.

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Conventional firefighting tools and methods can strain water sources, require toxic foams, or rely on pre-installed countermeasures. A low-cost, non-toxic, and portable option was previously overlooked in portable devices: electrically assisted “ionic wind” fire suppression. Conductive aerosols, carried by vortex rings, can potentially extend the length of an electric arc and suppress fires. After the simulation, two prototype vortex ring launchers were compared, one using compressed air and another using an elastic diaphragm. The efficiency of each test case was assessed with a purpose-built

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Moskalev, L. N. "Gas-dynamic resistance in the swirling zone of the vortex apparatus gas flow." E3S Web of Conferences 592 (2024): 04016. http://dx.doi.org/10.1051/e3sconf/202459204016.

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At the end of the twentieth and beginning of the twenty-first century, almost all national policies in the world are oriented towards environmental problems. Therefore, environmental policy is aimed at reducing the consumption of various resources and reducing harmful emissions into the environment. This is especially true for dusts, which can be formed at almost all enterprises. One of the ways to improve environmental safety from gaseous, solid and liquid emissions from the production of various types and types of products in chemistry, petrochemistry and refining is modernization. Such mode

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Qiang, Xu, Peng Wang, and Yingzheng Liu. "Aeroacoustic simulation of transient vortex dynamics inside double-degree-of-freedom orifice-cavity structure subjected to high-intensity acoustic waves." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 6 (2023): 2292–301. http://dx.doi.org/10.3397/in_2023_0338.

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As a noise reduction device commonly used for aero-engines at present, the double-degree-of-freedom acoustic liner has the advantage of broadband noise elimination, which is related to the energy transformation during the process of vortex generation and shedding from its dual orifice-cavity unit when subjected to high-intensity acoustic waves. Based on the compressible linear Navier-Stokes equations with the influence of nonlinear thermo-viscous acoustics, this study simulated the three-dimensional acoustic-vortex coupling field of dual orifice-cavity structures with different orifices' dista

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Inna, Pitak, Shaporev Valery, Briankin Serhii, Komarysta Bohdana, and Nechyporenko Dmytro. "DEVELOPMENT OF A HIGHLY EFFICIENT COMBINED APPARATUS (A COMBINATION OF VORTEX CHAMBERS WITH A BIN) FOR DRY DEDUSTING OF GASES." Eastern-European Journal of Enterprise Technologies 3, no. 10(99) (2019): 49–55. https://doi.org/10.15587/1729-4061.2019.170134.

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The use of dust collectors of a new type which combines the operation principle of centrifugal and louver-vortex apparatuses was considered. The use of a heterogeneous reactor for gas-solid systems with two streams in a cyclone, a direct-flow cyclone with a chamber of a preliminary collision of gas-dust flows, as well as improved designs of vortex chambers was considered. A combined dust collector was presented in a form of the Rankine vortex tube in combination with a bin in which louver-vortex devices are installed. The combined deduster under study provides an organized supply of a gas-disp

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Naletov, V. A., M. B. Glebov, and L. V. Ravichev. "Analysis of the Oil Flowing Process on the Basis of von Kármán Vortex Streets." Теоретические основы химической технологии 57, no. 6 (2023): 661–67. http://dx.doi.org/10.31857/s0040357123060167.

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In this paper, the local vortex flows of oil transported through main product pipelines are analyzed on the basis of von Kármán vortex streets. The vortex flow analysis is based on the modeling of hydrodynamics by the Ansys Fluent software package. The simulation of local vortex flows is based on the shear-stress transport (SST) model, representing a combination of two k–ε and k–ω turbulence models. It is proven that, at specified oil-flow parameters and characteristics, it is possible to organize local vortex flows in the centerof a pipeline. The estimation of hydraulic drags in the zone of t

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