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Journal articles on the topic 'Gas channels'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Gruznov, Vladimir M., and Alexander B. Vorozhtsov. "Gas-Dynamic Kinetics of Vapour Sampling in the Detection of Explosives." Molecules 24, no. 23 (2019): 4409. http://dx.doi.org/10.3390/molecules24234409.

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The dynamic sorption concentration of explosive vapours on concentrators made of a metal mesh, and the transportation of explosive vapours through the extended metal channels are considered. The efficiency of the concentration and transportation is determined by the breakthrough of the substance’s molecules through the channels. The research methods we used were breakthrough calculation theory and experiment. When calculating the breakthrough, a mesh was presented as a set of parallel identical channels. Wire mesh and extended channels were made of stainless steel. The breakthrough is determin

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2

Walewska, Agnieszka, Adam Szewczyk, and Piotr Koprowski. "Gas Signaling Molecules and Mitochondrial Potassium Channels." International Journal of Molecular Sciences 19, no. 10 (2018): 3227. http://dx.doi.org/10.3390/ijms19103227.

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Recently, gaseous signaling molecules, such as carbon monoxide (CO), nitric oxide (NO), and hydrogen sulfide (H2S), which were previously considered to be highly toxic, have been of increasing interest due to their beneficial effects at low concentrations. These so-called gasotransmitters affect many cellular processes, such as apoptosis, proliferation, cytoprotection, oxygen sensing, ATP synthesis, and cellular respiration. It is thought that mitochondria, specifically their respiratory complexes, constitute an important target for these gases. On the other hand, increasing evidence of a cyto

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Похабов, Д. А., А. Г. Погосов, Е. Ю. Жданов, А. К. Бакаров та А. А. Шкляев. "Двухканальный электронный транспорт в подвешенных квантовых точечных контактах с боковыми затворами". Физика и техника полупроводников 54, № 12 (2020): 1344. http://dx.doi.org/10.21883/ftp.2020.12.50235.9512.

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The conductance of a suspended quantum point contact fabricated from GaAs/AlGaAs heterostructures with a two-dimensional electron gas, equipped with the in-plane side gates separated from the constriction using lithographical trenches, is studied. The conductance as a function of the gate voltages demonstrates unusual double-channel regime with independent channel’s conductance quantization: two side gates can drive the conductance of the separate channels independently. A possible electrostatic mechanism of the double-channel structure formation inside a single constriction is connected with

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4

Offermans, Peter, Roman Vitushinsky, Mercedes Crego-Calama, and Sywert H. Brongersma. "Gas Sensing with AlGaN/GaN 2DEG Channels." Procedia Engineering 25 (2011): 1417–20. http://dx.doi.org/10.1016/j.proeng.2011.12.350.

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5

Schneider, I. A., D. Kramer, A. Wokaun, and G. G. Scherer. "Oscillations in Gas Channels." Journal of The Electrochemical Society 154, no. 8 (2007): B770. http://dx.doi.org/10.1149/1.2742291.

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Schneider, I. A., S. A. Freunberger, D. Kramer, A. Wokaun, and G. G. Scherer. "Oscillations in Gas Channels." Journal of The Electrochemical Society 154, no. 4 (2007): B383. http://dx.doi.org/10.1149/1.2435706.

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7

Herrera, Marcela, and Jeffrey L. Garvin. "Aquaporins as gas channels." Pflügers Archiv - European Journal of Physiology 462, no. 4 (2011): 623–30. http://dx.doi.org/10.1007/s00424-011-1002-x.

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8

Szwast, Maciej, and Zbigniew Szwast. "A Mathematical Model of Membrane Gas Separation with Energy Transfer by Molecules of Gas Flowing in a Channel to Molecules Penetrating this Channel from the Adjacent Channel." Chemical and Process Engineering 36, no. 2 (2015): 151–69. http://dx.doi.org/10.1515/cpe-2015-0012.

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Abstract The paper presents the mathematical modelling of selected isothermal separation processes of gaseous mixtures, taking place in plants using membranes, in particular nonporous polymer membranes. The modelling concerns membrane modules consisting of two channels - the feeding and the permeate channels. Different shapes of the channels cross-section were taken into account. Consideration was given to co-current and counter-current flows, for feeding and permeate streams, respectively, flowing together with the inert gas receiving permeate. In the proposed mathematical model it was consid

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9

Alexiadis, A., M. P. Dudukovic, P. Ramachandran, A. Cornell, J. Wanngård, and A. Bokkers. "The Flow Pattern in Single and Multiple Submerged Channels with Gas Evolution at the Electrodes." International Journal of Chemical Engineering 2012 (2012): 1–9. http://dx.doi.org/10.1155/2012/392613.

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We show that the gas-liquid flow pattern in a single gas-evolving electrochemical channel can be remarkably different from the flow pattern in multiple submerged gas-evolving electrochemical channels. This is due to the fact that in a single channel there is a higher accumulation of small bubbles and these can considerably affect the liquid velocity pattern which in turn may affect the performance of a cell. Since experimental work is often carried out in single channels, while industrial applications almost always involve multiple channels, this study provides insight into the factors that af

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Bantel, Carsten, Mervyn Maze, and Stefan Trapp. "Noble Gas Xenon Is a Novel Adenosine Triphosphate-sensitive Potassium Channel Opener." Anesthesiology 112, no. 3 (2010): 623–30. http://dx.doi.org/10.1097/aln.0b013e3181cf894a.

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Background Adenosine triphosphate-sensitive potassium (KATP) channels in brain are involved in neuroprotective mechanisms. Pharmacologic activation of these channels is seen as beneficial, but clinical exploitation by using classic K channel openers is hampered by their inability to cross the blood-brain barrier. This is different with the inhalational anesthetic xenon, which recently has been suggested to activate KATP channels; it partitions freely into the brain. Methods To evaluate the type and mechanism of interaction of xenon with neuronal-type KATP channels, these channels, consisting o

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11

Burmistrov, A. V., S. I. Salikeev, and A. A. Raykov. "Simulation of Gas Flow in Channels with Variable Cross-Section at Different Flow Modes using Lattice Boltzmann Method (LBM)." Herald of the Bauman Moscow State Technical University. Series Mechanical Engineering, no. 6 (129) (December 2019): 105–15. http://dx.doi.org/10.18698/0236-3941-2019-6-105-115.

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All contact-free vacuum pumps operate in a very wide pressure range. Therefore, the calculation of flows through the slot channels is associated with the need to take into account the laws of all three modes of gas flow: viscous, transitional and molecular. Most of channels of contact-free pumps are formed by curved walls, which are slits of variable cross-section in the direction of gas flow, having a minimum gap in some place. The paper considers the basic methods of calculating flows in channels of variable cross-section: the Monte Carlo method for molecular mode, the numerical solution of

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12

Boron, Walter F. "Sharpey-Schafer Lecture: Gas channels." Experimental Physiology 95, no. 12 (2010): 1107–30. http://dx.doi.org/10.1113/expphysiol.2010.055244.

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13

Harley, John C., Yufeng Huang, Haim H. Bau, and Jay N. Zemel. "Gas flow in micro-channels." Journal of Fluid Mechanics 284 (February 10, 1995): 257–74. http://dx.doi.org/10.1017/s0022112095000358.

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An experimental and theoretical investigation of low Reynolds number, high subsonic Mach number, compressible gas flow in channels is presented. Nitrogen, helium, and argon gases were used. The channels were microfabricated on silicon wafers and were typically 100 μm wide, 104 μm long, and ranged in depth from 0.5 to 20 μm. The Knudsen number ranged from 10-3 to 0.4. The measured friction factor was in good agreement with theoretical predictions assuming isothermal, locally fully developed, first-order, slip flow.

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14

TAUSCHWITZ, A., R. BIRKNER, R. KNOBLOCH, et al. "Stability of gas discharge channels for final beam transport." Laser and Particle Beams 20, no. 3 (2002): 503–9. http://dx.doi.org/10.1017/s0263034602203286.

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Discharge plasma channels have been investigated in recent years at Gesellschaft für Schwerionenforschung–Darmstadt (GSI) and at the Lawrence Berkeley National Laboratory in Berkeley, California, in a number of experiments. A short summary of the experimental work at Berkeley and GSI is given. Different initiation mechanisms for gas discharges of up to 60 kA were studied and compared. In the Berkeley experiments, laser ionization of organic vapors in a buffer gas was used to initiate and direct the discharge while at GSI, laser gas heating and ion-beam-induced gas ionization were tested as ini

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15

Bisht, Kamal S., and Michael E. Dreyer. "Phase Separation in Porous Media Integrated Capillary Channels." Microgravity Science and Technology 32, no. 6 (2020): 1001–18. http://dx.doi.org/10.1007/s12217-020-09828-6.

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Abstract Phase separation in space is critical for gas-free propellant supply, life support systems, refueling of spacecraft in low earth orbit (LEO), and for deep space exploration missions. In the absence of gravity, the stability of the liquid-gas interface depends on capillary forces. High liquid flow rates, sudden accelerations, and vibrational disturbances can cause the free surface of the liquid to collapse, which results in the ingestion of gas. Propellant tanks may have screen channel liquid acquisition devices (SCLADs) to position and maintain a gas-free propellant supply to the outl

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16

Jazaeri, Mohammad Javad, and John Andrews. "Design and Testing of a Modified Parallel Flow Field for Uniform Flow Distribution in PEMFuel Cells." Applied Mechanics and Materials 330 (June 2013): 693–97. http://dx.doi.org/10.4028/www.scientific.net/amm.330.693.

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The focus of this paper is to develop and test a modified design of the conventional parallel flow channel configuration in a proton exchange membrane (PEM) fuel cell. One of the main objectives in designing flow channel configurations is to achieve a uniform distribution of reactants across the catalyst layer of the membrane electrode assembly of the fuel cell. Uniform reactant distribution promotes an even current density distribution, and enhances power output and overall cell performance. A simple method for visualizing the flow distribution is used to study the flow distribution in the fl

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17

Zamashchikov, V. V., Ya V. Kozlov, A. A. Korzhavin, and V. S. Babkin. "Gas combustion in narrow single channels." Combustion, Explosion, and Shock Waves 46, no. 2 (2010): 154–61. http://dx.doi.org/10.1007/s10573-010-0024-6.

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18

Chen, C. K., L. Wang, J. T. Yang, and L. T. Chen. "Experimental and Computational Analysis of Periodic Flow Structure in Oscillatory Gas Flow Meters." Journal of Mechanics 22, no. 2 (2006): 137–44. http://dx.doi.org/10.1017/s1727719100004433.

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AbstractThe oscillatory characteristics and dynamic structure of periodic flow in an oscillatory gas flow meter were studied experimentally and numerically. The flow oscillations were triggered by the Coanda effect and an universal correlation between Strouhal number and Reynolds number, Str = 1.09 × 10−3 for ReHD >800, was deduced based on spectral analysis of the pressure fluctuations in the flow channel. Numerical simulation indicated that the evolution of the flow patterns was classified into stages of induction and sustainable periodic oscillation. The transformation between the two st

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19

Munte, Annes, and Hendra Jonathan Sibarani. "Pengaruh saluran distribusi, keunggulan produk, dan persediaan produk, melalui keputusan pembelian pada PT. Tasya Gasindo Medan." Jurnal Paradigma Ekonomika 16, no. 1 (2021): 109–22. http://dx.doi.org/10.22437/jpe.v16i1.12084.

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Natural gas is used by the public because it is more efficient and cheaper than others. but the 3 kg gas cylinder often leaks, the weight of the gas cylinder is not as expected, then the 3kg gas cylinder is often empty of stock. this study aims to determine the effect of distribution channels, product advantages, and product supplies through purchasing decisions. This type of research uses descriptive research. The research aims to determine the effect of distribution channels, product advantages, and product supplies through purchasing decisions. The population in the company as many as 70 an

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20

Bao, Fubing, Zhihong Mao, and Limin Qiu. "Study of gaseous velocity slip in nano-channel using molecular dynamics simulation." International Journal of Numerical Methods for Heat & Fluid Flow 24, no. 6 (2014): 1338–47. http://dx.doi.org/10.1108/hff-04-2013-0145.

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Purpose – The purpose of this paper is to investigate the gas flow characteristics in near wall region and the velocity slip phenomenon on the wall in nano-channels based on the molecular dynamics simulation. Design/methodology/approach – An external gravity force was employed to drive the flow. The density and velocity profiles across the channel, and the velocity slip on the wall were studied, considering different gas temperatures and gas-solid interaction strengths. Findings – The simulation results demonstrate that a single layer of gas molecules is adsorbed on wall surface. The density o

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21

Milanovic, Sasa, Milos Jovanovic, Boban Nikolic, and Vladislav Blagojevic. "The influence of secondary flow in a two-phase gas-solid system in straight channels with a non-circular cross-section." Thermal Science 20, suppl. 5 (2016): 1419–34. http://dx.doi.org/10.2298/tsci16s5419m.

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The paper considers two-phase gas-solid turbulent flow of pneumatic transport in straight horizontal channels with a non-circular cross-section. During turbulent flow, a specific flow phenomenon, known as secondary flow, occurs in these channels in the cross-sectional plane. The existence of strong temperature gradients in the cross-sectional plane of the channel or the cases of curved channels result in the appearance of the secondary flow of the first kind. However, in straight channels with a non-circular cross-section, in the developed turbulent flow mode, a secondary flow, known as Prandt

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22

Wu, Zisen, Pingchuan Dong, Gang Lei, et al. "Study on the micro-scale effect in the micro–nano organic pores of a shale reservoir." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 3 (2017): 491–501. http://dx.doi.org/10.1177/0954406217729718.

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The micro-scale effect occurs because of the gas flows in shale reservoirs containing small organic pores. In this study, based on a lattice Boltzmann model incorporating the bounce-back and specular-reflection boundary conditions, the gas flow through two parallel plates driven by differential pressures is simulated, which in turn verifies the model. Considering the effects of the slippage, surface diffusion, and adsorption, the gas flow in the organic channels is simulated based on the proposed lattice Boltzmann model. It is shown that the micro-scale effect is significant in the gas flows i

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23

Chlebnikovas, Aleksandras, and Pranas Baltrėnas. "Research of the Aerodynamic Parameters in a Special Cyclone with Secondary Inlets." Mokslas - Lietuvos ateitis 9, no. 4 (2017): 400–405. http://dx.doi.org/10.3846/mla.2017.1065.

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Special cyclone – gas treatment device which can be applied to remove the fine particulate matter bigger than 2 micrometres from aggressive gas flow at a temperature of 50–145 °C and a relative humidity of more than 95% and can be achieved the cleaning efficiency over 90%. Cyclone work is based on centrifugal forces and the resulting additional filtration process operation. Cyclone structure equipped with primary and secondary gas flow inflows through which gas dispersed flow is supplied parallel to all channels of the cyclone. Analysed modified multi-channel cyclone can be effectively treated

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24

Bella, G., and V. Rocco. "Regeneration Analysis Under Different Exhaust Gas Thermal Conditions." Journal of Engineering for Gas Turbines and Power 112, no. 3 (1990): 431–37. http://dx.doi.org/10.1115/1.2906514.

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A refinement of the honeycomb trap model developed by the authors for analyzing the temperature history of the trap channels during the regeneration period is presented. The first results obtained, shown in previous papers [1, 2], encouraged the authors to improve the model in order to account for the heat transfer not only along the channel length, but also in the radial direction. In order to achieve this objective, a control volume approach was used to simulate the soot regeneration in all contiguous channels along the axial and radial directions of the monolith, and to determine the wall t

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Duy, Vinh Nguyen, Jung Koo Lee, Ki Won Park, and Hyung Man Kim. "Enhancement of PEM Fuel Cell Performance by Flow Control." Materials Science Forum 804 (October 2014): 75–78. http://dx.doi.org/10.4028/www.scientific.net/msf.804.75.

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Flow-field design affects directly to the PEM fuel cell performance. This study aims to stimulate the under-rib convection by adding sub-channels and by-passes to the conventional-advanced serpentine flow-field to improve the PEM fuel cell performance. The experimental results show that if reacting gases flow in the same direction as the neighboring main channels, the under-rib convection shows a flow from the main channels to the sub-channels makes progress in reducing pressure drop and enhancing uniform gas supply and water diffusion. Alternatively, if in the direction opposite to that of th

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Krasnov, Andrey, Gennadiy Kolovertnov, Marina Prakhova, and Elena Khoroshavina. "Improving data transfer efficiency in a gas field wireless telemetry system." Arctic Environmental Research 18, no. 1 (2018): 14–20. http://dx.doi.org/10.17238/issn2541-8416.2018.18.1.14.

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Effective organisation of communication channels in autonomous information and measurement systems (AIMS) is a burning issue. It is particularly challenging for areas where, for a number of reasons (primarily unprofitability or immaturity of the wired infrastructure), telecommunications can rely only on wireless technologies, i.e., radio channels. Arctic regions of the Russian Federation, where most of Russia’s gas and gas condensate deposits are located, constitute a typical example of such areas. The key challenges during construction of wireless communication channels are associated with th

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Bilynsky, Yosyp, Oksana Horodetska, Svitlana Sirenko, and Dmytro Novytskyi. "EXPERIMENTAL STUDY OF NATURAL GAS HUMIDITY CONTROL DEVICE." Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska 10, no. 3 (2020): 86–90. http://dx.doi.org/10.35784/iapgos.2079.

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The means of measuring humidity based on the use of the ultrahigh frequency method have been recently gaining widespread use, because of its simple, robust construction and high measuring accuracy. We used the advanced waveguide ultrahigh frequency method of measuring the moisture content of natural gas which, in contrast to the known the use of a traveling wave in a waveguide, is proposed. In this case, the interaction with waves of the ultrahigh frequency range changes the dielectric properties of the gas, and this change is registered. On the basis of an improved ultrahigh frequency method

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28

Chen, Shi Zhong, Yu Hou Wu, Hong Sun, and Hong Tan Liu. "An Improved Two-Phase Flow and Transport Model for the PEM Fuel Cell." Advanced Materials Research 105-106 (April 2010): 691–94. http://dx.doi.org/10.4028/www.scientific.net/amr.105-106.691.

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A two-phase flow, multi-component model has been optimized for a PEM (Proton Exchange Membrane) Fuel Cell. The modeling domain consists of the membrane, two catalyst layers, two diffusion layers, and two channels. Both liquid and gas phases are considered in the entire cathode and anode, including the channel, the diffusion layer and the catalyst layer. The Gravity effect on liquid water was considered in channels. Typical two-phase flow distributions in the cathode gas channel, gas diffuser and catalyst layer are presented. Source term and porosity term were optimized. Based on the simulation

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Wang, Xuefang, Xianshan Dong, Junfeng Xiao, et al. "Quantum effects of gas flow in nanochannels." Nanotechnology Reviews 10, no. 1 (2021): 254–63. http://dx.doi.org/10.1515/ntrev-2021-0022.

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Abstract Based on the thermal theory of Newtonian mechanics, the pressure difference in the macro channels will drive the gas flow until the pressure difference inside is zero. However, the 12-year vacuum packaging experiments in our laboratory showed that when the macroscopic channel is reduced to a critical size and reaches the nanometer level, the gas flow inside the channel is hindered, that is, the differential pressure cannot become zero. To explain this paradoxical phenomenon, this study analyzes the flow of air molecules in the channel by using the De Broglie’s matter waves and Heisenb

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Chen, Yuan Long, H. B. Zhan, Shuo Jen Lee, and S. M. Zhu. "Micro-ECM of Maze Flow Channel on Bipolar Plates of Fuel Cell." Key Engineering Materials 458 (December 2010): 125–30. http://dx.doi.org/10.4028/www.scientific.net/kem.458.125.

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A lot of flow channels should be processed on stainless steel bipolar plates of fuel cell. In order to increase contact area of gas with electrode and ensure the gas flowing smoothly, the flow channels will be multichannel maze. It is difficult to be machined by conventional methods, because the width and depth of the flow channels are very small (about 300μm). When using micro electrochemical machining, flow channels with low surface roughness and good machining accuracy could be produced efficiently. The machining cathode tool, fixture, μ-second grade pulse power supply and machining paramet

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31

Dyga, Roman, and Małgorzata Płaczek. "Influence of Hydrodynamic Conditions on the Type and Area of Occurrence of Gas–Liquid Flow Patterns in the Flow through Open–Cell Foams." Materials 13, no. 15 (2020): 3254. http://dx.doi.org/10.3390/ma13153254.

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This paper reports the results of a study concerned with air−water and air−oil two–phase flow pattern analysis in the channels with open–cell metal foams. The research was conducted in a horizontal channel with an internal diameter of 0.02 m and length of 2.61 m. The analysis applied three foams with pore density equal to 20, 30 and 40 PPI (pore per inch) with porosity, typical for industrial applications, changing in the range of 92%–94%. Plug flow, slug flow, stratified flow and annular flow were observed over the ranges of gas and liquid superficial velocities of 0.031–8.840 m/s and 0.006–0

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32

GAT, A., I. FRANKEL, and D. WEIHS. "Gas flows through constricted shallow micro-channels." Journal of Fluid Mechanics 602 (April 25, 2008): 427–42. http://dx.doi.org/10.1017/s0022112008001055.

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We study the viscous compressible flow through micro-channels of non-uniform cross-section. A lubrication approximation is applied to analyse the flow through shallow configurations whose gap width is small in comparison with the other characteristic dimensions. Focusing on channels with a symmetric constriction (or cavity) we obtain the solution to the problem by means of a Schwarz–Christoffel transformation. This analytic solution is verified by examining the convergence of numerical simulations with diminishing Reynolds number and gap width. Explicit closed-form expressions for the pressure

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33

Crawford, M. "Heat transfer in gas-cooled annular channels." International Journal of Heat and Fluid Flow 9, no. 4 (1988): 434–35. http://dx.doi.org/10.1016/0142-727x(88)90015-x.

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MURASE, Michio, Hiroaki SUZUKI, Tomoyuki MATSUMOTO, and Masanori NAITOH. "Countercurrent Gas-Liquid Flow in Boiling Channels." Journal of Nuclear Science and Technology 23, no. 6 (1986): 487–502. http://dx.doi.org/10.1080/18811248.1986.9735012.

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Gulliver, John S., and Martin J. Halverson. "Air-water gas transfer in open channels." Water Resources Research 25, no. 8 (1989): 1783–93. http://dx.doi.org/10.1029/wr025i008p01783.

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36

Inoue, Takayoshi, Satoshi Nakada, and Yuji Suzuki. "C143 Gas Flow Characteristics in Nanoscale Channels." Proceedings of the Thermal Engineering Conference 2009 (2009): 87–88. http://dx.doi.org/10.1299/jsmeted.2009.87.

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HWANG, Young-Kyu, Joong-Sik HEO, and Myoung-Keun KWON. "Rarefied Gas Flows in Rotating Helical Channels." JSME International Journal Series B 43, no. 4 (2000): 700–705. http://dx.doi.org/10.1299/jsmeb.43.700.

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38

Kays, W. M. "Heat Transfer in Gas-cooled Annular Channels." International Journal of Heat and Mass Transfer 32, no. 1 (1989): 197. http://dx.doi.org/10.1016/0017-9310(89)90104-x.

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Ozhgibesov, M. S., T. S. Leu, and C. H. Cheng. "Rarefied gas flow through nanoscale tungsten channels." Journal of Molecular Graphics and Modelling 42 (May 2013): 32–38. http://dx.doi.org/10.1016/j.jmgm.2013.02.013.

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40

Carlotti, P. "Stratified Poiseuille gas flows in horizontal channels." International Journal of Heat and Mass Transfer 50, no. 17-18 (2007): 3690–94. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2007.01.054.

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Tolstopyatov, E. M. "Thickness uniformity of gas-phase coatings in narrow channels: I. Long channels." Journal of Physics D: Applied Physics 35, no. 13 (2002): 1516–25. http://dx.doi.org/10.1088/0022-3727/35/13/311.

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42

Cheng, Shan Jen, Jr Ming Miao, and Chang Hsien Tai. "Numerical Simulation Applied to Study the Effects of Fractal Tree-Liked Network Channel Designs on PEMFC Performance." Advanced Materials Research 488-489 (March 2012): 1219–23. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.1219.

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The effect of pressure drop and the flow-field of inhomogeneous transport of reactions gas are two important issues for bipolar flow channel design in proton exchange membrane fuel cell (PEMFC). A novel design through the imitation of biological development of the topology distribution of fractal tree-liked network channel is the main topic of this research. The effects of different Reynolds numbers and stoichiometric mass flow rate of reaction gas on the flow field distribution of tree-like channels were investigated by three-dimensional computational fluid dynamic analysis. According to nume

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43

Kuzevanov, Vyacheslav S., and Sergey K. Podgorny. "Gas-cooled nuclear reactor core shaping using heat exchange intensifiers." Nuclear Energy and Technology 5, no. 1 (2019): 75–80. http://dx.doi.org/10.3897/nucet.5.34294.

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The need to shape reactor cores in terms of coolant flow distributions arises due to the requirements for temperature fields in the core elements (Safety guide No. NS-G-1.12. 2005, IAEA nuclear energy series No. NP-T-2.9. 2014, Specific safety requirements No. SSR-2/1 (Rev.1) 2014). However, any reactor core shaping inevitably leads to an increase in the core pressure drop and power consumption to ensure the primary coolant circulation. This naturally makes it necessary to select a shaping principle (condition) and install heat exchange intensifiers to meet the safety requirements at the lowes

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Pantazis, S., S. Varoutis, V. Hauer, C. Day, and D. Valougeorgis. "Gas-surface scattering effect on vacuum gas flows through rectangular channels." Vacuum 85, no. 12 (2011): 1161–64. http://dx.doi.org/10.1016/j.vacuum.2010.12.019.

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Ghafarinia, Vahid, Amir Amini, and Mohammad Paknahad. "Gas Identification by a Single Gas Sensor Equipped with Microfluidic Channels." Sensor Letters 10, no. 3 (2012): 845–49. http://dx.doi.org/10.1166/sl.2012.2590.

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Plotnikov, L. V., B. P. Zhilkin, Yu M. Brodov, N. I. Grigoriev, and L. E. Osipov. "Physical simulation of thermomechanics of gas flows in the output channels of turbocharger centrifugal compressor." Power engineering: research, equipment, technology 22, no. 3 (2020): 44–50. http://dx.doi.org/10.30724/1998-9903-2020-3-44-50.

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It is known that the thermal and mechanical characteristics of the air flow in the output channel of the turbocharger compressor largely determine the efficiency and quality of the gas exchange processes of the piston engine. The research was carried out on an experimental installation containing a turbocharger, output channels of different configurations, a measurement database and a data collection system. It was found that the stabilization of the flow in the output channel of the compressor leads to a significant increase in the heat transfer intensity (up to 25 %) compared to the base pip

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Said, Ibrahim, Shaoib Usman, Muthanna Al-Dahhan, Mahmoud Moharam, and Vineet Alexander. "Axial dispersion and mixing of coolant gas within a separate-effect prismatic modular reactor." Nuclear Energy and Technology 4, no. 3 (2018): 167–78. http://dx.doi.org/10.3897/nucet.4.27346.

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Multiphase Reactors Engineering and Applications Laboratory performed gas phase dispersion experiments in a separate-effect cold-flow experimental setup for coolant flow within heated channels of the prismatic modular reactor under accident scenario using gaseous tracer technique. The separate-effect experimental setup was designed on light of local velocity measurements obtained by using hot wire anemometry. The measurements consist of pulse-response of gas tracer that is flowing through the mimicked riser channel using air as a carrier. The dispersion of the gas phase within the separate-eff

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Kosov, V. N., S. A. Krasikov, O. V. Fedorenko, and A. B. Kalimov. "CONVECTIVE MIXING IN AN INCLINED CHANNEL CAUSED BY TERNARY DIFFUSION UNDER CONDITION OF INCREASING DENSITY OF THE MIXTURE WITH HEIGHT." BULLETIN Series of Physics & Mathematical Sciences 69, no. 1 (2020): 224–30. http://dx.doi.org/10.51889/2020-1.1728-7901.39.

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Using methods of numerical simulation, we studied the quasi-stationary mass transfer of isothermal ternary gas mixtures in the vertical and inclined channels for the zone of flow exit from a given channel into the lower flask of a diffusion cell. Convective mixing is considered under conditions involving an increase in the density of the mixture with the height of the channel. The characteristic features of structured flows were studied at a certain content of the component with the highest molecular weight in the mixture. The convective formations in the vertical and inclined channels are com

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Levato, Tadzio, Michal Nevrkla, Muhammad Fahad Nawaz, et al. "Experimental Study of Nanosecond Laser-Generated Plasma Channels." Applied Sciences 10, no. 12 (2020): 4082. http://dx.doi.org/10.3390/app10124082.

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Generation of plasma-channels by interaction of gas targets with nanosecond laser beams was investigated experimentally. Such laser-generated plasma channels are very promising for subsequent guiding of high peak power femtosecond laser pulses, over several tens of centimeters, as required in laser wake field electron-acceleration (LWFA). The experimental setup was based on the use of a cylindrical lens (100 mm of focal length) with the aim of proposing a technical solution easy to be integrated into a compact experimental setup for acceleration of multi-GeV electron beams using high peak-powe

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Tachikawa, Hiroto. "SN2 and SN2′ reaction dynamics of cyclopropenyl chloride with halide ion A direct ab initio molecular dynamics (MD) study." Canadian Journal of Chemistry 83, no. 9 (2005): 1597–605. http://dx.doi.org/10.1139/v05-176.

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Direct ab initio molecular dynamics (MD) calculations have been carried out for the reaction of cyclopropenyl chloride with halide ion (F) (F + (CH)3Cl → F(CH)3 + Cl) in gas phase. Both SN2 and SN2′ channels were found as product channels. These channels are strongly dependent on the collision angle of F to the target (CH)3Cl molecule. The collision at one of the carbon atoms of the C=C double bond leads to the SN2′ reaction channel; whereas the collision at the methylene carbon atom leads to the SN2 reaction channel. The reactions proceed via a direct mechanism without long-lived complexe

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