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Artykuły w czasopismach na temat „Travelling Wave Tube”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Doveil, F., A. Macor, and Kh Auhmani. "Wave–particle interaction investigated in a travelling wave tube." Plasma Physics and Controlled Fusion 47, no. 5A (2005): A261—A271. http://dx.doi.org/10.1088/0741-3335/47/5a/018.

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2

LI Hao, 李昊, 田进寿 TIAN Jin-shou, 李岩 LI Yan, et al. "Travelling Wave Deflecting Characteristics of Streak-tube." ACTA PHOTONICA SINICA 42, no. 7 (2013): 792–96. http://dx.doi.org/10.3788/gzxb20134207.0792.

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3

Kumar, Manish, Lalita Bhasin, and V. K. Tripathi. "Plasma effects in a travelling wave tube." Physica Scripta 81, no. 2 (2010): 025502. http://dx.doi.org/10.1088/0031-8949/81/02/025502.

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4

Ramesh, K., and M. Devakar. "Effect of endoscope on the peristaltic transport of a couple stress fluid with heat transfer: Application to biomedicine." Nonlinear Engineering 8, no. 1 (2019): 619–29. http://dx.doi.org/10.1515/nleng-2017-0166.

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Abstract In this investigation, we have studied the problem of peristaltic flow with heat transfer through the gap between coaxial inclined tubes where the inner tube is rigid and the outer tube has sinusoidal wave travelling down its wall. The problem has been formulated in cylindrical coordinate system. The equations governing the flow have been simplified under the long wavelength and low Reynolds number assumptions. The exact solution is obtained for the temperature profile. The perturbation solutions for the velocity and pressure gradient are obtained for small couple stress parameter. Pr

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5

Alaria, Mukesh Kumar, and S. K. Ghosh. "Backward wave oscillation suppression study of the helix travelling wave tube." Journal of Electromagnetic Waves and Applications 33, no. 5 (2018): 557–63. http://dx.doi.org/10.1080/09205071.2018.1561332.

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6

Xiong, Ying, Xianfeng Tang, Juncheng Ma, and Liping Yu. "Miniaturized Metamaterial-Inspired Travelling Wave Tube for S Band." Electronics 12, no. 14 (2023): 3062. http://dx.doi.org/10.3390/electronics12143062.

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A miniaturized traveling wave tube (TWT) was studied by proposing a novel metamaterial (MTM) slow wave structure (SWS). The dispersion results show that n = −1 space harmonic of the fundamental mode exhibits the “forward” wave properties, which is the foundation of the MTM-inspired TWT. Meanwhile, the interaction impedance for mode 2 of the novel MTM SWS can be sharply decreased by introducing four blend edges to weaken the corresponding longitudinal electric field. Also, two coaxial couplers are presented to input/output the signals. The transmission results show that the reflection is as low

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7

Waters, S. L., and C. Guiot. "Flow in an Elastic Tube Subject to Prescribed Forcing: A Model of Umbilical Venous Flow." Journal of Theoretical Medicine 3, no. 4 (2001): 287–98. http://dx.doi.org/10.1080/10273660108833081.

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We investigate the fluid flow through a finite length, axisymmetric tube when the elastic wall is subject to either a prescribed external pressure or a prescribed motion. The prescribed wall forcing is assumed to consist of a forward travelling wave together with a reflected travelling wave. The dimensionless diameter variation of the tube is taken to be small and perturbation techniques are used to solve the weakly non-linear problem. Particular attention is given to the steady streaming flow that is induced through the non-linear convective acceleration terms. The results are applied to the

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8

Wang Hui, 王晖, 李宏福 Li Hongfu, 鄢然 Yan Ran, et al. "Dielectricloaded interaction structure for gyrotrontravelling wave tube." High Power Laser and Particle Beams 23, no. 9 (2011): 2484–88. http://dx.doi.org/10.3788/hplpb20112309.2484.

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9

Jiang Yi, 蒋艺, 陈洪斌 Chen Hongbin, 马国武 Ma Guowu, and 雷文强 Lei Wenqiang. "Design and simulation of confocal gyro-travelling wave tube." High Power Laser and Particle Beams 24, no. 2 (2012): 403–6. http://dx.doi.org/10.3788/hplpb20122402.0403.

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10

Guo, Guo, Yanyu Wei, Minghao Zhang, et al. "Analysis of 140 gigahertz folded frame travelling wave tube." Physics of Plasmas 20, no. 10 (2013): 103118. http://dx.doi.org/10.1063/1.4826589.

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11

Kowstubha, Palle, K. Krishnaveni, and K. Ramesh Reddy. "Electronic Power Conditioner for Ku-band Travelling Wave Tube." Journal of The Institution of Engineers (India): Series B 98, no. 2 (2016): 213–20. http://dx.doi.org/10.1007/s40031-016-0257-1.

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12

Raju, R. S., R. Verma, V. Srivastava, et al. "Computer Aided Design of A Helix Travelling-Wave Tube." IETE Technical Review 9, no. 1 (1992): 11–19. http://dx.doi.org/10.1080/02564602.1992.11438818.

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13

Kotiranta, M., and V. Krozer. "Design of 825 GHz square helix travelling‐wave tube." Electronics Letters 49, no. 4 (2013): 271–72. http://dx.doi.org/10.1049/el.2012.4477.

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14

Bliokh, Konstantin, Yury Bliokh, Mikhail Ljubarskij, and Vitalii Podobinsky. "Automodulation regime of linear beam-plasma microwave amplifier caused by excitation of ion-sound waves in plasma." Izvestiya VUZ. Applied Nonlinear Dynamics 7, no. 1 (1999): 29–39. http://dx.doi.org/10.18500/0869-6632-1999-7-1-29-39.

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А theory of the plasma-filled travelling-wave tube (TWT) linear amplifiers is developed in which the effect of ion-sound waves excited in plasma by the ponderomotive force of operating wave is taken into account. Ion-sound waves propagated against the beam form the distributed internal feedback which tums microwave amplifier into low frequency oscillator. Excited low frequency plasma variations lead to output microwave amplitude modulations. In dependence on the beam current this automodulation could be regnlar or stochastic.

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15

Datta, S. "Backward-Wave Oscillation Criterion in a Step-Tapered Helix Travelling-Wave Tube." Defence Science Journal 59, no. 1 (2009): 49–54. http://dx.doi.org/10.14429/dsj.59.1484.

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16

Camassa, Roberto, H. Reed Ogrosky, and Jeffrey Olander. "Viscous film flow coating the interior of a vertical tube. Part 1. Gravity-driven flow." Journal of Fluid Mechanics 745 (March 25, 2014): 682–715. http://dx.doi.org/10.1017/jfm.2014.90.

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AbstractThe gravity-driven flow of a viscous liquid film coating the inside of a tube is studied both theoretically and experimentally. As the film moves downward, small perturbations to the free surface grow due to surface tension effects and can form liquid plugs. A first-principles strongly nonlinear model based on long-wave asymptotics is developed to provide simplified governing equations for the motion of the film flow. Linear stability analysis on the basic solution of the model predicts the speed and wavelength of the most unstable mode, and whether the film is convectively or absolute

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17

Hastings, S. P., J. B. McLeod, and W. C. Troy. "Boundary-value problems in the Fanno model for turbulent compressible flow." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 132, no. 1 (2002): 121–40. http://dx.doi.org/10.1017/s0308210500001554.

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A recent paper of Ockendon et al. discusses the Fanno model for quasi-one-dimensional flow of gas in a tube, in situations where the flow is turbulent and the tube is long enough for wall drag to be important. Based on appropriate scalings and with associated boundary conditions they derive equations for similarity solutions and make predictions about travelling and evolving waves. In this paper the existence, uniqueness and asymptotic behaviour of these wave forms is proved rigorously. Techniques include shooting methods (both one- and two-parameter), appropriate changes of variables, and com

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18

Mohd Ghazali, Normah, Irfan Abd Rahim, Terry Quenet, and Zaki Ab Muin. "Investigation of the Velocity Profiles in a Ninety-Degree Curved Standing Wave Resonator with Particle Image Velocimetry." Applied Mechanics and Materials 388 (August 2013): 8–12. http://dx.doi.org/10.4028/www.scientific.net/amm.388.8.

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Travelling wave thermoacoustic heat engines have been reported to have a higher efficiency than the standing wave ones. The former are generally large systems which consist of toroidal shape resonators. While standing wave heat engines are inherently smaller, a reduction in size could be considered which may involve curvatures as compared to the straight tube conventional systems. However, as with the streaming losses in the travelling wave resonators, losses due to the curvature may be generated. This study involves preliminary experimental measurements using the Particle Image Velocimetry (P

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19

Wang Yongfei, 汪永飞, 周东方 Zhou Dongfang, 张德伟 Zhang Dewei, et al. "Reflective predistortion linearizer for Ka-band travelling wave tube amplifiers." High Power Laser and Particle Beams 25, no. 6 (2013): 1391–95. http://dx.doi.org/10.3788/hplpb20132506.1391.

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20

Azov, G. A., M. V. Efremova, V. A. Solntsev, and S. A. Khritkin. "Simulation of a three-millimeter-band pulse travelling wave tube." Journal of Communications Technology and Electronics 61, no. 8 (2016): 915–19. http://dx.doi.org/10.1134/s1064226916080027.

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21

Chanakya, Talur, N. K. Manker, V. B. Naidu, and S. K. Datta. "Multipaction Susceptibility Margins in Space Travelling wave Tubes." Defence Science Journal 71, no. 03 (2021): 337–40. http://dx.doi.org/10.14429/dsj.71.16769.

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Study of multipaction breakdown margins in the output connector of a travelling-wave tube (TWT) is essential for application in satellite-borne systems. A TWT uses a coaxial ceramic window, a coaxial output coupler and / or a waveguide output coupler that are prone to multipaction breakdown boosted by high RF power due to the ion accumulation in critical regions during the transition of the satellite through plasma pockets in space. A detailed procedure for estimating the multipaction susceptibility margins in a TWT using CST studio and analytical equations is presented in this paper, and outp

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22

Zhang, Zhineng, Ling Zheng, Tingfei Yan, and Yao Wu. "1D Numerical Study of Nonlinear Propagation of Finite Amplitude Waves in Traveling Wave Tubes with Varying Cross Section." International Journal of Acoustics and Vibration 25, no. 1 (2020): 88–95. http://dx.doi.org/10.20855/ijav.2020.25.11580.

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The nonlinear acoustic problem of a finite amplitude plane wave propagating along the axial direction in a traveling wave tube is studied. Based on the one-dimensional Westervelt equation, a one-dimensional nonlinear wave equation is derived in which the cross section of the traveling wave tube is considered. The two-order finite difference scheme is used to solve the nonlinear wave equation. The nonlinear propagation characteristics of a finite amplitude wave in the traveling wave tube is analyzed. In the expanding transition section, the acoustic pressure amplitude of the acoustic wave decre

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23

Li, Liang Jie, Long Biao He, Xue Jing Wang, and Ping Yang. "The Realization for Sound Pressure Unit Using Laser Doppler Anemometry in a Travelling Wave Tube." Applied Mechanics and Materials 239-240 (December 2012): 57–64. http://dx.doi.org/10.4028/www.scientific.net/amm.239-240.57.

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Abstract. To realize the sound pressure unit directly, the method of sound pressure measurement based on acoustic particle velocity was described. In order to get a simple acoustic field, a travelling wave tube was designed. The sound pressure distribution obtained by microphone along the tube was measured. The result showed the acoustic field inside the tube could be considered as travelling wave and the sound pressure is equal to the product of the air density, sound speed and the particle velocity. The laser Doppler Anemometry was used to measure the particle velocity in the acoustic field.

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24

Zhao, Bin, and Gang Wang. "Equivalent Circuit of a Planar Transformer Used for TWTA." Applied Mechanics and Materials 644-650 (September 2014): 3564–67. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.3564.

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In this paper, application of planar transformers in TWTA (Travelling-wave Tube Amplifier) is investigated and a method of equivalent circuit is used to study performance of planar transformers. The lumped parameters of planar transformers are extracted by FEM (Finite Element Method).

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25

Timsina, Ramesh Chandra. "Mathematical Models on Mechanics of Biofluids." Patan Pragya 13, no. 1 (2024): 64–76. http://dx.doi.org/10.3126/pragya.v13i1.71183.

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In this work, we study the mathematical models of flows for some biofluids. In biomechanics, peristaltic flow plays an important role in which the motion generated in the fluid contained in a distensible tube when a progressive wave of area contraction and expansion travels along the wall of the tube. We consider the effect of elasticity of the tube wall in the flow through the progressive wave travelling along its length without its direct calculation. Since the no – slip condition has used on a moving undulating wall surface, it determines the sinusoidal boundary conditions on the upper and

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26

He, Fang-ming, Wen-qiu Xie, Ji-run Luo, Min Zhu, and Wei Guo. "Linear theory of beam–wave interaction in double-slot coupled cavity travelling wave tube." Chinese Physics B 25, no. 3 (2016): 038401. http://dx.doi.org/10.1088/1674-1056/25/3/038401.

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27

Srivastava, Vishnu. "Nonlinear analysis of beam-wave interaction in a planar THz travelling-wave tube amplifier." Journal of Electromagnetic Waves and Applications 32, no. 2 (2017): 190–203. http://dx.doi.org/10.1080/09205071.2017.1374217.

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28

Niu Jingyang, 牛婧杨, 王丽 Wang Li, 罗勇 Luo Yong, and 蒋伟 Jiang Wei. "Thermal analysis of electron gun cathode for gyrotron travelling wave tube." High Power Laser and Particle Beams 25, no. 2 (2013): 446–50. http://dx.doi.org/10.3788/hplpb20132502.0446.

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29

Thottappan, M., Surya Prakash Singh, and P. K. Jain. "Analysis and PIC simulation of a Gyrotron travelling wave tube amplifier." Journal of Microwaves, Optoelectronics and Electromagnetic Applications 12, no. 2 (2013): 307–24. http://dx.doi.org/10.1590/s2179-10742013000200006.

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30

Hong-Quan, Xie, and Liu Pu-Kun. "Theoretical analysis of a relativistic travelling wave tube filled with plasma." Chinese Physics 16, no. 3 (2007): 766–71. http://dx.doi.org/10.1088/1009-1963/16/3/034.

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31

Pant, K. K., and V. K. Tripathi. "Modified surface-helix modes in a plasma-filled travelling wave tube." Journal of Physics D: Applied Physics 27, no. 4 (1994): 765–69. http://dx.doi.org/10.1088/0022-3727/27/4/014.

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32

HIRATA, HITOSHI. "Analysis of phase and intermodulation distortion of a travelling-wave tube." International Journal of Electronics 83, no. 2 (1997): 249–70. http://dx.doi.org/10.1080/002072197135562.

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33

Shao, Wei, Qing Zhou, Hanwen Tian, et al. "Design of a 340 GHz phase-velocity-taper travelling wave tube." Journal of Engineering 2018, no. 14 (2018): 673–77. http://dx.doi.org/10.1049/joe.2018.0110.

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34

Tahanian, E., and G. R. Dadashzadeh. "Gain analysis of the gap-groove folded-waveguide travelling-wave tube." Journal of Electromagnetic Waves and Applications 31, no. 4 (2017): 363–74. http://dx.doi.org/10.1080/09205071.2017.1282328.

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35

Kumar, L., S. M. Sharma, R. S. Raju, et al. "Design and Development of an S-band Helix Travelling Wave Tube." IETE Journal of Research 40, no. 1 (1994): 25–30. http://dx.doi.org/10.1080/03772063.1994.11437160.

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36

Datta, S. K., P. K. Jain, and B. N. Basu. "Second-Order Nonlinear Eulerian Analysis of a Travelling-Wave Tube Amplifier." IETE Journal of Research 45, no. 1 (1999): 39–48. http://dx.doi.org/10.1080/03772063.1999.11416070.

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37

Chaudhary, Anjali, Divya J. Prakash, R. B. Jacobson, et al. "Electroplating on Unconventional Ultra-Compliant Substrates for Travelling Wave Tube Amplifiers." ECS Meeting Abstracts MA2023-01, no. 22 (2023): 1555. http://dx.doi.org/10.1149/ma2023-01221555mtgabs.

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We report gold electroplating on ultra-compliant substrates comprising helical slow wave structures (SWSs) for traveling wave tube amplifiers (TWTAs) [1]. The novel ultra-compliant substrates are composed of edge-tethered tri-layer metal ribbons with a helical geometry of microscale diameter. After electroplating with gold, we obtain overall thicknesses of a few um. We discuss different controllable electroplating conditions that influence thickness, uniformity, roughness, and related properties of deposited gold films on helical ribbons. In addition to increasing conductance of the electropla

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38

Mekheimer, K. S., and Y. Abd Elmaboud. "Peristaltic Transport of a Particle–Fluid Suspension through a Uniform and Non-Uniform Annulus." Applied Bionics and Biomechanics 5, no. 2 (2008): 47–57. http://dx.doi.org/10.1155/2008/391687.

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This study looks at the influence of an endoscope on the peristaltic flow of a particle–fluid suspension (as blood model) through tubes. A long wavelength approximation through a uniform and non-uniform infinite annulus filled with an incompressible viscous and Newtonian fluid mixed with rigid spherical particles of identical size is investigated theoretically. The inner tube is uniform, rigid and moving with a constant velocity V0, whereas the outer non-uniform tube has a sinusoidal wave travelling down its wall. The axial velocity of the fluid phase uf, particulate phase upand the pressure g

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39

Pandey, Sanjay Kumar, and Amirlal Singh. "Peristaltic transport in an elastic tube under the influence of dilating forcing amplitudes." International Journal of Biomathematics 13, no. 04 (2020): 2050027. http://dx.doi.org/10.1142/s1793524520500278.

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We investigate flow through an elastic tube which is constrained to a prescribed external forcing consisting of a progressive travelling wave. Such a flow dynamics is closely related to that in the oesophageal tube. The mechanics of the tube is characterized by a relationship between transmural pressure difference and radial variation of the tube. Dimensionless radial variation, assumed to be small, is studied by perturbation techniques. Results demonstrate that the elasticity of the tube plays a significant role in the flow dynamics. An increment in the forcing amplitude of the inward radial

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40

Kumar, Mithilesh, M. K. Geetha, and M. Vijay Kumar. "Design of Magnetic Focusing system for a Compact Ka band Helix TWT." Defence Science Journal 71, no. 03 (2021): 329–31. http://dx.doi.org/10.14429/dsj.71.16810.

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In this paper we discuss the design of Magnetic focusing system (MFS) for a compact helix travelling wave tube (TWT) operating in Ka-band. Issues related to the design of the magnetic focusing system have been discussed in detail along with practical measurement results. The key design parameters considered for this TWT are: the cathode voltage is around 9.3kV, beam current is 200mA and total length of the tube not more than 6 inch with minimal weight.

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41

WEI, HSIEN-HUNG, and DAVID S. RUMSCHITZKI. "The weakly nonlinear interfacial stability of a core–annular flow in a corrugated tube." Journal of Fluid Mechanics 466 (September 10, 2002): 149–77. http://dx.doi.org/10.1017/s0022112002001222.

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A core–annular flow, the concurrent axial flow of two immiscible fluids in a circular tube or pore with one fluid in the core and the other in the wetting annular region, is frequently used to model technologically important flows, e.g. in liquid–liquid displacements in secondary oil recovery. Most of the existing literature assumes that the pores in which such flows occur are uniform circular cylinders, and examine the interfacial stability of such systems as a function of fluid and interfacial properties. Since real rock pores possess a more complex geometry, the companion paper examined the

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42

SHU, Guoxiang, Lihong CAO, Hao XIONG, et al. "A staggered double vane slow wave structure of 0.24 THz sheet beam travelling wave tube." Journal of Shenzhen University Science and Engineering 36, no. 2 (2019): 128. http://dx.doi.org/10.3724/sp.j.1249.2019.02128.

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43

Sinha, A. K., R. Verma, R. K. Gupta, et al. "Simplified tape model of arbitrarily-loaded helical slow-wave structures of a travelling-wave tube." IEE Proceedings H Microwaves, Antennas and Propagation 139, no. 4 (1992): 347. http://dx.doi.org/10.1049/ip-h-2.1992.0062.

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44

Zhao-Yun, Duan, Gong Yu-Bin, Wei Yan-Yu, and Wang Wen-Xiang. "Theoretical research on the performance of a practical helix travelling wave tube." Chinese Physics B 17, no. 7 (2008): 2484–90. http://dx.doi.org/10.1088/1674-1056/17/7/023.

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45

GONG, YUBIN, WENXIANG WANG, SHENGGANG LIU, and YAOWU LIU. "Small-signal theory of a ridge-loaded ring-plane travelling-wave tube." International Journal of Electronics 85, no. 5 (1998): 681–96. http://dx.doi.org/10.1080/002072198133932.

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46

Kumar, Lalit, S. M. Sharma, R. S. Raju, et al. "Development of a 30 W (peak) S-band Helix Travelling-wave Tube." IETE Technical Review 10, no. 4 (1993): 379–80. http://dx.doi.org/10.1080/02564602.1993.11437358.

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47

Scalo, Carlo, Sanjiva K. Lele, and Lambertus Hesselink. "Linear and nonlinear modelling of a theoretical travelling-wave thermoacoustic heat engine." Journal of Fluid Mechanics 766 (February 5, 2015): 368–404. http://dx.doi.org/10.1017/jfm.2014.745.

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AbstractWe have carried out three-dimensional Navier–Stokes simulations, from quiescent conditions to the limit cycle, of a theoretical travelling-wave thermoacoustic heat engine (TAE) composed of a long variable-area resonator shrouding a smaller annular tube, which encloses the hot (HHX) and ambient (AHX) heat exchangers, and the regenerator (REG). Simulations are wall-resolved, with no-slip and adiabatic conditions enforced at all boundaries, while the heat transfer and drag due to the REG and HXs are modelled. HHX temperatures have been investigated in the range 440–500 K with the AHX temp

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48

Vashishtha, Ashish, Dean Callaghan, Cathal Nolan, and Ralf Deiterding. "Numerical Investigation of Detonation Propagation Through Small Orifice Holes." Transactions on Aerospace Research 2021, no. 3 (2021): 17–33. http://dx.doi.org/10.2478/tar-2021-0014.

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Abstract Seeking to better understand the physical phenomena underlying detonation wave propagation through small holes (especially the phenomenon of detonation re-initiation or its failure), we investigated the propagation of a detonation wave along a tube filled with a hydrogen-oxygen mixture diluted with argon, in the presence of obstacles with a small orifice hole. Numerical simulations were performed in a two-dimensional domain using adaptive mesh refinement and by solving compressible Euler equations for multiple thermally perfect species with a reactive source term. A premixed mixture o

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49

Mahmoud, S. R. "Effect of Rotation and Magnetic Field through Porous Medium on Peristaltic Transport of a Jeffrey Fluid in Tube." Mathematical Problems in Engineering 2011 (2011): 1–13. http://dx.doi.org/10.1155/2011/971456.

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This paper is concerned with the analysis of peristaltic motion of a Jeffrey fluid in a tube with sinusoidal wave travelling down its wall. The effect of rotation, porous medium, and magnetic field on peristaltic transport of a Jeffrey fluid in tube is studied. The fluid is electrically conducting in the presence of rotation and a uniform magnetic field. An analytic solution is carried out for long wavelength, axial pressure gradient, and low Reynolds number considerations. The results for pressure rise and frictional force per wavelength were obtained, evaluated numerically, and discussed bri

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Dragon, Carolyn A., and James B. Grotberg. "Oscillatory flow and mass transport in a flexible tube." Journal of Fluid Mechanics 231 (October 1991): 135–55. http://dx.doi.org/10.1017/s0022112091003348.

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The mass transport of a diffusible substance during volume-cycled oscillatory flow in a thin-walled viscoelastic tube is studied. A small-amplitude, long-wavelength travelling wave is generated by the oscillatory pressure gradient. Lubrication theory is employed for slow axial variations to derive regular perturbation solutions to the Navier–Stokes equations. The convection–diffusion equation is solved in a similar manner, assuming uniform steady end concentrations and no wall flux. From the velocity and concentration fields, the time-average rate of axial mass transport is calculated, and its

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