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Academic literature on the topic 'Flow between two cylinders'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Flow between two cylinders"

1

Murad, A., and SK Sen. "Stokes Flow between Two Cylinders." Journal of Bangladesh Academy of Sciences 36, no. 1 (2012): 123–35. http://dx.doi.org/10.3329/jbas.v36i1.10928.

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The two-dimensional slow viscous fluid motion between two co-axial circular cylinders showed the inner cylinder is shear-free and the outer one is rigid. The flow is due to the presence of a line source and a line sink of equal strength on the outer cylinder. The stream function for the flow in the annular region is established. The hydrodynamic force on the inner shear-free cylinder has been evaluated. Some numerical values for the force have been presented in a table and compared with corresponding known values where both inner and outer cylinders are rigid. DOI: http://dx.doi.org/10.3329/jbas.v36i1.10928 Journal of Bangladesh Academy of Sciences, Vol. 36, No. 1, 123-135, 2012

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Renardy, Yuriko, and Daniel D. Joseph. "Couette flow of two fluids between concentric cylinders." Journal of Fluid Mechanics 150 (January 1985): 381–94. http://dx.doi.org/10.1017/s0022112085000179.

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We consider the flow of two immiscible fluids lying between concentric cylinders when the outer cylinder is fixed and the inner one rotates. The interface is assumed to be concentric with the cylinders, and gravitational effects are neglected. We present a numerical study of the effect of different viscosities, different densities and surface tension on the linear stability of the Couette flow. Our results indicate that, with surface tension, a thin layer of the less-viscous fluid next to either cylinder is linearly stable and that it is possible to have stability with the less dense fluid lying outside. The stable configuration with the less-viscous fluid next to the inner cylinder is more stable than the one with the less-viscous fluid next to the outer cylinder. The onset of Taylor instability for one-fluid flow may be delayed by the addition of a thin layer of less-viscous fluid on the inner wall and promoted by a thin layer of more-viscous fluid on the inner wall.

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Zhao, Ming, and Liang Cheng. "Two-dimensional numerical study of vortex shedding regimes of oscillatory flow past two circular cylinders in side-by-side and tandem arrangements at low Reynolds numbers." Journal of Fluid Mechanics 751 (June 16, 2014): 1–37. http://dx.doi.org/10.1017/jfm.2014.268.

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AbstractOscillatory flow past two circular cylinders in side-by-side and tandem arrangements at low Reynolds numbers is simulated numerically by solving the two-dimensional Navier–Stokes (NS) equations using a finite-element method (FEM). The aim of this study is to identify the flow regimes of the two-cylinder system at different gap arrangements and Keulegan–Carpenter numbers (KC). Simulations are conducted at seven gap ratios $\def \xmlpi #1{}\def \mathsfbi #1{\boldsymbol {\mathsf {#1}}}\let \le =\leqslant \let \leq =\leqslant \let \ge =\geqslant \let \geq =\geqslant \def \Pr {\mathit {Pr}}\def \Fr {\mathit {Fr}}\def \Rey {\mathit {Re}}G$ ($G=L/D$ where $L$ is the cylinder-to-cylinder gap and $D$ the diameter of a cylinder) of 0.5, 1, 1.5, 2, 3, 4 and 5 and KC ranging from 1 to 12 with an interval of 0.25. The flow regimes that have been identified for oscillatory flow around a single cylinder are also observed in the two-cylinder system but with different flow patterns due to the interactions between the two cylinders. In the side-by-side arrangement, the vortex shedding from the gap between the two cylinders dominates when the gap ratio is small, resulting in the gap vortex shedding (GVS) regime, which is different from any of the flow regimes identified for a single cylinder. For intermediate gap ratios of 1.5 and 2 in the side-by-side arrangement, the vortex shedding mode from one side of each cylinder is not necessarily the same as that from the other side, forming a so-called combined flow regime. When the gap ratio between the two cylinders is sufficiently large, the vortex shedding from each cylinder is similar to that of a single cylinder. In the tandem arrangement, when the gap between the two cylinders is very small, the flow regimes are similar to that of a single cylinder. For large gap ratios in the tandem arrangement, the vortex shedding flows from the gap side of the two cylinders interact and those from the outer sides of the cylinders are less affected by the existence of the other cylinder and similar to that of a single cylinder. Strong interaction between the vortex shedding flows from the two cylinders makes the flow very irregular at large KC values for both side-by-side and tandem arrangements.

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Pourjafar, M., and A. Salehi-Shabestari. "Unsteady Helical Flow of Giesekus Viscoelastic Fluid between Two Concentric Cylinders." Nihon Reoroji Gakkaishi 42, no. 5 (2015): 297–307. http://dx.doi.org/10.1678/rheology.42.297.

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UMEDA, Shinzaburo, and Wen-Jei YANG. "Flow visualization between two rectangular cylinders." Journal of the Visualization Society of Japan 18, Supplement1 (1998): 161–64. http://dx.doi.org/10.3154/jvs.18.supplement1_161.

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6

Alam, Md Mahbub, Sangil Kim, and Dilip Kumar Maiti. "Flow interference between two tripped cylinders." Wind and Structures 23, no. 2 (2016): 109–25. http://dx.doi.org/10.12989/was.2016.23.2.109.

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7

Aydin, Neslihan, Alper Ozalp, and Irfan Karagoz. "Numerical investigation of heat and flow characteristics in a laminar flow past two tandem cylinders." Thermal Science 25, no. 4 Part A (2021): 2807–18. http://dx.doi.org/10.2298/tsci201119175a.

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Heat and flow characteristics were investigated numerically for a laminar stream past two tandem circular cylinders placed in a channel. The blockage ratios (? = D/H) were chosen to be 0.6, 0.7, and 0.8, respectively, and the gap between the cylinders was varied proportionally to the cylinder diameter as g = 0.2D, 0.7D, 1.5D, and 4D at a low Reynolds number (Re = 40). The effects of the blockage ratio, as well as the gap between two cylinders on heat and flow features were examined in detail. Shear stresses, dimensionless static pressure, heat transfer coefficient, and separation points from the cylinders were determined from the velocity and temperature fields in the flow domain. The results showed that the separation angle decreases with both the blockage ratio and the gap size on the downstream cylinder, whereas heat transfer increases with both the block-age ratio and the gap size on the upstream cylinder.

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Jiang, Ren-Jie. "Flow-induced vibrations of two tandem cylinders in a channel." Thermal Science 16, no. 5 (2012): 1377–81. http://dx.doi.org/10.2298/tsci1205377j.

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We numerically studied flow-induced vibrations of two tandem cylinders in transverse direction between two parallel walls. The effect of the horizontal separation between two cylinders, ranging from 1.1 to 10, on the motions of the cylinders and the flow structures were investigated and a variety of periodic and non-periodic vibration regimes were observed. The results show that when two cylinders are placed in close proximity to each other, compared with the case of an isolated cylinder, the gap flow plays an important role. As the separation ratio is increased, the fluid-structure interaction decouples and the cylinders behave as two isolated cylinders.

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Hsu, Li-Chieh, and Jian-Zhi Ye. "Numerical Study of Flow Patterns in a Tandem Array Cylinder System." International Journal of Applied Mechanics 07, no. 03 (2015): 1550034. http://dx.doi.org/10.1142/s1758825115500349.

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The spectral element method, a direct numerical technique, is used to study the behavior of flow past two cylinders in tandem array. A control cylinder is employed in front of the main cylinder to study the drag reduction performance and flow patterns. Three major flow patterns are found, including single cylinder vortex shedding, two cylinders vortex shedding and suppression. The flow patterns are affected by the distance between two cylinders, Reynolds number and the diameter ratios of cylinders. In a bistable regime, when there is a critical distance between cylinders, drag is reduced dramatically.

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Ho, C. J., G. N. Sou, and Chi-Ming Lai. "Transient Heat Transfer Between Two Horizontal Pipelines in a Heat Tracing Enclosure." Energies 12, no. 8 (2019): 1440. http://dx.doi.org/10.3390/en12081440.

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In this study, a numerical simulation of natural convection between two horizontal differentially heated pipelines inside a circular air-filled enclosure is performed using the finite difference method. The relevant parameters of the problem are the inclinations of the two cylinders (positioned vertically in this study, with the cold cylinder above the hot cylinder), the distance between cylinders and the Rayleigh number. The results show that transient irregular fluctuations in the flow field and heat transfer occur when the Rayleigh number increases or the distance between cylinders decreases. Under the current test conditions, increasing the Rayleigh number significantly increases the average heat transfer coefficient between the cold and hot cylinders.

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Dissertations / Theses on the topic "Flow between two cylinders"

1

Hegseth, John. "Spatiotemporal patterns in flow between two independently rotating cylinders /." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487676847116532.

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Seto, Mae L. "Flow interference effects between two circular cylinders of different diameters." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29762.

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This thesis investigates different examples of action at a distance, namely the interaction of two circular cylinders of different diameters and the interaction of a cylinder with a wall in various arrangements. Action at a distance modifies both the lift and drag of each one of the objects. The fluid flow interaction between a circular cylinder (of diameter D) with a wall, and a circular cylinder with a smaller (¼D) circular cylinder at Reynolds numbers of ≈ 10,000 were of interest. Manifestations of the interactions include mutual changes in the lift and drag forces, phase, onset and frequency of vortex shedding on the circular cylinders/wall. A novel force measurement device for lift and drag of circular cylinders and a data acqusition system was built to realize the above experiments in a water towing tank. The system was capable of simultaneously measuring lift and drag on two circular cylinders with time resolution and correlating these measurements with flow field pictures. Measurements of the lift and drag and phase, onset and frequency of vortex shedding were taken on the large and small cylinder simultaneously as a function of the relative position between itself and the smaller cylinder as the two are towed. These measurements make it possible to map out the areas within the cylinders' sphere of influence and measure the intensity of this influence as a function of the distance between the two cylinders. Every quantity that was mutually altered by the presence of another cylinder is used as measurements of the area of influence for a circular cylinder. It was found in general that the forces act up to a distance of about 3 diameters in the lateral direction. It was also noted that pressure fluctuations at the vortex shedding frequency penetrate into the laminar flow region up to about 3D in the lateral direction. The results agree with existing results for wall/cylinder proximity experiments and flow interference between identical circular cylinders. A novel method to trigger the onset of vortex shedding for towing tanks was also discovered.<br>Science, Faculty of<br>Physics and Astronomy, Department of<br>Graduate

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Jasmine, Hosne Ara. "Hydromagnetic stability of a flow between two co-axial cylinders." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0024/MQ51368.pdf.

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Zakaria, Khaled Yahia. "Flow interaction and heat transfer between two cylinders in a uniform air stream." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=960643664.

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Ali, M. A. "Thermal and MHD effects on the stability of Couette flow between two rotating cylinders." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383882.

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Hird, Lee D. "Analysis of the flow field between two eccentric rotating cylinders in the presence of a slotted sleeve." Curtin University of Technology, School of Mathematics and Statistics, 1997. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=11104.

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Overend et al [68] designed a viscometer to measure the viscosity of slurries that have a tendency to settle. This viscometer consists of a rotating ribbed rotor surrounded by a stationary slotted sleeve; this system is then placed eccentrically within an inclined rotating bowl. It, is claimed that this overcomes most of the difficulties encountered when attempting to obtain accurate measurements for these types of mixtures. If the mixture being sheared within the annulus does not represent the true composition of the slurry being, tested then the results are expected to be inaccurate. The presence of sediment at the bottom of the rotor or the formation of large masses of particles within the flow domain will affect the accuracy of the measurements obtained. This dissertation studies the amount of flow through the slotted sleeve and the region, or regions, of low shear rate within the flow domain. Assuming that end-effects are unimportant and that the slurries can be replaced by a single-phase fluid, three two-dimensional models are proposed. These models are designed to capture the large-slot construction of the sleeve and the, approximate, non-Newtonian behaviour of the slurries. The first two models solve analytically (using a regular perturbation scheme) and numerically (using a finite volume method) the moderate-and large-Reynolds-number flow, and the third model uses a finite volume method to study the flow patterns developed by pseudoplastic fluids. The results show that the mixing of the slurry is expected to be enhanced by moving the concentric system (i.e., the rotor and the slotted sleeve) close to the rotating bowl and using low to moderate speeds for the rotor and bowl. In addition, when the cylinders rotate in the same directions, two (counter-rotating) eddies are present within the flow domain; whereas, only one eddy (rotating counter-clockwise) is ++<br>present when the cylinders rotate in opposite directions. The presence of eddies in the former situation inhibits the flow through the sleeve; while, for moderate rotorspeeds, the flow through the sleeve is enhanced in the latter. When the slurry assumed pseudoplastic, we observe a region of low shear rate located near the dividing streamline present within the flow field. The distribution of shear rate within the flow field is shown to be affected by factors such as the rate of diffusion of the apparent viscosity and the value of the power law index. Therefore, this study suggests that for certain types of slurries, concentrations of particles exist within the domain and that the mixing of slurries can be impeded by the presence of eddies within the main flow field.

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Näsström, David. "Flow- and concentration variation between the cylinders of a diesel engine." Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-10175.

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<p>The demands on tomorrows diesel engines regarding fuel consumption and emission levels keep getting more difficult to fulfill. Due to this fact, the control demand is getting bigger and bigger. To be able to comply with the Euro 6 standards, it is believed that engine control need to be conducted individually from cylinder to cylinder if the need for after-treatment systems should be minimized.</p><p>Scania’s approach to handle emission levels so far has been to use exhaust gas recirculation (EGR). To be able to optimize the use of EGR it is necessary to know how the inert gases, water and carbon dioxide, are distributed between the cylinders. The distribution variation become even more difficult to predict since the EGR is cooled, sometimes leading to condensation of some of the water content. The condensation of water and its behavior in the inlet manifold is studied in this thesis.</p><p>Different ways of measuring non-uniformity in the gas composition between cylinders with respect to EGR in general and water content in particular are evaluated. Using these results, measurements have been conducted on an engine and conclusions are drawn from them.</p><p>The conclusions are that uneven distribution of above all liquid water, due to puddle formation, have an impact on emission formation that should be accounted for in some of the examined operating conditions.</p>

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Yoshida, Hiroaki. "Studies on gas flows between two coaxial circular cylinders on the basis of kinetic theory." 京都大学 (Kyoto University), 2007. http://hdl.handle.net/2433/136189.

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Atilgan, Ahmet Koray. "A Study Of Laminar Forced Film Condensation Of Vapor Flowing In Cross-flow Direction Through The Annular Space Between Two Concentric Cylinders." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607714/index.pdf.

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In this study laminar forced film condensation of vapor flowing in cross-flow direction through the annular space between two concentric cylinders was investigated numerically. To achieve this, governing equations of the vapor and the condensate flow in cross-flow direction between two concentric cylinders were developed. After obtaining the equations in integral forms by using the finite difference technique the vapor boundary layer thicknesses on the inner and outer cylinders and the condensate layer thickness was obtained as a function of the angular position on the cylinders. It was assumed that the condensation took place on the outer surface of the inner cylinder only and the outer cylinder was assumed to be insulated. The computer program developed is capable to calculate the condensate film thickness, vapor boundary layer thickness, the heat flux and the heat transfer coefficient and the interface velocity between the condensate and the vapor layer as a function of the angular position on the cylinders. Effects of changing the free stream velocity flowing in the channel, the radius of the inner cylinder, the temperature difference between the saturated vapor and the wall and the annular space between the concentric cylinders were investigated numerically by using the computer program and the results were presented graphically. Results showed that by increasing the free stream velocity of the vapor in the core, the film thickness decreased and by increasing the radius of the inner cylinder, the temperature difference between the saturated vapor and the wall and the annular space, the film thickness increased.

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Handa, Masato. "Studies on the Bifurcation of Flows between Two Coaxial Circular Cylinders on the Basis of Kinetic Theory of Gases." 京都大学 (Kyoto University), 2004. http://hdl.handle.net/2433/147648.

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Books on the topic "Flow between two cylinders"

1

Li, Xin Kai. Non-isothermal non-Newtonian flow between eccentrically rotating and dynamically moving cylinders. SERCentre, De Montfort University, 1997.

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2

Jia, Laibing. The Interaction Between Flexible Plates and Fluid in Two-dimensional Flow. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-43675-2.

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Ali, Muhammad Iqbal. Effects of flow channel orientation and gap size on adiabatic two-phase flow in a narrow passage between flat plates. National Library of Canada = Bibliothèque nationale du Canada, 1991.

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Pilloni, M. T. A comparison between two LDV systems used to measure the flow field behind a bluff body. von Karman Institute for Fluid Dynamics, 1995.

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Chow, Chuen-Yen. Numerical study of compressible boundary-layer transition between two concentric cylinders: Final report for the period April 15, 1990 - October 31, 1993. National Aeronautics and Space Administration, 1993.

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6

Borri, Claudio, and Claudio Mannini, eds. Aeroelastic Phenomena and Pedestrian-Structure Dynamic Interaction on Non-Conventional Bridges and Footbridges. Firenze University Press, 2010. http://dx.doi.org/10.36253/978-88-6453-202-8.

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Fluid-structure and pedestrian-structure interaction phenomena are extremely important for non-conventional bridges. The results presented in this volume concern: simplified formulas for flutter assessment; innovative structural solutions to increase the aeroelastic stability of long-span bridges; numerical simulations of the flow around a benchmark rectangular cylinder; examples of designs of large structures assisted by wind-tunnel tests; analytical, computational and experimental investigation of the synchronisation mechanisms between pedestrians and footbridge structures. The present book is addressed to a wide audience including professionals, doctoral students and researchers, aiming to increase their know-how in the field of wind engineering, bluff-body aerodynamics and bridge dynamics.

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Kuhn, R. E. The effects of crossflow on the pressures and lift induced by the fountain generated between two impinging jets. National Aeronautics and Space Administration, Ames Research Center, 1998.

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Kuhn, R. E. The effects of crossflow on the pressures and lift induced by the fountain generated between two impinging jets. National Aeronautics and Space Administration, Ames Research Center, 1998.

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Kuhn, R. E. The effects of crossflow on the pressures and lift induced by the fountain generated between two impinging jets. National Aeronautics and Space Administration, 1998.

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Asian-Pacific Tax Conference. (2nd 1984 Singapore). Foreign investment & technology transfer: Fiscal and non-fiscal aspects : country profiles on fiscal and non-fiscal regimes affecting two-way flow of investment and technology transfer between the developed countries and the Asian-Pacific region. Edited by Khan Ahmad and Asian-Pacific Tax and Investment Research Centre. Asian-Pacific Tax and Investment Research Centre, 1985.

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Book chapters on the topic "Flow between two cylinders"

1

Malushte, Malhar Dilip, and Atul Sharma. "CFD Study on Flow Across a Stationary Cylinder in Between Two Counter-Rotating Control Cylinders." In Fluid Mechanics and Fluid Power – Contemporary Research. Springer India, 2016. http://dx.doi.org/10.1007/978-81-322-2743-4_120.

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Djukic, Tijana, and Nenad Filipovic. "Lattice Boltzmann Simulation of Fluid Flow Between Two Rotating Cylinders and Application in Biomedicine." In IFMBE Proceedings. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-73909-6_88.

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Mutabazi, I., H. Peerhossaini, and J. E. Wesfreid. "New Patterns in the Flow Between Two Horizontal Coaxial Rotating Cylinders with Partially Filled Gap." In Springer Series in Synergetics. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73861-6_31.

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More, Bhupendra Singh, Manish Kumar Chauhan, Sushanta Dutta, and Bhupendra Kumar Gandhi. "Investigation of Flow Interference Between Two Inline Square Cylinders With Different Spacing Ratios in Subcritical Reynolds Number Regime." In Fluid Mechanics and Fluid Power – Contemporary Research. Springer India, 2016. http://dx.doi.org/10.1007/978-81-322-2743-4_123.

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Jia, Laibing. "Locomotion Modes of a Plate in the Wake of a Cylinder." In The Interaction Between Flexible Plates and Fluid in Two-dimensional Flow. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-43675-2_6.

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Ohmi, Kazuo, and Kensaku Imaichi. "Vortex Wake Visualizations of Two Circular Cylinders in Parallel." In Flow Visualization VI. Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84824-7_55.

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Chiu, A. Y. W., and N. W. M. Ko. "Simulation of Flow over Two Unequal Square Cylinders." In Science and Art Symposium 2000. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4177-2_35.

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Kumar, Deepak, Kumar Sourav, and Subhankar Sen. "Steady Flow Past Two Square Cylinders in Tandem." In Recent Advances in Theoretical, Applied, Computational and Experimental Mechanics. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1189-9_33.

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Ballal, B. Y., and R. S. Rivlin. "Flow of a viscoelastic fluid between eccentric cylinders." In Collected Papers of R.S. Rivlin. Springer New York, 1997. http://dx.doi.org/10.1007/978-1-4612-2416-7_136.

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Ballal, B. Y., and R. S. Rivlin. "Flow of a viscoelastic fluid between eccentric cylinders." In Collected Papers of R.S. Rivlin. Springer New York, 1997. http://dx.doi.org/10.1007/978-1-4612-2416-7_137.

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Conference papers on the topic "Flow between two cylinders"

1

Huang, J., B. Chen, Y. Ma, and W. Wang. "CIRCULAR FLOW OF MR FLUIDS BETWEEN TWO CYLINDERS." In Proceedings of the Symposium F. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812704344_0054.

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Gu, Xiao-Jun, and David R. Emerson. "THERMALLY INDUCED FLOW BETWEEN TWO MICRO-ECCENTRIC CYLINDERS." In ICHMT International Symposium on Advances in Computational Heat Transfer. Begellhouse, 2017. http://dx.doi.org/10.1615/ichmt.2017.1340.

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Gu, Xiao-Jun, and David R. Emerson. "THERMALLY INDUCED FLOW BETWEEN TWO MICRO-ECCENTRIC CYLINDERS." In ICHMT International Symposium on Advances in Computational Heat Transfer. Begellhouse, 2017. http://dx.doi.org/10.1615/ichmt.2017.cht-7.1340.

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Zheng, Z. Charlie, X. Yang, and N. Zhang. "Flow/Acoustic Characteristics for Flow Over Two Tandem Cylinders." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15807.

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Flow over two tandem cylinders is simulated using an immersed-boundary method. Cases with different distances between the cylinders are investigated. The flow field is then used to provide information to analyze the pressure fluctuations both in the cylinders (assumed rigid and hollow) and at the far field. The results show that the downstream cylinder pertains higher levels of pressure fluctuations both inside the cylinder and at far field than the upstream cylinder. When the distance between the cylinders increases from the quasi-reattachment flow pattern to the critical regime, the pressure fluctuation levels from the downstream cylinder increase significantly. The spectral analysis reveals only one significant peak at the frequency of twice of the corresponding Strouhal number for the far-field acoustics, but two peaks at the frequencies of both the Strouhal number itself and twice of it for pressure fluctuations inside the cylinders.

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Gao, F., C. G. Mingham, D. M. Causon, Jiachun Li, and Song Fu. "Numerical Simulation of Flow Interference Between Two Circular Cylinders." In RECENT PROGRESSES IN FLUID DYNAMICS RESEARCH: Proceeding of the Sixth International Conference on Fluid Mechanics. AIP, 2011. http://dx.doi.org/10.1063/1.3651907.

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Mahbub Alam, Md, and Y. Zhou. "Interference Between Two Tandem Cylinders of Different Diameters." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93832.

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This paper presents a detailed investigation of Strouhal frequencies, forces and flow structures resulting from the interference between two tandem cylinders of different diameters. The upstream cylinder diameter (d) was varied from 25 mm to 6 mm, while the downstream cylinder diameter (D) of 25 mm was unchanged, the corresponding diameter ratio, d/D, being 1.0 ∼ 0.24. The spacing between the cylinders was 5.5d. At this spacing, the shear layers separated from the upstream cylinder roll up alternately, forming a vortex street in the gap between and behind the cylinders. Two dominant frequencies are detected behind the downstream cylinder at d/D = 1.0 ∼ 0.4. One is the same as detected between the cylinders, and the other is of relatively low frequency and is probably generated by the downstream cylinder. Whilst the former remains unchanged, the latter increases with decreasing d/D, due to an increase in the incident flow velocity of the downstream cylinder. The time-averaged drag on the downstream cylinder also increases with decreasing d/D, though the fluctuating forces drop because vortices impinging upon the downstream cylinder are impaired by decreasing d/D.

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Qin, Bin, Md Mahbub Alam, and Yang Liu. "Fluid-Structure Interaction Between Two Tandem Cylinders: Flow-Induced Vibrations." In Proceedings of the Advances in Technology, Engineering and Computing A Multinational Colloquium - 2017. Research Publishing Services, 2017. http://dx.doi.org/10.3850/978-981-11-0744-3_c17-08.

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A´ssi, Gustavo R. S., Julio R. Meneghini, Jose´ A. P. Aranha, Peter W. Bearman, Bruno S. Carmo, and Enrique Casaprima. "Experimental Investigation of Flow-Induced Vibrations Interference Between Two Circular Cylinders in Tandem Arrangements." In ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2005. http://dx.doi.org/10.1115/omae2005-67121.

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This paper presents experimental results concerning flow-induced oscillations of rigid-circular cylinders in tandem. Preliminary results are presented: new measurements on the dynamic response oscillations of an isolated cylinder and flow interference of two cylinders in tandem are shown. The oscillations are due to vortex-induced vibrations (VIV). Models are mounted on an elastic base fitted with flexor blades and instrumented with strain gages. The base is fixed on the test section of a water channel facility. The flexor blades possess a low damping characteristic [ζ ≈ 0.008 and less] and they are free to oscillate only in the cross-flow direction. The Reynolds number of the experiments is from 3,000 to 13,000 and reduced velocities, based on natural frequency in still water, range up to 12. The interference phenomenon on flow-induced vibrations can be investigated by conducting experiments in two ways: first, the upstream cylinder is maintained fixed and the downstream one is mounted on the elastic base; subsequently, an investigation will be carried out letting both cylinders oscillate transversally. The results for an isolated cylinder are in accordance with other measurements in the literature for m* ≈ 2 and m* ≈ 8. For the tandem arrangement (m* ≈ 2), the trailing cylinder oscillation presents what previous researchers have termed interference galloping behaviour for a centre-to-centre gap spacing ranging from 3·0D to 5·6D. These initial results validate the experimental set up and lead the way for future work; including tandem, staggered and side-by-side arrangements with the two cylinders free to move.

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Jaroslav, Štigler, and Fialová Simona. "Bingham liquid flow between two cylinders induced by inner ring rotation." In 36TH MEETING OF DEPARTMENTS OF FLUID MECHANICS AND THERMODYNAMICS. Author(s), 2017. http://dx.doi.org/10.1063/1.5004374.

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Su, Zhongdi, Yang Liu, and Ronald M. C. So. "Two Staggered Elastic Cylinders in a Cross Flow." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32183.

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Two staggered elastic cylinders in a cross flow have been numerically studied. The inclined angles change from 0° to 90° at 15° degree interval while the spacing ratio is maintained at 1.5. The two cylinders are mounted at the ends and are free to move under the action of the unsteady flow-induced forces. The present approach solves the flow field using a finite element method and models the cylinder motions using a two-degree-of-freedom structural dynamics model. Two different cases are considered; one is the rigid case where the cylinders are still, and the other is the elastic case where the cylinders undergo oscillations. Good agreement for the rigid case is obtained between the present 2-D calculations and the previously published data. The investigation also examines the influence of the inclined angle on the vibrations of the cylinders and their spectral analysis.

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Reports on the topic "Flow between two cylinders"

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Chenoweth, D. R., and S. Paolucci. Compressible flow of a multiphase fluid between two vessels:. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6490422.

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Ayala-García, Jhorland, Sandy Dall'erba, and William C. Ridley. Externalities of extreme natural disasters on local tax capacity. Banco de la República de Colombia, 2021. http://dx.doi.org/10.32468/dtseru.299.

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This paper studies the impact of extreme weather events on the local tax revenue across Colombian municipalities. We follow a two-step approach to evaluate to what extent a municipality’s tax revenue depends on natural disasters taking place both locally and in its trade partners. In the first step, we estimate a gravity model of bilateral trade and construct a trade flow matrix allowing us to measure the strength of the economic relationships between cities. To do so, we build a novel dataset describing the inter-city trade flows for road transported goods in Colombia for the period 2015–2019. In the second step, we use spatial models to estimate the externalities of extreme weather events. Our results reveal that natural disasters in the destination cities increase the tax revenue in the origin city. We provide evidence of the capacity of trade to mitigate the negative effects of natural disasters.

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Mohammadian, Abolfazl, Amir Bahador Parsa, Homa Taghipour, Amir Davatgari, and Motahare Mohammadi. Best Practice Operation of Reversible Express Lanes for the Kennedy Expressway. Illinois Center for Transportation, 2021. http://dx.doi.org/10.36501/0197-9191/21-033.

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Reversible lanes in Chicago’s Kennedy Expressway are an available infrastructure that can significantly improve traffic performance; however, a special focus on congestion management is required to improve their operation. This research project aims to evaluate and improve the operation of reversible lanes in the Kennedy Expressway. The Kennedy Expressway is a nearly 18-mile-long freeway in Chicago, Illinois, that connects in the southeast to northwest direction between the West Loop and O’Hare International Airport. There are two approximately 8-mile reversible lanes in the Kennedy Expressway’s median, where I-94 merges into I-90, and there are three entrance gates in each direction of this corridor. The purpose of the reversible lanes is to help the congested direction of the Kennedy Expressway increase its traffic flow and decrease the delay in the whole corridor. Currently, experts in a control location switch the direction of the reversible lanes two to three times per day by observing real-time traffic conditions captured by a traffic surveillance camera. In general, inbound gates are opened and outbound gates are closed around midnight because morning traffic is usually heavier toward the central city neighborhoods. In contrast, evening peak-hour traffic is usually heavier toward the outbound direction, so the direction of the reversible lanes is switched from inbound to outbound around noon. This study evaluates the Kennedy Expressway’s current reversing operation. Different indices are generated for the corridor to measure the reversible lanes’ performance, and a data-driven approach is selected to find the best time to start the operation. Subsequently, real-time and offline instruction for the operation of the reversible lanes is provided through employing deep learning and statistical techniques. In addition, an offline timetable is also provided through an optimization technique. Eventually, integration of the data-driven and optimization techniques results in the best practice operation of the reversible lanes.

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