Log in

Relevant bibliographies by topics / Characteristics of Slug Flow

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers
Reports

Academic literature on the topic 'Characteristics of Slug Flow'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Characteristics of Slug Flow.'

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

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

Journal articles on the topic "Characteristics of Slug Flow"

1

HATAKEYAMA, Nobuo, and Karoku NODA. "Flow Characteristics of Slug Flow." Journal of the Mining Institute of Japan 103, no. 1197 (1987): 785–91. http://dx.doi.org/10.2473/shigentosozai1953.103.1197_785.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Gopal, M., and W. P. Jepson. "The Study of Dynamic Slug Flow Characteristics Using Digital Image Analysis—Part I: Flow Visualization." Journal of Energy Resources Technology 120, no. 2 (June 1, 1998): 97–101. http://dx.doi.org/10.1115/1.2795032.

Full text

Abstract:

This paper reports the application of novel, digital image analysis techniques in the study of slug flow characteristics, under dynamic conditions in two-phase gas-liquid mixtures. Water and an oil of viscosity 18 cP were used for the liquid phase and carbon dioxide was used for the gas phase. Flow in a 75-mm i.d., 10-m long acrylic pipeline system was studied. Images of slugs were recorded on video by S-VHS cameras, using an audio-visual mixer. Each image was then digitized frame-by-frame and analyzed on a SGI™ workstation. Detailed slug characteristics, including liquid film heights, slug translational velocity, mixing length, and, slug length, were obtained.

APA, Harvard, Vancouver, ISO, and other styles

3

Al-safran, Eissa M., Yehuda Taitel, and James P. Brill. "Prediction of Slug Length Distribution Along a Hilly Terrain Pipeline Using Slug Tracking Model." Journal of Energy Resources Technology 126, no. 1 (March 1, 2004): 54–62. http://dx.doi.org/10.1115/1.1649971.

Full text

Abstract:

Accurate prediction of slug length distribution and the maximum slug length in a hilly terrain pipeline is crucial for designing downstream separation facilities. A hilly terrain pipeline consists of interconnected uphill and downhill pipe sections, where slugs can dissipate in the downhill sections and grow in the uphill sections. Furthermore, new slugs can be generated at the dips (bottom elbows) and dissipate at the top elbows. Although existing steady-state models are capable of predicting the average slug length for pressure drop calculations and pipeline design, they are incapable of predicting detailed flow characteristics such as the maximum slug length expected at the exit of a hilly terrain pipeline. A transient slug tracking model based on a quasi-equilibrium formulation was developed to track the front and back of each individual slug, from which individual slug lengths are calculated. The model was verified with large-scale two-phase flow hilly terrain experimental data acquired at the Tulsa University Fluid Flow Projects (TUFFP). The results show a fairly accurate match between the model predictions and experimental data.

APA, Harvard, Vancouver, ISO, and other styles

4

Zhang, Hong-Quan, Eissa M. Al-Safran, Subash S. Jayawardena, Clifford L. Redus, Cem Sarica, and James P. Brill. "Modeling of Slug Dissipation and Generation in Gas-Liquid Hilly-Terrain Pipe Flow." Journal of Energy Resources Technology 125, no. 3 (August 29, 2003): 161–68. http://dx.doi.org/10.1115/1.1580847.

Full text

Abstract:

Hilly-terrain pipelines consist of interconnected horizontal, uphill and downhill sections. Slug flow experiences a transition from one state to another as the pipe inclination angle changes. Normally, slugs dissipate if the upward inclination becomes smaller or the downward inclination becomes larger, and slug generation occurs vice versa. Appropriate prediction of the slug characteristics is crucial for the design of pipeline and downstream facilities. In this study, slug dissipation and generation in a valley pipeline configuration (horizontal-downhill-uphill-horizontal) were modeled by use of the method proposed by Zhang et al. The method was developed from the unsteady continuity and momentum equations for two-phase slug flow by considering the entire film zone as the control volume. Computed results are compared with experimental measurements at different air-mineral oil flow rate combinations. Good agreement is observed for the change of slug body length to slug unit length ratio.

APA, Harvard, Vancouver, ISO, and other styles

5

Kang, C., W. P. Jepson, and M. Gopal. "Effect of Drag-Reducing Agent on Slug Characteristics in Multiphase Flow in Inclined Pipes." Journal of Energy Resources Technology 121, no. 2 (June 1, 1999): 86–90. http://dx.doi.org/10.1115/1.2795073.

Full text

Abstract:

The effect of drag-reducing agent (DRA) on multiphase flow in upward and downward inclined pipes has been studied. The effect of DRA on pressure drop and slug characteristics such as slug translational velocity, the height of the liquid film, slug frequency, and Froude number have been determined. Experiments were performed in 10-cm i.d., 18-m long plexiglass pipes at inclinations of 2 and 15 deg for 50 percent oil-50 percent water-gas. The DRA effect was examined for concentrations ranging from 0 to 50 ppm. Studies were done for superficial liquid velocities between 0.5 and 3 m/s and superficial gas velocities between 2 and 10 m/s. The results indicate that the DRA was effective in reducing the pressure drop for both upflow and downflow in inclined pipes. Pressure gradient reduction of up to 92 percent for stratified flow with a concentration of 50 ppm DRA was achieved in ±2 deg downward inclined flow. The effectiveness of DRA for slug flow was 67 percent at a superficial liquid velocity of 0.5 m/s and superficial gas velocity of 2 m/s in 15 deg upward inclined pipes. Slug translational velocity does not change with DRA concentrations. The slug frequency decreases from 68 to 54 slugs/min at superficial liquid velocity of 1 m/s and superficial gas velocity of 4 m/s in 15 deg upward inclined pipes as the concentration of 50 ppm was added. The height of the liquid film decreased with the addition of DRA, which leads to an increase in Froude number.

APA, Harvard, Vancouver, ISO, and other styles

6

Zhang, Hong-Quan, Qian Wang, Cem Sarica, and James P. Brill. "Unified Model for Gas-Liquid Pipe Flow via Slug Dynamics—Part 1: Model Development." Journal of Energy Resources Technology 125, no. 4 (November 18, 2003): 266–73. http://dx.doi.org/10.1115/1.1615246.

Full text

Abstract:

A unified hydrodynamic model is developed for predictions of flow pattern transitions, pressure gradient, liquid holdup and slug characteristics in gas-liquid pipe flow at all inclination angles from −90° to 90° from horizontal. The model is based on the dynamics of slug flow, which shares transition boundaries with all the other flow patterns. By use of the entire film zone as the control volume, the momentum exchange between the slug body and the film zone is introduced into the momentum equations for slug flow. The equations of slug flow are used not only to calculate the slug characteristics, but also to predict transitions from slug flow to other flow patterns. Significant effort has been made to eliminate discontinuities among the closure relationships through careful selection and generalization. The flow pattern classification is also simplified according to the hydrodynamic characteristics of two-phase flow.

APA, Harvard, Vancouver, ISO, and other styles

7

Elfaki, Mohamed, Mohammad Shakir Nasif, and Masdi Muhammad. "Effect of Changing Crude Oil Grade on Slug Characteristics and Flow Induced Mechanical Stresses in Pipes." Applied Sciences 11, no. 11 (June 4, 2021): 5215. http://dx.doi.org/10.3390/app11115215.

Full text

Abstract:

Slug multiphase flow is known to be the most prevalent regime because of its extensive encounters associated with chaotic behaviour, complexity and instability that cause significant fluctuations in operating conditions and thus lead to undesirable effects. In this study, the effect of varying crude oil grades on slug characteristics is numerically investigated. A partitioned one-way coupling framework of fluid–structure interaction (FSI) one-way coupling framework is adopted to investigate the influence of changing oil grades and slug characteristics on the maximum induced stresses in horizontal carbon steel pipe. It was found that increasing crude oil density causes frequent slugging and promotes the formation of liquid slugs further upstream near the inlet with high translational velocity and short wavelength. Therefore, the maximum induced stresses resulting from the interaction between slugs and the inner surface of pipes are strongly dependent on crude oil grade. In modelling extra heavy crude oil, a 40% increase in maximum induced stresses is recorded when the liquid superficial velocity decreases from 1 to 0.86 m/s at a constant natural gas superficial velocity.

APA, Harvard, Vancouver, ISO, and other styles

8

King, M. J. S., C. P. Hale, C. J. Lawrence, and G. F. Hewitt. "Characteristics of flowrate transients in slug flow." International Journal of Multiphase Flow 24, no. 5 (August 1998): 825–54. http://dx.doi.org/10.1016/s0301-9322(97)00088-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

McClusky, Heather L., Mary V. Holloway, Donald E. Beasley, and Jay M. Ochterbeck. "Continuous Wavelet Transforms of Instantaneous Wall Pressure in Slug and Churn Upward Gas-Liquid Flow." Journal of Fluids Engineering 124, no. 3 (August 19, 2002): 625–33. http://dx.doi.org/10.1115/1.1490376.

Full text

Abstract:

Continuous wavelet transforms are employed to determine the time-localized frequency content (scalogram) of instantaneous wall pressure signals in upward gas-liquid flow. The flow conditions correspond to well-defined slug flow, well-defined churn flow, and flows near the transition from slug-to-churn flow. Scalograms demonstrate that the frequency content of the pressure signals is time-dependent, and visual observations of the flow conditions suggest that the time-dependent frequencies are related to identifiable physical behaviors of the flow. In well-defined slug flow, the scalograms are characterized by the presence of a dominant frequency throughout the duration of the signal and by frequency shifting events. Scalograms representing well-defined churn flow contain intermittent frequencies, and the energy density in churn flow is spread over a wider range of frequencies than in slug flow. The present results provide evidence that flows near transition alternately display characteristics of both well-defined slug and well-defined churn flows.

APA, Harvard, Vancouver, ISO, and other styles

10

Vaze, M. J., and J. Banerjee. "Experimental visualization of two-phase flow patterns and transition from stratified to slug flow." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 2 (June 20, 2010): 382–89. http://dx.doi.org/10.1243/09544062jmes2033.

Full text

Abstract:

The transition from stratified to slug flow generates oscillations in pressure and flowrates. Large liquid surges associated with slug flow are detrimental to the operation of process equipments involving two-phase flow. The characterization of two-phase flow regimes and their transition is thus an important area of research. In the present work, flow patterns for various regimes of air—water two-phase flow are captured experimentally. A flow pattern map is established based on the visualized images. The developed flow regime map is compared with that obtained by Ghajar and Tang. Slug frequency is recorded for a variety of superficial Reynolds number to show the instances of impact pressure. The development of slug and transition to slug flow from stratified flow are analysed using these captured images. It is observed that slug becomes highly chaotic with dispersion of air bubbles, when gas superficial Reynolds number is increased for a fixed value of liquid superficial Reynolds number. For lower gas superficial Reynolds number, the slug is observed to be very clear (without air entrainment). This is true for higher value of liquid superficial Reynolds number as well. The air entrainment increases with increasing gas superficial Reynolds number. This air entrainment might play a dominant role in deciding the flow and thermal characteristics of such two-phase flows.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Characteristics of Slug Flow"

1

Maley, Jeff. "Slug flow characteristics and corrosion rates in inclined high pressure multiphase flow pipes." Ohio : Ohio University, 1997. http://www.ohiolink.edu/etd/view.cgi?ohiou1203365261.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Zhou, Xianling. "Experimental study of corrosion rate and slug flow characteristics in horizontal, multiphase pipeline." Ohio : Ohio University, 1993. http://www.ohiolink.edu/etd/view.cgi?ohiou1176318733.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Maley, Lisa. "A study of slug flow characteristics in large diameter horizontal multiphase pipelines." Ohio : Ohio University, 1997. http://www.ohiolink.edu/etd/view.cgi?ohiou1177090588.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Daas, Mutaz A. "Modeling the effects of oil viscosity and pipe inclination on flow characteristics and drag reduction in slug flow." Ohio : Ohio University, 2001. http://www.ohiolink.edu/etd/view.cgi?ohiou1179160070.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Menezes, Richard Joseph. "An experimental study of corrosion inhibitor performance and slug flow characteristics in horizontal multiphase pipelines." Ohio : Ohio University, 1994. http://www.ohiolink.edu/etd/view.cgi?ohiou1178135456.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Kaul, Ashwini. "Study of Slug Flow Characteristics and Performance of Corrosion Inhibitors, in Multiphase Flow, in Horizontal Oil and Gas Pipelines." Ohio University / OhioLINK, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1203978425.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Xie, Qingqing. "Study on mass transfer and turbulence in large pipe flow using limiting current density technique." Ohio University / OhioLINK, 1997. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1184606447.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Beyer, Matthias, Dirk Lucas, Heiko Pietruske, and Lutz Szalinski. "Two-Phase Flow Experiments on Counter-Current Flow Limitation in a model of the Hot Leg of a Pressurized Water Reactor (2015 test series)." Helmholtz-Zentrum Dresden-Rossendorf, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-216094.

Full text

Abstract:

Counter-Current Flow Limitation (CCFL) is of importance for PWR safety analyses in several accident scenarios connected with loss of coolant. Basing on the experiences obtained during a first series of hot leg tests now new experiments on counter-current flow limitation were conducted in the TOPFLOW pressure vessel. The test series comprises air-water tests at 1 and 2 bar as well as steam-water tests at 10, 25 and 50 bar. During the experiments the flow structure was observed along the hot leg model using a high-speed camera and web-cams. In addition pressure was measured at several positions along the horizontal part and the water levels in the reactor-simulator and steam-generator-simulator tanks were determined. This report documents the experimental setup including the description of operational and special measuring techniques, the experimental procedure and the data obtained. From these data flooding curves were obtained basing on the Wallis parameter. The results show a slight shift of the curves in dependency of the pressure. In addition a slight decrease of the slope was found with increasing pressure. Additional investigations concern the effects of hysteresis and the frequencies of liquid slugs. The latter ones show a dependency on pressure and the mass flow rate of the injected water. The data are available for CFD-model development and validation.

APA, Harvard, Vancouver, ISO, and other styles

9

Ogazi, Anayo Isaac. "Multiphase severe slug flow control." Thesis, Cranfield University, 2011. http://dspace.lib.cranfield.ac.uk/handle/1826/8345.

Full text

Abstract:

Severe slug flow is one of the most undesired multiphase flow regimes, due to the associated instability, which imposes major challenges to flow assurance in the oil and gas industry. This thesis presents a comprehensive analysis of the systematic approach to achieving stability and maximum production from an unstable riser-pipeline system. The development of a plant-wide model which comprises an improved simplified riser model (ISRM) required for severe slug controller design and control performance analysis is achieved. The ability of the ISRM to predict nonlinear stability of the unstable riser-pipeline is investi¬gated using an industrial riser and a 4 inch laboratory riser system. Its predic¬tion of the nonlinear stability showed close agreement with experimental and simulation results. Through controllability analysis of the unstable riser-pipeline system, which is focused on achieving the core operational targets of the riser-pipeline produc¬tion system, the maximum stable valve opening achievable with each controlled variable considered is predicted and confirmed through the simulation results. The potential to increase oil production through feedback control is presented by analysing the pressure production relationship using a pressure dependent dimensionless variable known as Production Gain Index (PGI). The performance analyses of three active slug controllers are presented to show that the ability of a slug controller to achieve closed loop stability at large valve opening can be assessed by the analysis of the H∞ norm of the comple¬mentary sensitivity function of the closed loop system, T(s) ∞. A slug controller which achieves the lowest value of the T(s) ∞, will achieve closed loop stability at a larger valve opening. Finally, the development of a new improved relay auto-tuned slug controller algorithm based on a perturbed first-order-plus dead-time (FOPDT) model of the riser system is achieved. Its performance showed that it has the ability to stabilise the riser system at a valve opening that is larger than that achieved with the original (conventional) algorithm with about 4% increase in production.

APA, Harvard, Vancouver, ISO, and other styles

10

Inyiama, Fidelis Chidozie. "Active control of hydrodynamic slug flow." Thesis, Cranfield University, 2013. http://dspace.lib.cranfield.ac.uk/handle/1826/7996.

Full text

Abstract:

Multiphase flow is associated with concurrent flow of more than one phase (gas-liquid, liquid-solid, or gas-liquid-solid) in a conduit. The simultaneous flow of these phases in a flow line, may initiate a slug flow in the pipeline. Hydrodynamic slug flow is an alternate or irregular flow with surges of liquid slug and gas pocket. This occurs when the velocity difference between the gas flow rate and liquid flow rate is high enough resulting in an unstable hydrodynamic behaviour usually caused by the Kelvin-Helmholtz instability. Active feedback control technology, though found effective for the control of severe slugs, has not been studied for hydrodynamic slug mitigation in the literature. This work extends active feedback control application for mitigating hydrodynamic slug problem to enhance oil production and recovery. Active feedback Proportional-Integral (PI) control strategy based on measurement of pressure at the riser base as controlled variable with topside choking as manipulated variable was investigated through Olga simulation in this project. A control system that uses the topside choke valve to keep the pressure at the riser base at or below the average pressure in the riser slug cycle has been implemented. This has been found to prevent liquid accumulation or blockage of the flow line. OLGA (olga is a commercial software widely tested and used in oil and gas industries) has been used to assess the capability of active feedback control strategy for hydrodynamic slug control and has been found to give useful results and most interestingly the increase in oil production and recovery. The riser slugging was suppressed and the choke valve opening was improved from 5% to 12.65% using riser base pressure as controlled variable and topside choke valve as the manipulated variable for the manual choking when compared to the automatic choking in a stabilised operation, representing an improvement of 7.65% in the valve opening. Secondly, implementing active control at open-loop condition reduced the riser base pressure from 15.3881bara to 13.4016bara.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Books on the topic "Characteristics of Slug Flow"

1

Glimm, James. The laminar to slug flow transition in Hele-Shaw flow. New York: Courant Institute of Mathematical Sciences, New York University, 1989.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

2

Butler, James J. The design, performance, and analysis of slug tests. Boca Raton, Fla: Lewis, 1998.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

3

D, Istok J., ed. Aquifer testing: Design and analysis of pumping and slug tests. Chelsea, Mich: Lewis Publishers, 1991.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

4

Telis, Pamela A. Low-flow and flow-duration characteristics of Mississippi streams. Jackson, Miss: Dept. of the Interior, U.S. Geological Survey, 1991.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

5

Atkins, J. B. Low-flow and flow-duration characteristics of Alabama streams. Tuscaloosa, Ala: U.S. Dept. of the Interior, U.S. Geological Survey, 1994.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

6

B, Atkins J. Low-flow and flow-duration characteristics of Alabama streams. Tuscaloosa, Ala: U.S. Dept. of the Interior, U.S. Geological Survey, 1994.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

7

B, Atkins J. Low-flow and flow-duration characteristics of Alabama streams. Tuscaloosa, Ala: U.S. Dept. of the Interior, U.S. Geological Survey, 1994.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

8

Telis, Pamela A. Low-flow and flow-duration characteristics of Mississippi streams. Jackson, Miss: Dept. of the Interior, U.S. Geological Survey, 1991.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

9

Atkins, J. B. Low-flow and flow-duration characteristics of Alabama streams. Tuscaloosa, Ala: U.S. Dept. of the Interior, U.S. Geological Survey, 1994.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

10

Telis, Pamela A. Low-flow and flow-duration characteristics of Mississippi streams. Jackson, Miss: Dept. of the Interior, U.S. Geological Survey, 1991.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Book chapters on the topic "Characteristics of Slug Flow"

1

Han, Guo-qing, Shu-zhe Shi, Xiao-dong Wu, Cheng-cheng You, Xue-qi Cen, Zu-guo Zhang, Zhi-yong Zhu, Ke Sun, and Yi-chen Tao. "Characteristics Analysis and Slug Flow Model in Undulated Wellbore." In Proceedings of the International Petroleum and Petrochemical Technology Conference 2019, 190–203. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-0860-8_15.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Fabre, Jean. "Gas-Liquid Slug Flow." In Modelling and Experimentation in Two-Phase Flow, 117–56. Vienna: Springer Vienna, 2003. http://dx.doi.org/10.1007/978-3-7091-2538-0_3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

An, Chen, Menglan Duan, Segen F. Estefen, and Jian Su. "Pipes Conveying Horizontal Slug Flow." In Structural and Thermal Analyses of Deepwater Pipes, 141–53. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53540-7_10.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

An, Chen, Menglan Duan, Segen F. Estefen, and Jian Su. "Pipes Conveying Vertical Slug Flow." In Structural and Thermal Analyses of Deepwater Pipes, 125–39. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53540-7_9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Sudarshan, V. J., D. Arpitha, Y. T. Thilak Kumar, C. Rajasekaran, and Nagesh Puttaswamy. "Investigations on Flow Characteristics of Mortars Using Partial Replacement of Fine Aggregates with Processed Granulated Blast Furnace Slag." In Lecture Notes in Civil Engineering, 481–89. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5644-9_36.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Benítez-Centeno, O. C., O. Cazarez-Candia, and S. L. Moya-Acosta. "Experimental Study of the Slug Flow." In Experimental and Theoretical Advances in Fluid Dynamics, 287–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17958-7_23.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Fabre, J., A. Liné, and E. Gadoin. "Void and Pressure Waves in Slug Flow." In IUTAM Symposium on Waves in Liquid/Gas and Liquid/Vapour Two-Phase Systems, 25–44. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0057-1_2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Benítez-Centeno, O. C., O. Cazarez-Candia, and S. L. Moya-Acosta. "Slug Flow Model Using the Two Fluid Approach." In Experimental and Theoretical Advances in Fluid Dynamics, 295–302. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17958-7_24.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Nonaka, Ikujiro, Ryoko Toyama, Toru Hirata, Susan J. Bigelow, Ayano Hirose, and Florian Kohlbacher. "The Characteristics of Knowledge." In Managing Flow, 6–17. London: Palgrave Macmillan UK, 2008. http://dx.doi.org/10.1057/9780230583702_2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Gulia, Rohit Singh, Siddharth Sharma, and Jyotirmay Banerjee. "Stability Analysis of Two-Phase Slug Flow Using OpenFOAM." In Lecture Notes in Mechanical Engineering, 471–79. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0698-4_51.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Characteristics of Slug Flow"

1

Carneiro, J. N. E., and A. O. Nieckele. "Investigation of slug flow characteristics in inclined pipelines." In MULTIPHASE FLOW 2007. Southampton, UK: WIT Press, 2007. http://dx.doi.org/10.2495/mpf070181.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

AbdulKareem, Lokman A., S. Sharaf, Barry J. Azzopardi, and Andrew Hunt. "Effect of Inclination on Slug Flow Characteristics." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38119.

Full text

Abstract:

Modern oil/gas well drilling methods in particular in the offshore industry involve deviated drilling in which the production tubing can be inclined at any angle between the vertical and the horizontal. Riser tubes from the seabed to the surface or to floating production vessels (FPSO) will also rarely be exactly vertical. This work describes a study carried out at the University Of Nottingham on the effects of inclination on gas / liquid slug flow. Two advanced tomography techniques were applied simultaneously to the flow of a mixture of air and silicone oil in a 67 mm internal diameter pipe and the pipe was inclined at various angles. A twin plane Electrical Capacitance Tomography (ECT) electrode system driven by Tomoflow electronics was positioned below a Capacitance Wire Mesh Sensor (WMS) developed at Forschungszentrum Rossendorf-Dresden/Germany M. J. Da Silva et al [2]. This enabled an examination of the flow to be carried out at several levels of complexity. Both measuring sensors provide time and cross-sectionally resolved information about the spatial distribution of the phases. Conditions studied were superficial velocities for air ranged from 0.05 to 5.5 m/s and for silicone oil ranged from 0.0 m/s to 0.5 m/s. In present paper, the effect of inclination on the phase distribution in two phase gas liquid slug flow is presented. The liquid hold up within the slug region and in the elongated bubble zone and the averaged liquid hold up were calculated from the output data of the two measurements techniques. Radial gas volume fraction profiles and bubble size distributions were also processed from the wire-mesh sensor data. The shapes of the large bubbles and waves were compared for different inclination angles. The results indicate that the pipe inclination has a significant effect on the slug flow characteristics. Both Taylor bubble and small bubbles in the slug region tend to flow along the upper pipe wall and causing significant variation of Taylor bubble rise velocity with inclination angle.

APA, Harvard, Vancouver, ISO, and other styles

3

Zheng, Guohua, J. P. Brill, and Ovadia Shoham. "Hilly Terrain Effects on Slug Flow Characteristics." In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 1993. http://dx.doi.org/10.2118/26566-ms.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Walsh, P. A., E. J. Walsh, and Y. S. Muzychka. "Laminar Slug Flow: Heat Transfer Characteristics With Constant Heat Flux Boundary." In ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/ht2009-88428.

Full text

Abstract:

The problem of elevated heat flux in modern electronics has led to the development of numerous liquid cooling devices which yield superior heat transfer coefficients over their air based counterparts. This study investigates the use of liquid/gas slug flows where a liquid coolant is segregated into discrete slugs, resulting in a segmented flow, and heat transfer rates are enhanced by an internal circulation within slugs. This circulation directs cooler fluid from the center of the slug towards the heated surface and elevates the temperature difference at the wall. An experimental facility is built to examine this problem in circular tube flow with a constant wall heat flux boundary condition. This was attained by Joule heating a thin walled stainless steel tube. Water was used as the coolant and air as the segregating phase. The flow rates of each were controlled using high precision syringe pumps and a slug producing mechanism was introduced for segmenting the flow into slugs of various lengths at any particular flow rate. Tube flows with Reynolds numbers in the range 10 to 1500 were examined ensuring a well ordered segmented flow throughout. Heat transfer performance was calculated by measuring the exterior temperature of the thin tube wall at various locations using an Infrared camera. Nusselt number results are presented for inverse Graetz numbers over four decades, which spans both the thermally developing and developed regions. The results show that Nu in the early thermally developing region are slightly inferior to single phase flows for heat transfer performance but become far superior at higher values of inverse Gr. Additionally, the slug length plays an important role in maximizing Nusselt number in the fully developed region as Nu plateaus at different levels for slugs of differing lengths. Overall, this paper provides a new body of experimental findings relating to segmented flow heat transfer in constant heat flux tubes without boiling. Put abstract text here.

APA, Harvard, Vancouver, ISO, and other styles

5

Abdulkadir, M., V. Hernandez-Perez, L. Abdulkareem, I. S. Lowndes, and B. J. Azzopardi. "Characteristics of Slug Flow in a Vertical Riser." In Nigeria Annual International Conference and Exhibition. Society of Petroleum Engineers, 2010. http://dx.doi.org/10.2118/140681-ms.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Bagci, Suat, and Adel Al-Shareef. "An Investigation of Slug Flow in Hilly Terrain Pipelines." In ASME 2001 Engineering Technology Conference on Energy. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/etce2001-17063.

Full text

Abstract:

Abstract Two-phase flow in hilly terrain pipelines can cause significant practical operating problems. When slugs flow in a hilly terrain pipeline that contains sections of different inclinations they undergo a change of length and slug flow characteristics as the slug move from section to section. In addition, slugs can be generated at low elbows, dissipate at top elbows and shrink or grow in length as they travel along the pipe. A mathematical model and a computer program was developed to simulate these phenomena. The model was based on the sink/source concept at the pipeline connections. A connection between two pipeline sections of different slopes was conveniently called elbow. An elbow accumulates liquid as a sink, and releases liquid as a source. The sink/source has a characteristic capacity of its own. This capacity is positive if the liquid can indeed be accumulated at the elbow or negative if the liquid is actually drained away from the elbow. This type of treatment effectively isolates the flow upstream from an elbow from that downstream, while still allowing flow interactions between two detailed pipeline sections. The hydrodynamic flow model was also used to calculate the film liquid holdup in horizontal and inclined pipelines. The model can successfully predict the liquid film holdup if the liquid film height is assumed to be uniform through the gas pocket. Many other models were used to calculate all the needed parameters to perform the sink/source model. The overall effect of a hill or terrain on slug flow depends on the operating flow rates and pipeline configurations. For special case of near constant slug frequency corresponding to moderately high superficial liquid and gas velocities, this effect was found to be small. The changes in the film characteristics between two adjacent pipeline sections were found to be mostly responsible for the pseudo-slug generation, slug growth and dissipation in the downstream pipeline sections. The film liquid holdup decreased with increasing pipe diameter. The unit slug length increased at the upstream inclined pipes and decreased at the downstream inclined pipes with increasing pipe diameter. The possibility of pseudo-slug generation was increased at large pipe diameters even at high sink capacities. At low sink capacities, no pseudo-slugs were generated at high superficial velocities. The slug flow characteristics was more effected by low superficial gas and liquid velocities, large pipe diameters and shallow pipeline inclinations.

APA, Harvard, Vancouver, ISO, and other styles

7

Liang, Shibin. "Oscillating Characteristics of Slug Flow in Oscillating Heat Pipes." In 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2006. http://dx.doi.org/10.2514/6.2006-3416.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Hu, J. S., and Christopher Y. H. Chao. "Fluid Flow and Heat Transfer Characteristics of Slug Bubbly Flow in Micro Condensers." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21102.

Full text

Abstract:

Experiments were carried out to study the condensation flow pattern in silicon micro condenser using water as medium. Five flow patterns were identified under our experimental conditions. Slug-bubbly flow and droplet/liquid slug flow were found to be the two dominant flows in the micro condenser. These two flow patterns subsequently determined the heat transfer and pressure drop properties of the fluid. It was observed that only slug-bubbly flow existed in low steam mass flow and high heat flux conditions. When the steam mass flow rate increased or the heat flux dropped, mixed flow pattern occurred. An empirical correlation was obtained to predict when the transition of the flow pattern from slug-bubbly flow to mixed flow could appear. In the slug-bubbly flow regime, heat transfer coefficient and pressure drop in the micro condensers were studied. It was found that micro condensers with smaller channels could exhibit higher heat transfer coefficient and pressure drop. At constant heat flux, increasing the steam mass flow rate resulted in a higher heat transfer coefficient and also the pressure drop.

APA, Harvard, Vancouver, ISO, and other styles

9

Mehdizadeh, A., S. A. Sherif, and W. E. Lear. "Numerical Simulation of Thermofluid Characteristics of Two-Phase Slug Flow in Microchannels." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-23282.

Full text

Abstract:

A fundamental study of heat transfer characteristics of two-phase slug flow in microchannels is carried out employing the Volume-of-Fluid (VOF) method. Despite of the fact that numerical simulations of two-phase flows in microchannels have been attempted by many investigators, most efforts seem to have failed in correctly capturing the flow physics, especially those pertaining to the slug flow regime characteristics. The presence of a thin liquid film in the order of 10 μm around the bubble is a contributing factor to the above difficulty. Typically, liquid films have a significant effect on the flow field and heat transfer characteristics. In the simulations reported in this paper, the film is successfully captured and a very high local convective heat transfer coefficient is observed in the film region. A strong coupling between the conductive heat transfer in the solid wall and the convective heat transfer in the flow field is observed and characterized. Results showed that unsteady heat transfer through the solid wall in the axial direction is comparable to that in the radial direction. Results also showed that a fully developed condition could be achieved fairly quickly compared to single-phase flows. The fully developed condition is defined based on the Peclet number (Pe) and a dimensionless length of the liquid slug. Local and time-averaged Nusselt numbers for slug flows are reported for the first time. It was found that significant improvements in the heat transfer coefficient could be achieved by short slugs where the Nu number was found to be 610% higher than in single-phase flows. The study revealed new findings related to slug flow heat transfer in microchannels with constant wall heat flux.

APA, Harvard, Vancouver, ISO, and other styles

10

Wang, Yang, Changqi Yan, Licheng Sun, Dianchuan Xing, Chaoxing Yan, and Daogui Tian. "Characteristics of slug flow in narrow rectangular channels under vertical condition." In 7TH INTERNATIONAL SYMPOSIUM ON MULTIPHASE FLOW, HEAT MASS TRANSFER AND ENERGY CONVERSION. AIP, 2013. http://dx.doi.org/10.1063/1.4816858.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Characteristics of Slug Flow"

1

Shrouf, Roger D. Pressure and flow characteristics of restrictive flow orifice devices. Office of Scientific and Technical Information (OSTI), June 2003. http://dx.doi.org/10.2172/915192.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Jessop, A. M. Heat Flow [Chapter 5: Geophysical Characteristics]. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/133976.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Duignan, M. R., and C. P. May. Final data report: Plenum-Nozzle Flow Characteristics Experiment. Office of Scientific and Technical Information (OSTI), September 1993. http://dx.doi.org/10.2172/10107051.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Whitelaw, J. H. Flow and Turbulence Characteristics of Separated Flows with Active Control. Fort Belvoir, VA: Defense Technical Information Center, May 1998. http://dx.doi.org/10.21236/ada348989.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Ljungqvist, Alexander, and Matthew Richardson. The cash flow, return and risk characteristics of private equity. Cambridge, MA: National Bureau of Economic Research, January 2003. http://dx.doi.org/10.3386/w9454.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Anderson, J. L. Countercurrent flow-limiting characteristics of a Savannah River Plant control rod septifoil. Office of Scientific and Technical Information (OSTI), July 1992. http://dx.doi.org/10.2172/7041667.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Anderson, J. L. Countercurrent flow-limiting characteristics of a Savannah River Plant control rod septifoil. Office of Scientific and Technical Information (OSTI), July 1992. http://dx.doi.org/10.2172/10171322.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Spane, F. A. Jr, and R. G. Raymond. Preliminary potentiometric map and flow dynamic characteristics for the upper-basalt confined aquifer system. Office of Scientific and Technical Information (OSTI), September 1993. http://dx.doi.org/10.2172/10103183.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Sakaguchi, T., S. Hosokawa, and Y. Fujii. Flooding characteristics of gas-liquid two-phase flow in a horizontal U bend pipe. Office of Scientific and Technical Information (OSTI), September 1995. http://dx.doi.org/10.2172/107025.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Wang, W. X., T. S. Hahm, S. Ethier, G. Rewoldt, W. M. Tang, W. W. Lee, and P. H. Diamond. Characteristics of Turbulence-driven Plasma Flow and Origin of Experimental Empirical Scalings of Intrinsic Rotation. Office of Scientific and Technical Information (OSTI), March 2011. http://dx.doi.org/10.2172/1010968.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!