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Journal articles on the topic 'Phase flow'

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Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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1

Aghaee, Mohammad, Rouhollah Ganjiazad, Ramin Roshandel, and Mohammad Ali Ashjari. "Two-phase flow separation in axial free vortex flow." Journal of Computational Multiphase Flows 9, no. 3 (July 24, 2017): 105–13. http://dx.doi.org/10.1177/1757482x17699411.

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Multi-phase flows, particularly two-phase flows, are widely used in the industries, hence in order to predict flow regime, pressure drop, heat transfer, and phase change, two-phase flows should be studied more precisely. In the petroleum industry, separation of phases such as water from petroleum is done using rotational flow and vortices; thus, the evolution of the vortex in two-phase flow should be considered. One method of separation requires the flow to enter a long tube in a free vortex. Investigating this requires sufficient knowledge of free vortex flow in a tube. The present study examined the evolution of tube-constrained two-phase free vortex using computational fluid dynamics. The discretized equations were solved using the SIMPLE method. It was determined that as the liquid flows down the length of the pipe, the free vortex evolves into combined forced and free vortices. The tangential velocity of the free and forced vortices also decreases in response to viscosity. It is shown that the concentration of the second discrete phase (oil) is greatest at the center of the pipe in the core of the vortex. This concentration is at a maximum at the outlet of the pipe.

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2

Ode, Kosuke, Toshihiro Ohmae, Kenji Yoshida, and Isao Kataoka. "STUDY OF FLOW STRUCTURE IN THE AERATION TANK INDUCED BY TWO PHASE JET FLOW(Multiphase Flow)." Proceedings of the International Conference on Jets, Wakes and Separated Flows (ICJWSF) 2005 (2005): 229–34. http://dx.doi.org/10.1299/jsmeicjwsf.2005.229.

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3

HARAGUCHI, Naoki, and Hiroyasu OHTAKE. "ICONE19-43620 Study on Pressure Loss of Liquid Single-Phase Flow and Two Phase Flow in Micro- and Mini-Channels." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2011.19 (2011): _ICONE1943. http://dx.doi.org/10.1299/jsmeicone.2011.19._icone1943_250.

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4

Voutsinas, Alexandros, Toshihiko Shakouchi, Junichi Takamura, Koichi Tsujimoto, and Toshitake Ando. "FLOW AND CONTROL OF VERTICAL UPWARD GAS-LIQUID TWO-PHASE FLOW THROUGH SUDDEN CONTRACTION PIPE(Multiphase Flow 2)." Proceedings of the International Conference on Jets, Wakes and Separated Flows (ICJWSF) 2005 (2005): 307–12. http://dx.doi.org/10.1299/jsmeicjwsf.2005.307.

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5

Turza, J., Z. Tkáč, and M. Gullerová. "Geometric displacement volume and flow in the phase of a two-phase hydraulic converter." Research in Agricultural Engineering 53, No. 2 (January 7, 2008): 54–66. http://dx.doi.org/10.17221/2122-rae.

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The paper researches the possibilities to replace the parallel flow hydraulic mechanisms in agricultural machinery with hydraulic units with fluid alternating flow as they provide more efficient operation due to their output alternating motion. The method being presented analyses how the geometric displacement volume in the fluid alternating piston converter is created. This is basically achieved by adding or omitting elements in the phase which consequently reduces the quantity of converter types being manufactured.

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6

Naung, Khine Tun, Hayato TAJIMA, and Hideaki MONJI. "315 Analytical Study on Supersonic Two-Phase Flow Nozzle." Proceedings of Ibaraki District Conference 2012.20 (2012): 85–86. http://dx.doi.org/10.1299/jsmeibaraki.2012.20.85.

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7

UEMATSU, Junichi, Kazuya ABE, Tatsuya HAZUKU, Tomoji TAKAMASA, and Takashi HIBIKI. "ICONE15-10315 EFFECT OF WALL WETTABILITY ON FLOW CHARACTERISTICS OF GAS-LIQUID TWO-PHASE FLOW." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2007.15 (2007): _ICONE1510. http://dx.doi.org/10.1299/jsmeicone.2007.15._icone1510_159.

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8

Sassi, Paolo, Youssef Stiriba, Julia Lobera, Virginia Palero, and Jordi Pallarès. "Experimental Analysis of Gas–Liquid–Solid Three-Phase Flows in Horizontal Pipelines." Flow, Turbulence and Combustion 105, no. 4 (May 9, 2020): 1035–54. http://dx.doi.org/10.1007/s10494-020-00141-1.

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AbstractThe dynamics of three-phase flows involves phenomena of high complexity whose characterization is of great interest for different sectors of the worldwide industry. In order to move forward in the fundamental knowledge of the behavior of three-phase flows, new experimental data has been obtained in a facility specially designed for flow visualization and for measuring key parameters. These are (1) the flow regime, (2) the superficial velocities or rates of the individual phases; and (3) the frictional pressure loss. Flow visualization and pressure measurements are performed for two and three-phase flows in horizontal 30 mm inner diameter and 4.5 m long transparent acrylic pipes. A total of 134 flow conditions are analyzed and presented, including plug and slug flows in air–water two-phase flows and air–water-polypropylene (pellets) three-phase flows. For two-phase flows the transition from plug to slug flow agrees with the flow regime maps available in the literature. However, for three phase flows, a progressive displacement towards higher gas superficial velocities is found as the solid concentration is increased. The performance of a modified Lockhart–Martinelli correlation is tested for predicting frictional pressure gradient of three-phase flows with solid particles less dense than the liquid.

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9

Meziou, Amine, Zurwa Khan, Taoufik Wassar, Matthew A. Franchek, Reza Tafreshi, and Karolos Grigoriadis. "Dynamic Modeling of Two-Phase Gas/Liquid Flow in Pipelines." SPE Journal 24, no. 05 (April 22, 2019): 2239–63. http://dx.doi.org/10.2118/194213-pa.

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Summary Presented is a reduced–order thermal fluid dynamic model for gas/liquid two–phase flow in pipelines. Specifically, a two–phase–flow thermal model is coupled with a two–phase–flow hydraulics model to estimate the gas and liquid properties at each pressure and temperature condition. The proposed thermal model estimates the heat–transfer coefficient for different flow patterns observed in two–phase flow. For distributed flows, where the two phases are well–mixed, a weight–based averaging is used to estimate the equivalent fluid thermal properties and the overall heat–transfer coefficient. Conversely, for segregated flows, where the two phases are separated by a distinct interface, the overall heat–transfer coefficient is dependent on the liquid holdup and pressure drop estimated by the fluid model. Intermittent flows are considered as a combination of distributed and segregated flow. The integrated model is developed by dividing the pipeline into segments. Equivalent fluid properties are identified for each segment to schedule the coefficients of a modal approximation of the transient single–phase–flow pipeline–distributed–parameter model to obtain dynamic pressure and flow rate, which are used to estimate the transient temperature response. The resulting model enables a computationally efficient estimation of the pipeline–mixture pressure, temperature, two–phase–flow pattern, and liquid holdup. Such a model has utility for flow–assurance studies and real–time flow–condition monitoring. A sensitivity analysis is presented to estimate the effect of model parameters on the pipeline–mixture dynamic response. The model predictions of mixture pressure and temperature are compared with an experimental data set and OLGA (2014) simulations to assess model accuracy.

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10

Rao, Bharath, Friederich Kupzog, and Martin Kozek. "Three-Phase Unbalanced Optimal Power Flow Using Holomorphic Embedding Load Flow Method." Sustainability 11, no. 6 (March 24, 2019): 1774. http://dx.doi.org/10.3390/su11061774.

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Distribution networks are typically unbalanced due to loads being unevenly distributed over the three phases and untransposed lines. Additionally, unbalance is further increased with high penetration of single-phased distributed generators. Load and optimal power flows, when applied to distribution networks, use models developed for transmission grids with limited modification. The performance of optimal power flow depends on external factors such as ambient temperature and irradiation, since they have strong influence on loads and distributed energy resources such as photo voltaic systems. To help mitigate the issues mentioned above, the authors present a novel class of optimal power flow algorithm which is applied to low-voltage distribution networks. It involves the use of a novel three-phase unbalanced holomorphic embedding load flow method in conjunction with a non-convex optimization method to obtain the optimal set-points based on a suitable objective function. This novel three-phase load flow method is benchmarked against the well-known power factory Newton-Raphson algorithm for various test networks. Mann-Whitney U test is performed for the voltage magnitude data generated by both methods and null hypothesis is accepted. A use case involving a real network in Austria and a method to generate optimal schedules for various controllable buses is provided.

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11

Deng, Yongbo, Zhenyu Liu, and Yihui Wu. "Topology Optimization of Capillary, Two-Phase Flow Problems." Communications in Computational Physics 22, no. 5 (October 31, 2017): 1413–38. http://dx.doi.org/10.4208/cicp.oa-2017-0003.

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AbstractThis paper presents topology optimization of capillary, the typical two-phase flow with immiscible fluids, where the level set method and diffuse-interface model are combined to implement the proposed method. The two-phase flow is described by the diffuse-interface model with essential no slip condition imposed on the wall, where the singularity at the contact line is regularized by the molecular diffusion at the interface between two immiscible fluids. The level set method is utilized to express the fluid and solid phases in the flows and the wall energy at the implicit fluid-solid interface. Based on the variational procedure for the total free energy of two-phase flow, the Cahn-Hilliard equations for the diffuse-interface model are modified for the two-phase flow with implicit boundary expressed by the level set method. Then the topology optimization problem for the two-phase flow is constructed for the cost functional with general formulation. The sensitivity analysis is implemented by using the continuous adjoint method. The level set function is evolved by solving the Hamilton-Jacobian equation, and numerical test is carried out for capillary to demonstrate the robustness of the proposed topology optimization method. It is straightforward to extend this proposed method into the other two-phase flows with two immiscible fluids.

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12

Chang, J. S., P. C. Looy, and G. D. Harvel. "ICONE15-10675 EFFECT OF INLET TWO-PHASE FLOW PATTERN ON THE ANNULAR FLOW LIQUID SEPARATION PHENOMENA." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2007.15 (2007): _ICONE1510. http://dx.doi.org/10.1299/jsmeicone.2007.15._icone1510_364.

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13

Cueto-Felgueroso, Luis, and Ruben Juanes. "A phase-field model of two-phase Hele-Shaw flow." Journal of Fluid Mechanics 758 (October 9, 2014): 522–52. http://dx.doi.org/10.1017/jfm.2014.512.

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AbstractWe propose a continuum model of two-phase flow in a Hele-Shaw cell. The model describes the multiphase three-dimensional flow in the cell gap using gap-averaged quantities such as fluid saturation and Darcy flux. Viscous and capillary coupling between the fluids in the gap leads to a nonlinear fractional flow function. Capillarity and wetting phenomena are modelled within a phase-field framework, designing a heuristic free energy functional that induces phase segregation at equilibrium. We test the model through the simulation of bubbles and viscously unstable displacements (viscous fingering). We analyse the model’s rich behaviour as a function of capillary number, viscosity contrast and cell geometry. Including the effect of wetting films on the two-phase flow dynamics opens the door to exploring, with a simple two-dimensional model, the impact of wetting and flow rate on the performance of microfluidic devices and geological flows through fractures.

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14

Guo, S., P. Xu, Z. Zheng, and Y. Gao. "Estimation of flow velocity for a debris flow via the two-phase fluid model." Nonlinear Processes in Geophysics 22, no. 1 (February 3, 2015): 109–16. http://dx.doi.org/10.5194/npg-22-109-2015.

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Abstract. The two-phase fluid model is applied in this study to calculate the steady velocity of a debris flow along a channel bed. By using the momentum equations of the solid and liquid phases in the debris flow together with an empirical formula to describe the interaction between two phases, the steady velocities of the solid and liquid phases are obtained theoretically. The comparison of those velocities obtained by the proposed method with the observed velocities of two real-world debris flows shows that the proposed method can estimate the velocity for a debris flow.

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15

Guo, S., P. Xu, Z. Zheng, and Y. Gao. "Estimation of flow velocity for a debris flow via the two-phase fluid model." Nonlinear Processes in Geophysics Discussions 1, no. 1 (June 19, 2014): 999–1021. http://dx.doi.org/10.5194/npgd-1-999-2014.

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Abstract. The two-phase fluid model is applied in this study to calculate the steady velocity of a debris flow along a channel bed. By using the momentum equations of the solid and liquid phases in the debris flow together with an empirical formula to describe the interaction between two phases, the steady velocities of the solid and liquid phases are obtained theoretically. The comparison of those velocities obtained by the proposed method with the observed velocities of two real-world debris flows shows that the proposed method can estimate accurately the velocity for a debris flow.

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16

TEZUKA, Akira, and Junichi Matsumoto. "Two-phase Flow Business?" Proceedings of the Fluids engineering conference 2005 (2005): 354. http://dx.doi.org/10.1299/jsmefed.2005.354.

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17

NIIMI, Hideyuki. "Multi-Phase Flow Model of Blood Flow." JAPANESE JOURNAL OF MULTIPHASE FLOW 1, no. 1 (1987): 6–17. http://dx.doi.org/10.3811/jjmf.1.6.

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18

Frankum, D. P., V. V. Wadekar, and B. J. Azzopardi. "Two-phase flow patterns for evaporating flow." Experimental Thermal and Fluid Science 15, no. 3 (October 1997): 183–92. http://dx.doi.org/10.1016/s0894-1777(97)00020-4.

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19

Oddie, Gary, and J. R. Anthony Pearson. "FLOW-RATE MEASUREMENT IN TWO-PHASE FLOW." Annual Review of Fluid Mechanics 36, no. 1 (January 2004): 149–72. http://dx.doi.org/10.1146/annurev.fluid.36.050802.121935.

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20

Seeger, M. "Coriolis flow measurement in two phase flow." Computing and Control Engineering 16, no. 3 (June 1, 2005): 10–16. http://dx.doi.org/10.1049/cce:20050301.

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21

Chen, S. S. "Flow-Induced Vibrations in Two-Phase Flow." Journal of Pressure Vessel Technology 113, no. 2 (May 1, 1991): 234–41. http://dx.doi.org/10.1115/1.2928751.

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Two-phase flow exists in many shell-and-tube heat exchangers and power generation components. The flowing fluid is a source of energy that can induce small-amplitude subcritical oscillations and large-amplitude dynamic instabilities. In fact, many practical system components have experienced excessive flow-induced vibrations. This paper reviews the current understanding of vibration of circular cylinders in quiescent fluid, cross-flow, and axial flow, with emphasis on excitation mechanisms, mathematical models, and available experimental data. A unified theory is presented for cylinders oscillating under different flow conditions.

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22

McQuillan, K. W., and P. B. Whalley. "Flow patterns in vertical two-phase flow." International Journal of Multiphase Flow 11, no. 2 (March 1985): 161–75. http://dx.doi.org/10.1016/0301-9322(85)90043-6.

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23

Borowsky, Joseph, and Timothy Wei. "Kinematic and Dynamic Parameters of a Liquid-Solid Pipe Flow Using DPIV∕Accelerometry." Journal of Fluids Engineering 129, no. 11 (June 13, 2007): 1415–21. http://dx.doi.org/10.1115/1.2786537.

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An experimental investigation of a two-phase pipe flow was undertaken to study kinematic and dynamic parameters of the fluid and solid phases. To accomplish this, a two-color digital particle image velocimetry and accelerometry (DPIV∕DPIA) methodology was used to measure velocity and acceleration fields of the fluid phase and solid phase simultaneously. The simultaneous, two-color DPIV∕DPIA measurements provided information on the changing characteristics of two-phase flow kinematic and dynamic quantities. Analysis of kinematic terms indicated that turbulence was suppressed due to the presence of the solid phase. Dynamic considerations focused on the second and third central moments of temporal acceleration for both phases. For the condition studied, the distribution across the tube of the second central moment of acceleration indicated a higher value for the solid phase than the fluid phase; both phases had increased values near the wall. The third central moment statistic of acceleration showed a variation between the two phases with the fluid phase having an oscillatory-type profile across the tube and the solid phase having a fairly flat profile. The differences in second and third central moment profiles between the two phases are attributed to the inertia of each particle type and its response to turbulence structures. Analysis of acceleration statistics provides another approach to characterize flow fields and gives some insight into the flow structures, even for steady flows.

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24

Julia, J. Enrique, Jae-Jun Jeong, Abhinav Dixit, Basar Ozar, Takashi Hibiki, and Mamoru Ishii. "ICONE15-10338 FLOW REGIME IDENTIFICATION AND ANALYSIS IN ADIABATIC UPWARD TWO-PHASE FLOW IN AN ANNULUS GEOMETRY." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2007.15 (2007): _ICONE1510. http://dx.doi.org/10.1299/jsmeicone.2007.15._icone1510_171.

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25

OSAKABE, Masahiro, Fumitaka KAWAZOE, and Sachiyo HORIKI. "B305 ESTIMATION of TWO-PHASE FLOW QUALITY by DETECTING the ACCELERATION FLUCTUATION of PIPE(Multiphase Flow-2)." Proceedings of the International Conference on Power Engineering (ICOPE) 2009.3 (2009): _3–85_—_3–90_. http://dx.doi.org/10.1299/jsmeicope.2009.3._3-85_.

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26

ZEIDAN, D., A. SLAOUTI, E. ROMENSKI, and E. F. TORO. "NUMERICAL SOLUTION FOR HYPERBOLIC CONSERVATIVE TWO-PHASE FLOW EQUATIONS." International Journal of Computational Methods 04, no. 02 (June 2007): 299–333. http://dx.doi.org/10.1142/s0219876207000984.

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We outline an approximate solution for the numerical simulation of two-phase fluid flows with a relative velocity between the two phases. A unified two-phase flow model is proposed for the description of the gas–liquid processes which leads to a system of hyperbolic differential equations in a conservative form. A numerical algorithm based on a splitting approach for the numerical solution of the model is proposed. The associated Riemann problem is solved numerically using Godunov methods of centered-type. Results show the importance of the Riemann problem and of centered schemes in the solution of the two-phase flow problems. In particular, it is demonstrated that the Slope Limiter Centered (SLIC) scheme gives a low numerical dissipation at the contact discontinuities, which makes it suitable for simulations of practical two-phase flow processes.

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27

Warner, D. O., R. E. Hyatt, and K. Rehder. "Inhomogeneity during deflation of excised canine lungs. III. Single-breath O2 tests." Journal of Applied Physiology 65, no. 4 (October 1, 1988): 1775–81. http://dx.doi.org/10.1152/jappl.1988.65.4.1775.

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Both interregional and intraregional mechanisms may cause changes in N2 concentration of expired gas during the phases of the single-breath O2 test (SBO2) that follow dead-space washout. To evaluate the possible importance of each mechanism, we performed the SBO2 in excised canine lungs that were first suspended in air and then immersed in stable foams that simulated the vertical gradient of pleural pressure. The lungs were deflated at constant submaximal flows. The slope of phase III diminished with increasing expiratory flow and increased with foam immersion. The onset of phase IV depended on flow, and a terminal decrease in N2 concentration (phase V) was often observed. Simultaneously measured estimates of regional flows and volumes (J. Appl. Physiol. 65: 1764-1774, 1988) were used to further interpret these results. The onset of phase IV at flows greater than quasi-static signified the onset of flow limitation of dependent regions. The onset of phase V corresponded to flow limitation of nondependent regions.

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28

Ishigaki, Masahiro, Tadashi Watanabe, and Hideo Nakamura. "ICONE19-43830 Numerical Simulation of Two-phase Critical Flow with the Phase Change in the Nozzle Tube." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2011.19 (2011): _ICONE1943. http://dx.doi.org/10.1299/jsmeicone.2011.19._icone1943_319.

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29

He, S., W. Liu, C. Ouyang, and X. Li. "A two-phase model for numerical simulation of debris flows." Natural Hazards and Earth System Sciences Discussions 2, no. 3 (March 25, 2014): 2151–83. http://dx.doi.org/10.5194/nhessd-2-2151-2014.

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Abstract. Debris flows are multiphase, gravity-driven flows consisting of randomly dispersed interacting phases. The interaction between the solid phase and liquid phase plays a significant role on debris flow motion. This paper presents a new two-phase debris flow model based on the shallow water assumption and depth-average integration. The model employs the Mohr–Coulomb plasticity for the solid stress, and the fluid stress is modeled as a Newtonian viscous stress. The interfacial momentum transfer includes viscous drag, buoyancy and interaction force between solid phase and fluid phase. We solve numerically the one-dimensional model equations by a high-resolution finite volume scheme based on a Roe-type Riemann solver. The model and the numerical method are validated by using one-dimensional dam-break problem. The influences of volume fraction on the motion of debris flow are discussed and comparison between the present model and Pitman's model is presented. Results of numerical experiments demonstrate that viscous stress of fluid phase has significant effect in the process of movement of debris flow and volume fraction of solid phase significantly affects the debris flow dynamics.

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30

Kichatov, B. V., and I. V. Boyko. "Two-Phase Flow with Phase Transitions Instability." Heat Transfer Research 28, no. 4-6 (1997): 273–76. http://dx.doi.org/10.1615/heattransres.v28.i4-6.80.

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31

PROSPERETTI, A., and D. Z. ZHANG. "DISPERSE PHASE STRESS IN TWO-PHASE FLOW." Chemical Engineering Communications 141-142, no. 1 (January 1996): 387–98. http://dx.doi.org/10.1080/00986449608936425.

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32

Markovic, Maja. "Three-phase load flow." Zbornik radova, Elektrotehnicki institut Nikola Tesla, no. 21 (2011): 293–303. http://dx.doi.org/10.5937/zreint1121293m.

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33

Hayoz, Daniel, Luciano Bernardi, Georg Noll, Roger Weber, Claude-A. Porret, Claudio Passino, René Wenzel, and Nikos Stergiopulos. "Flow-Diameter Phase Shift." Hypertension 26, no. 1 (July 1995): 20–25. http://dx.doi.org/10.1161/01.hyp.26.1.20.

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34

Spedding, P. L., G. S. Woods, R. S. Raghunathan, and J. K. Watterson. "Vertical Two-Phase Flow." Chemical Engineering Research and Design 76, no. 5 (July 1998): 620–27. http://dx.doi.org/10.1205/026387698525144.

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35

Spedding, P. L., G. S. Woods, R. S. Raghunathan, and J. K. Watterson. "Vertical Two-Phase Flow." Chemical Engineering Research and Design 76, no. 5 (July 1998): 628–34. http://dx.doi.org/10.1205/026387698525153.

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36

Spedding, P. L., G. S. Woods, R. S. Raghunathan, and J. K. Watterson. "Vertical Two-Phase Flow." Chemical Engineering Research and Design 76, no. 5 (July 1998): 612–19. http://dx.doi.org/10.1205/026387698525298.

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37

Brand, B., R. Emmerling, Ch Fischer, H. P. Gaul, and K. Umminger. "Two-phase flow instrumentation." Nuclear Engineering and Design 145, no. 1-2 (November 1993): 113–30. http://dx.doi.org/10.1016/0029-5493(93)90062-e.

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38

Ying, Lexing, and Emmanuel J. Candès. "The phase flow method." Journal of Computational Physics 220, no. 1 (December 2006): 184–215. http://dx.doi.org/10.1016/j.jcp.2006.05.008.

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39

Elias, E., and G. S. Lellouche. "Two-phase critical flow." International Journal of Multiphase Flow 20 (August 1994): 91–168. http://dx.doi.org/10.1016/0301-9322(94)90071-x.

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40

Woods, G. S., P. L. Spedding, J. K. Watterson, and R. S. Raghunathan. "Vertical Two Phase Flow." Developments in Chemical Engineering and Mineral Processing 7, no. 1-2 (May 15, 2008): 7–16. http://dx.doi.org/10.1002/apj.5500070103.

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41

Oranje, L. "Terminal Slugcatchers for Two-Phase Flow and Dense-Phase Flow Gas Pipelines." Journal of Energy Resources Technology 110, no. 4 (December 1, 1988): 224–29. http://dx.doi.org/10.1115/1.3231386.

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Slugcatchers are installed at the end of two-phase pipelines and dense-phase pipelines. The technical specifications of a slugcatcher for a two-phase pipeline are based on the gas-liquid flow behavior at the various operating conditions. For a dense-phase pipeline these specifications are derived from the flow behavior in the pipeline during depressurization. These flow studies, which are carried out in the design stage of a transmission system, should be sufficiently accurate to provide proper sizing of the transmission line and slugcatcher. The paper deals with: • the methods and the quality of these methods for calculating the flow behavior in a two-phase pipeline and in a dense-phase pipeline—a comparison of both types of transmission systems is given; • the basic design of a terminal slugcatcher, including some causes of possible malfunctioning—an optimal design of a terminal slugcatcher is also discussed.

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42

Flores, A. "Gas-phase secondary flow in horizontal, stratified and annular two-phase flow." International Journal of Multiphase Flow 22 (December 1996): 121. http://dx.doi.org/10.1016/s0301-9322(97)88361-9.

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43

Flores, A. G., K. E. Crowe, and P. Griffith. "Gas-phase secondary flow in horizontal, stratified and annular two-phase flow." International Journal of Multiphase Flow 21, no. 2 (April 1995): 207–21. http://dx.doi.org/10.1016/0301-9322(94)00072-r.

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44

Chernykh, A. A., A. I. Sharapov, A. G. Arzamastsev, and Y. V. Shatskikh. "Investigation of water-air flows in nozzles." Journal of Physics: Conference Series 2088, no. 1 (November 1, 2021): 012006. http://dx.doi.org/10.1088/1742-6596/2088/1/012006.

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Abstract The undoubted importance of these problems allows us to conclude that the research aimed at creating and using a simple model of the flow of a two-phase medium is relevant and of interest not only from a scientific, but also from a practical point of view. Two approaches to their description can be distinguished: the study of flows of two-phase media taking into account relaxation processes between phases with a microscopic description of the interaction between phases, or the study of flows of two-phase media with a macroscopic description of the medium in the form of a one-speed one-temperature continuum. However, sometimes, when calculating, it is possible to ignore the structural two-phase medium and consider the medium as a one-speed one-temperature continuum. This proposal allows us to calculate the averaged flow parameters of a two-phase medium, which is required for engineering calculations. In this paper, the calculation of the flow of the gas-drop flow in the Laval nozzle is given. The method is described, which is based on integral energy equations for two-phase dispersed currents. In the calculations, the two-phase flow is considered as a single-speed, single-temperature continuum. When modeling in the ANSYS Fluent software package, a package of Euler equations is used to compare with analytical results obtained from integral energy equations.

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Ebner, Lothar, and Marie Fialová. "On Instabilities in Horizontal Two-Phase Flow." Collection of Czechoslovak Chemical Communications 59, no. 12 (1994): 2595–603. http://dx.doi.org/10.1135/cccc19942595.

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Two regions of instabilities in horizontal two-phase flow were detected. The first was found in the transition from slug to annular flow, the second between stratified and slug flow. The existence of oscillations between the slug and annular flows can explain the differences in the limitation of the slug flow in flow regime maps proposed by different authors. Coexistence of these two regimes is similar to bistable behaviour of some differential equation solutions.

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Mori, Michitsugu, Pravin Sawant, Yang Liu, and Mamoru Ishii. "ICONE19-43772 DROPLET DEPOSITION RATE IN VERTICAL ANNULAR TWO-PHASE FLOW." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2011.19 (2011): _ICONE1943. http://dx.doi.org/10.1299/jsmeicone.2011.19._icone1943_300.

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47

Vasenin, I. M. "INVESTIGATION OF TWO PHASE FLOW MOTION WITH SMALL-SIZE GAS BUBBLES." Eurasian Physical Technical Journal 16, no. 2 (December 25, 2019): 48–54. http://dx.doi.org/10.31489/2019no2/48-54.

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48

KOYAGUCHI, TAKEHIRO. "MULTIPHASE FLOWS IN MAGMATISM." International Journal of Modern Physics B 07, no. 09n10 (April 20, 1993): 1997–2023. http://dx.doi.org/10.1142/s0217979293002730.

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Diversity of volcanic activities reflects various styles of magma flows. One of the most important characters of the magma flows is that they are composed of gas, liquid and solid phases (multiphase flow). Macroscopic behaviours of multiphase flows are affected by their internal microstructures including the distribution of each phase and the shape of the boundaries between the two phases. Magma segregation from partially molten rock occurs by porous flow being accompanied with compaction of the matrix rock, the macroscopic behaviours of which are governed by microscopic flows of the melt at grain boundaries and deformation of each crystal. The fluctuation of magma effusion at volcanic eruptions is explained by instability of gas-liquid two-phase flow, which depends on motion of each bubble and the ability of bubbles to coalesce. Complex features of pyroclastic flow result from a wide range of grain-size, and hence, variable settling velocities of volcanic fragments within the flow. Physical processes of these multiphase flows in magmatism are reviewed.

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Dobran, F. "Nonequilibrium Modeling of Two-Phase Critical Flows in Tubes." Journal of Heat Transfer 109, no. 3 (August 1, 1987): 731–38. http://dx.doi.org/10.1115/1.3248151.

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A nonequilibrium two-phase flow model is described for the analysis of critical flows in variable diameter tubes. Modeling of the two-phase flow mixture in the tube is accomplished by utilizing a one-dimensional form of conservation and balance equations of two-phase flow which account for the relative velocity and temperature differences between the phases. Closure of the governing equations was performed with the constitutive equations which account for different flow regimes, and the solution of the nonlinear set of six differential equations was accomplished by a variable step numerical procedure. Computations were carried out for a steam-water mixture with varying degrees of liquid subcooling and stagnation pressures in the vessel upstream of the tube and for different tube lengths. The numerical results are compared with the experimental data involving critical flows with variable liquid subcoolings, stagnation pressures, and tube lengths, and it is shown that the nonequilibrium model predicts well the critical flow rate, pressure distribution along the tube, and the tube exit pressure.

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50

MORIYAMA, Takashi, and Tadashi MATSUYAMA. "Mass Flow Measurement of Gravity Flow for High Temperature Dense Phase Solid Gas Two Phase Flow." Transactions of the Society of Instrument and Control Engineers 21, no. 9 (1985): 942–46. http://dx.doi.org/10.9746/sicetr1965.21.942.

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