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Journal articles on the topic 'Multiphase interactions'

Author: Grafiati

Published: 20 February 2023

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1

Berlinger, Sarah A., Samay Garg, and Adam Z. Weber. "Multicomponent, multiphase interactions in fuel-cell inks." Current Opinion in Electrochemistry 29 (October 2021): 100744. http://dx.doi.org/10.1016/j.coelec.2021.100744.

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2

Sedarsky, David, Mattias Rahm, and Mark Linne. "Visualization of acceleration in multiphase fluid interactions." Optics Letters 41, no. 7 (March 17, 2016): 1404. http://dx.doi.org/10.1364/ol.41.001404.

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3

Ismayilov, G. G. "Multiphase technologies in oil-gas production." Azerbaijan Oil Industry, no. 11 (November 15, 2020): 42–46. http://dx.doi.org/10.37474/0365-8554/2020-11-42-46.

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Emergency cases, complications, maximum energetic cost, human and material expenses, negative impact on the environment in the oil-gas production taking place in the system “ well – oil and gas collection” are predominantly associated with the multiphase and multicomponent well production. Considering the research results of recent years, we can mark that in the view of hydraulic properties of the flows and interactions of seperate phases, currently are formed multiphase technologies, on the basis of which solution of various issues and increase of efficiency of technological processes in production, collection, transportation and storage of oil and gas becomes possible. The paper reviews the perspectives of solution of few issues of oil-gas production using multiphase technologies, on the basis of which the phase interaction lies. Some problems of oil-gas production, the solution of which becomes possible with multiphase technologies are noted as well.

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4

Tuan, Wei Hsing. "Design of Multiphase Materials." Key Engineering Materials 280-283 (February 2007): 963–66. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.963.

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In the present study, several principles are introduced as the guidelines to design multi- phased materials. Each phase in the multiphase material can offer one function or property to the material. The functions contributed from the phases within the multiphase material can interact with each other. Such interactions can be tailored by suitable microstructure design. The Al2O3-ZrO2-Ni multiphase material is used to demonstrate the applications of the design principles.

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5

Halik, Azhar, Rahmatjan Imin, Mamtimin Geni, Afang Jin, and Yangyang Mou. "Numerical Modeling for Discrete Multibody Interaction and Multifeild Coupling Dynamics Using the SPH Method." Mathematical Problems in Engineering 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/205976.

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Discrete multibody interaction and contact problems and the multiphase interactions such as the sand particles airflow interactions by Aeolian sand transport in the desert are modeled by using the different kernel smoothing lengths in SPH method. Each particle defines a particular kernel smoothing length such as larger smoothing length which is used to calculate continuous homogenous body. Some special smoothing lengths are used to approximate interaction between the discrete particles or objects in contact problems and in different field coupling problem. By introducing the Single Particle Model (SPM) and the Multiparticle Model (MPM), the velocity exchanging phenomena are discussed by using different elastic modules. Some characteristics of the SPM and MPM are evaluated. The results show that the new SPH method can effectively solve different discrete multibody correct contact and multiphase mutual interference problems. Finally, the new SPH numerical computation and simulation process are verified.

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6

Huang, Pengyu, Luming Shen, Yixiang Gan, Giang D. Nguyen, Abbas El-Zein, and Federico Maggi. "Coarse-grained modeling of multiphase interactions at microscale." Journal of Chemical Physics 149, no. 12 (September 28, 2018): 124505. http://dx.doi.org/10.1063/1.5038903.

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7

LUO, K. H., J. XIA, and E. MONACO. "MULTISCALE MODELING OF MULTIPHASE FLOW WITH COMPLEX INTERACTIONS." Journal of Multiscale Modelling 01, no. 01 (January 2009): 125–56. http://dx.doi.org/10.1142/s1756973709000074.

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This paper presents a variety of modeling and simulation methods for complex multiphase flow at microscopic, mesoscopic and macroscopic scales. Each method is discussed in terms of its scale-resolving capability and its relationship with other approaches. Examples of application are provided using a liquid–gas system, in which complex multiscale interactions exist among flow, turbulence, combustion and droplet dynamics. Large eddy simulation (LES) is employed to study the effects of a very large number of droplets on turbulent combustion in two configurations in a fixed laboratory frame. Direct numerical simulation (DNS) in a moving frame is then deployed to reveal detailed dynamic interactions between droplets and reaction zones. In both the LES and the DNS, evaporating droplets are modeled in a Lagrangian macroscopic approach, and have two-way couplings with the carrier gas phase. Finally, droplet collisions are studied using a multiple-relaxation-time lattice Boltzmann method (LBM). The LBM treats multiphase flow with real-fluid equations of state, which are stable and can cope with high density ratios. Examples of successful simulations of droplet coalescence and off-center separation are given. The paper ends with a summary of results and a discussion on hybrid multiscale approaches.

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8

Scheie, Allen, Jonas Kindervater, Shu Zhang, Hitesh J. Changlani, Gabriele Sala, Georg Ehlers, Andre Heinemann, Gregory S. Tucker, Seyed M. Koohpayeh, and Collin Broholm. "Multiphase magnetism in Yb2Ti2O7." Proceedings of the National Academy of Sciences 117, no. 44 (October 23, 2020): 27245–54. http://dx.doi.org/10.1073/pnas.2008791117.

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We use neutron scattering to show that ferromagnetism and antiferromagnetism coexist in the low T state of the pyrochlore quantum magnetYb2Ti2O7. While magnetic Bragg peaks evidence long-range static ferromagnetic order, inelastic scattering shows that short-range correlated antiferromagnetism is also present. Small-angle neutron scattering provides direct evidence for mesoscale magnetic structure that we associate with metastable antiferromagnetism. Classical Monte Carlo simulations based on exchange interactions inferred from⟨111⟩-oriented high-field spin wave measurements confirm that antiferromagnetism is metastable within the otherwise ferromagnetic ground state. The apparent lack of coherent spin wave excitations and strong sensitivity to quenched disorder characterizingYb2Ti2O7is a consequence of this multiphase magnetism.

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9

Frostad, John M., Martha C. Collins, and L. Gary Leal. "Cantilevered-Capillary Force Apparatus for Measuring Multiphase Fluid Interactions." Langmuir 29, no. 15 (April 2013): 4715–25. http://dx.doi.org/10.1021/la304115k.

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10

N. Ibragimov, Ranis, Akshin S. Bakhtiyarov, and Margaret Snell. "Experimental Mixing Parameterization Due to Multiphase Fluid � Structure Interactions." i-manager's Journal on Future Engineering and Technology 5, no. 2 (January 15, 2010): 1–8. http://dx.doi.org/10.26634/jfet.5.2.1089.

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11

Mozhdehi, Davoud, Sergio Ayala, Olivia R. Cromwell, and Zhibin Guan. "Self-Healing Multiphase Polymers via Dynamic Metal–Ligand Interactions." Journal of the American Chemical Society 136, no. 46 (November 6, 2014): 16128–31. http://dx.doi.org/10.1021/ja5097094.

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12

Ibragimov, Ranis N., Nadir Yilmaz, and Akshin S. Bakhtiyarov. "Experimental mixing parameterization due to multiphase fluid–structure interactions." Mechanics Research Communications 38, no. 3 (April 2011): 261–66. http://dx.doi.org/10.1016/j.mechrescom.2011.02.002.

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13

Cunningham, Victoria J., Emma C. Giakoumatos, Melissa Marks, Steven P. Armes, and Erica J. Wanless. "Effect of morphology on interactions between nanoparticle-stabilised air bubbles and oil droplets." Soft Matter 14, no. 17 (2018): 3246–53. http://dx.doi.org/10.1039/c7sm02280h.

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14

Ratliff, Daniel J., and Thomas J. Bridges. "Multiphase wavetrains, singular wave interactions and the emergence of the Korteweg–de Vries equation." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 472, no. 2196 (December 2016): 20160456. http://dx.doi.org/10.1098/rspa.2016.0456.

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Multiphase wavetrains are multiperiodic travelling waves with a set of distinct wavenumbers and distinct frequencies. In conservative systems, such families are associated with the conservation of wave action or other conservation law. At generic points (where the Jacobian of the wave action flux is non-degenerate), modulation of the wavetrain leads to the dispersionless multiphase conservation of wave action. The main result of this paper is that modulation of the multiphase wavetrain, when the Jacobian of the wave action flux vector is singular, morphs the vector-valued conservation law into the scalar Korteweg–de Vries (KdV) equation. The coefficients in the emergent KdV equation have a geometrical interpretation in terms of projection of the vector components of the conservation law. The theory herein is restricted to two phases to simplify presentation, with extensions to any finite dimension discussed in the concluding remarks. Two applications of the theory are presented: a coupled nonlinear Schrödinger equation and two-layer shallow-water hydrodynamics with a free surface. Both have two-phase solutions where criticality and the properties of the emergent KdV equation can be determined analytically.

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15

Li, Xing-gang, Leon Heisterüber, Lydia Achelis, and Udo Fritsching. "Multiscale descriptions of particle-droplet interactions in multiphase spray processing." International Journal of Multiphase Flow 80 (April 2016): 15–28. http://dx.doi.org/10.1016/j.ijmultiphaseflow.2015.10.013.

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16

Krimi, Abdelkader, Sofiane Khelladi, Xesús Nogueira, Michael Deligant, Riadh Ata, and Mehdi Rezoug. "Multiphase smoothed particle hydrodynamics approach for modeling soil–water interactions." Advances in Water Resources 121 (November 2018): 189–205. http://dx.doi.org/10.1016/j.advwatres.2018.08.004.

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17

Sarkar, Saurabh, S. Prasad Peri, and Bodhisattwa Chaudhuri. "Investigation of multiphase multicomponent aerosol flow dictating pMDI-spacer interactions." International Journal of Pharmaceutics 529, no. 1-2 (August 2017): 264–74. http://dx.doi.org/10.1016/j.ijpharm.2017.07.005.

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18

Paul, D. R. "Effects of polymer-polymer interactions in multiphase blends or alloys." Macromolecular Symposia 78, no. 1 (February 1994): 83–93. http://dx.doi.org/10.1002/masy.19940780109.

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19

Qiao, Cheng, Youcai Chen, and Xuelin Chen. "Numerical Simulation of the Erosion Effect Caused by the Impact of High-Velocity Landslide." Shock and Vibration 2022 (November 8, 2022): 1–16. http://dx.doi.org/10.1155/2022/2864271.

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Due to the complex composition consisting of solid particles and fluids with different physical properties, geophysical flows often show complex and diverse dynamic characteristics. For landslides with high water content, there are complex interactions between the solid and fluid phases. Therefore, it is difficult to grasp the dynamic characteristics and the disaster scale of this type of landslide, especially under complex terrain and ground conditions. The drag effect is an important aspect of the interaction between the solid and liquid phases. We optimized the enhanced drag coefficient formula to further consider the effect of high-velocity movement. By considering the volume fraction relationships between different phases, a mechanical erosion rate model is utilized for multiphase flows. Based on the r.avaflow numerical tool and the multiphase mass flow model, considering the interphase interaction characteristics of high-velocity liquefied landslides, we analyzed the influence of the obstruction of buildings and their entrainment into the landslide on the dynamic characteristics and hazard range of the Shenzhen 2015 landslide. This provides a reference for the analysis of complex geophysical disasters based on the multiphase mass flow model. Importantly, we have demonstrated the reduced mobility of the considered erosive impact event, which is in line with the physical principle.

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20

Wang, Xiaokun, Yanrui Xu, Xiaojuan Ban, Sinuo Liu, and Yuting Xu. "A Unified Multiple-Phase Fluids Framework Using Asymmetric Surface Extraction and the Modified Density Model." Symmetry 11, no. 6 (June 2, 2019): 745. http://dx.doi.org/10.3390/sym11060745.

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Multiple-phase fluids’ simulation and 3D visualization comprise an important cooperative visualization subject between fluid dynamics and computer animation. Interactions between different fluids have been widely studied in both physics and computer graphics. To further the study in both areas, cooperative research has been carried out; hence, a more authentic fluid simulation method is required. The key to a better multiphase fluid simulation result is surface extraction. Previous works usually have problems in extracting surfaces with unnatural fluctuations or detail missing. Gaps between different phases also hinder the reality of simulation. In this paper, we propose a unified surface extraction approach integrated with a modified density model for the particle-based multiphase fluid simulation. We refine the original asymmetric smoothing kernel used in the color field and address a binary tree scheme for surface extraction. Besides, we employ a multiphase fluid framework with modified density to eliminate density deviation between different fluids. With the methods mentioned above, our approach can effectively reconstruct the fluid surface for particle-based multiphase fluid simulation. It can also resolve the issue of overlaps and gaps between different fluids, which has widely existed in former methods for a long time. The experiments carried out in this paper show that our approach is able to have an ideal fluid surface condition and have good interaction effects.

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21

Abbatt, J. P. D., J. L. Thomas, K. Abrahamsson, C. Boxe, A. Granfors, A. E. Jones, M. D. King, et al. "Halogen activation via interactions with environmental ice and snow." Atmospheric Chemistry and Physics Discussions 12, no. 4 (April 5, 2012): 8677–769. http://dx.doi.org/10.5194/acpd-12-8677-2012.

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Abstract. The role of ice in the formation of chemically active halogens in the environment requires a full understanding because of its role in atmospheric chemistry, including controlling the oxidizing capacity of the atmosphere. In particular, ice and snow are important for facilitating multiphase oxidative chemistry and as media upon which marine algae live. This paper reviews the nature of environmental ice substrates that participate in halogen chemistry, describes the multiphase reactions that occur on such substrates, presents the field evidence for ice-mediated halogen activation, summarizes our best understanding of ice-halogen activation mechanisms, and describes the current state of modeling these processes at different scales. Given the rapid pace of developments in the field, this paper largely addresses advances made in the past five years, with emphasis given to the polar boundary layer. The integrative nature of this field is highlighted in the presentation of work from the molecular to the regional scale, with a focus on understanding fundamental processes. This is essential for developing realistic parameterizations and descriptions of these processes for inclusion in larger scale models that are used to determine their regional and global impacts.

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22

Liu, Chen, and Jianzhong Lin. "A Review on the Some Issues of Multiphase Flow with Self-Driven Particles." Applied Sciences 11, no. 16 (August 10, 2021): 7361. http://dx.doi.org/10.3390/app11167361.

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Multiphase flow with self-driven particles is ubiquitous and complex. Exploring the flow properties has both important academic meaning and engineering value. This review emphasizes some recent studies on multiphase flow with self-driven particles: the hydrodynamic interactions between self-propelled/self-rotary particles and passive particles; the aggregation, phase separation and sedimentation of squirmers; the influence of rheological properties on its motion; and the kinematic characteristics of axisymmetric squirmers. Finally, some open problems, challenges, and future directions are highlighted.

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23

Butsky, Iryna S., Joseph N. Burchett, Daisuke Nagai, Michael Tremmel, Thomas R. Quinn, and Jessica K. Werk. "Ultraviolet signatures of the multiphase intracluster and circumgalactic media in the romulusc simulation." Monthly Notices of the Royal Astronomical Society 490, no. 3 (October 12, 2019): 4292–306. http://dx.doi.org/10.1093/mnras/stz2859.

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ABSTRACT Quasar absorption-line studies in the ultraviolet (UV) can uniquely probe the nature of the multiphase cool–warm (104 < T < 106 K) gas in and around galaxy clusters, promising to provide unprecedented insights into (1) interactions between the circumgalactic medium (CGM) associated with infalling galaxies and the hot (T > 106 K) X-ray emitting intracluster medium (ICM), (2) the stripping of metal-rich gas from the CGM, and (3) a multiphase structure of the ICM with a wide range of temperatures and metallicities. In this work, we present results from a high-resolution simulation of an $\sim 10^{14} \, \mathrm{M}_{\odot }$ galaxy cluster to study the physical properties and observable signatures of this cool–warm gas in galaxy clusters. We show that the ICM becomes increasingly multiphased at large radii, with the cool–warm gas becoming dominant in cluster outskirts. The diffuse cool–warm gas also exhibits a wider range of metallicity than the hot X-ray emitting gas. We make predictions for the covering fractions of key absorption-line tracers, both in the ICM and in the CGM of cluster galaxies, typically observed with the Cosmic Origins Spectrograph aboard the Hubble Space Telescope (HST). We further extract synthetic spectra to demonstrate the feasibility of detecting and characterizing the thermal, kinematic, and chemical composition of the cool–warm gas using H i, O vi, and C iv lines, and we predict an enhanced population of broad Ly α absorbers tracing the warm gas. Lastly, we discuss future prospects of probing the multiphase structure of the ICM beyond HST.

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24

Padrino, Juan C., Xia Ma, W. Brian VanderHeyden, and Duan Z. Zhang. "A Separate-Phase Drag Model and a Surrogate Approximation for Simulation of the Steam-Assisted-Gravity-Drainage Process." SPE Journal 21, no. 02 (April 14, 2016): 364–79. http://dx.doi.org/10.2118/178432-pa.

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Summary General, ensemble phase-averaged equations for multiphase flows were specialized for the simulation of the steam-assisted-gravity-drainage (SAGD) process. In the average momentum equation, fluid/solid and fluid/fluid viscous interactions are represented by separate force terms. This equation has a form similar to that of Darcy's law for multiphase flow but augmented by the fluid/fluid viscous forces. Models for these fluid/fluid interactions are suggested and implemented into the numerical code CartaBlanca. Numerical results indicate that the model captures the main features of the multiphase flow in the SAGD process, but the detailed features, such as plumes, are missed. We find that viscous coupling among the fluid phases is important. Advection time scales for the different fluids differ by several orders of magnitude because of vast viscosity differences. Numerically resolving all these time scales is time consuming. To address this problem, we introduce a steam-surrogate approximation to increase the steam-advection time scale, while keeping the mass and energy fluxes well-approximated. This approximation leads to approximately a 40-fold speedup in execution speed of the numerical calculations at the cost of a few percentage errors in the relevant quantities.

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25

Zeng, Qing Hua, Wen Xu, Ai Bing Yu, and Donald R. Paul. "Quantification of the Interface Interactions in Polymer Nanocomposites." Materials Science Forum 654-656 (June 2010): 2608–11. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.2608.

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Interfaces are important for many properties and applications of multiphase materials. This is particular true for particle-reinforced polymer composites, where the interfacial characteristics between particle and polymer play a crucial role in load transfer and mechanical properties. In polymer nanocomposites, the adhesion strength between particle and polymer matrix is a major factor in determining their mechanical properties. In this work, we present our recent study towards the quantification of the interaction strength at the interface of clay-based polymer nanocomposites by molecular dynamics simulation.

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26

Mackenzie-Helnwein, P., P. Arduino, W. Shin, J. A. Moore, and G. R. Miller. "Modeling strategies for multiphase drag interactions using the material point method." International Journal for Numerical Methods in Engineering 83, no. 3 (February 1, 2010): 295–322. http://dx.doi.org/10.1002/nme.2823.

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27

LIU, M. B., J. Z. CHANG, H. T. LIU, and T. X. SU. "MODELING OF CONTACT ANGLES AND WETTING EFFECTS WITH PARTICLE METHODS." International Journal of Computational Methods 08, no. 04 (November 20, 2011): 637–51. http://dx.doi.org/10.1142/s0219876211002733.

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The physics of fluid–fluid–solid contact line dynamics and wetting behaviors are closely related to the inter-particle and intra-molecular hydrodynamic interactions of the concerned multiple phase system. Investigation of surface tension, contact angle, and wetting behavior using molecular dynamics (MD) is practical only on extremely small time scales (nanoseconds) and length scales (nanometers) even if the most advanced high-performance computers are used. In this article we introduce two particle methods, which are smoothed particle hydrodynamics (SPH) and dissipative particle dynamics (DPD), for multiphase fluid motion on continuum scale and meso-scale (between the molecular and continuum scales). In both methods, the interaction of fluid particles and solid particles can be used to study fluid–fluid–solid contact line dynamics with different wetting behaviors. The interaction strengths between fluid particles and between fluid and wall particles are closely related to the wetting behavior and the contact angles. The effectiveness of SPH and DPD in modeling contact line dynamics and wetting behavior has been demonstrated by a number of numerical examples that show the complexity of different multiphase flow behaviors.

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28

Kawana, Saki, Shintaro Nakagawa, Shuya Nakai, Minami Sakamoto, Youichi Ishii, and Naoko Yoshie. "Interphase synergistic effects of dynamic bonds in multiphase thermoplastic elastomers." Journal of Materials Chemistry A 7, no. 37 (2019): 21195–206. http://dx.doi.org/10.1039/c9ta07522d.

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29

Dayananda, Mysore A. "An Overview of Selected Phenomena in Multicomponent Diffusion." Diffusion Foundations 4 (July 2015): 3–21. http://dx.doi.org/10.4028/www.scientific.net/df.4.3.

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There exist several interesting phenomena and observations reported in literature for isothermal diffusion in multicomponent systems. Such phenomena include uphill diffusion, development of zero-flux planes and flux reversals for individual components, flux reversals at interfaces, and instability at interfaces and multiphase layer development. In addition, uncommon diffusion structures exhibiting unusual diffusion paths can develop in both single phase and multiphase diffusion assemblies. An overview of such phenomena is presented to highlight the role of interactions among diffusing components with the aid of selected diffusion studies carried out in multicomponent alloy systems, aluminides, silicides, and nuclear fuels.

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30

Milanez, M., G. F. Naterer, G. Venn, and G. Richardson. "Volume Averaged Pressure Interactions for Dispersed Droplet Phase Modeling of Multiphase Flow." AIAA Journal 42, no. 5 (May 2004): 973–79. http://dx.doi.org/10.2514/1.9590.

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31

Kolev,, NI, and RW Lyczkowski,. "Multiphase Flow Dynamics, Volume 1: Fundamentals; Volume 2: Thermal and Mechanical Interactions." Applied Mechanics Reviews 56, no. 4 (July 1, 2003): B57—B59. http://dx.doi.org/10.1115/1.1579460.

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32

Withjack, Martha Oliver, Alissa A. Henza, and Roy W. Schlische. "Three-dimensional fault geometries and interactions within experimental models of multiphase extension." AAPG Bulletin 101, no. 11 (November 2017): 1767–89. http://dx.doi.org/10.1306/02071716090.

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33

Li, Ling, Luming Shen, Giang D. Nguyen, Abbas El-Zein, and Federico Maggi. "A smoothed particle hydrodynamics framework for modelling multiphase interactions at meso-scale." Computational Mechanics 62, no. 5 (January 27, 2018): 1071–85. http://dx.doi.org/10.1007/s00466-018-1551-3.

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Wagner, Justin L., Steven J. Beresh, Sean P. Kearney, Wayne M. Trott, Jaime N. Castaneda, Brian O. Pruett, and Melvin R. Baer. "A multiphase shock tube for shock wave interactions with dense particle fields." Experiments in Fluids 52, no. 6 (February 11, 2012): 1507–17. http://dx.doi.org/10.1007/s00348-012-1272-x.

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35

Wu, Yuchao, Darshil U. Shah, Chenyan Liu, Ziyi Yu, Ji Liu, Xiaohe Ren, Matthew J. Rowland, Chris Abell, Michael H. Ramage, and Oren A. Scherman. "Bioinspired supramolecular fibers drawn from a multiphase self-assembled hydrogel." Proceedings of the National Academy of Sciences 114, no. 31 (July 10, 2017): 8163–68. http://dx.doi.org/10.1073/pnas.1705380114.

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Inspired by biological systems, we report a supramolecular polymer–colloidal hydrogel (SPCH) composed of 98 wt % water that can be readily drawn into uniform (∼6-μm thick) “supramolecular fibers” at room temperature. Functionalized polymer-grafted silica nanoparticles, a semicrystalline hydroxyethyl cellulose derivative, and cucurbit[8]uril undergo aqueous self-assembly at multiple length scales to form the SPCH facilitated by host–guest interactions at the molecular level and nanofibril formation at colloidal-length scale. The fibers exhibit a unique combination of stiffness and high damping capacity (60–70%), the latter exceeding that of even biological silks and cellulose-based viscose rayon. The remarkable damping performance of the hierarchically structured fibers is proposed to arise from the complex combination and interactions of “hard” and “soft” phases within the SPCH and its constituents. SPCH represents a class of hybrid supramolecular composites, opening a window into fiber technology through low-energy manufacturing.

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36

Uthaisangsuk, Vitoon, Ulrich Prahl, and Wolfgang Bleck. "Microstructure Based Formability Characterization of Multi Phase Steels Using Damage Mechanics." Key Engineering Materials 348-349 (September 2007): 217–20. http://dx.doi.org/10.4028/www.scientific.net/kem.348-349.217.

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Due to the coexistence of different micro structural components and their interactions, multiphase steels offer an excellent combination between high formability and strength. On the micro-scale, the fracture examination shows large influence of different phases and their distributions on the mechanical properties and failure mechanisms. Considering the influence of multiphase microstructure, an approach is presented using representative volume elements (RVE) in combination with continuum damage mechanics (CDM). Herein, the influence of the material properties of individual phases and the local states of stress on the material formability as well as the failure behavior can be examined. By means of the RVE-CDM approach, a precise criterion for the deformability characterization in sheet metal forming of multi phase steels is presented.

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Yang, Youqing, Pengtao Sun, and Zhen Chen. "Combined MPM-DEM for Simulating the Interaction Between Solid Elements and Fluid Particles." Communications in Computational Physics 21, no. 5 (March 27, 2017): 1258–81. http://dx.doi.org/10.4208/cicp.oa-2016-0050.

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AbstractHow to effectively simulate the interaction between fluid and solid elements of different sizes remains to be challenging. The discrete element method (DEM) has been used to deal with the interactions between solid elements of various shapes and sizes, while the material point method (MPM) has been developed to handle the multiphase (solid-liquid-gas) interactions involving failure evolution. A combined MPM-DEM procedure is proposed to take advantage of both methods so that the interaction between solid elements and fluid particles in a container could be better simulated. In the proposed procedure, large solid elements are discretized by the DEM, while the fluid motion is computed using the MPM. The contact forces between solid elements and rigid walls are calculated using the DEM. The interaction between solid elements and fluid particles are calculated via an interfacial scheme within the MPM framework. With a focus on the boundary condition effect, the proposed procedure is illustrated by representative examples, which demonstrates its potential for a certain type of engineering problems.

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38

Grün, Jeremias, Simon Feldmeth, and Frank Bauer. "Multiphase Computational Fluid Dynamics of Rotary Shaft Seals." Lubricants 10, no. 12 (December 3, 2022): 347. http://dx.doi.org/10.3390/lubricants10120347.

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The primary task of rotary shaft seals is to prevent an unwanted fluid transfer between two areas. In shaft passages of gearboxes, for example, rotary shaft seals avoid the leakage of transmission oil to ambient air. This means the flow in the lubricant film in the sealing gap between the sealing edge and the shaft surface consists of at least two phases. Taking the phenomenon of cavitation into account, the flow consists of three phases. This study aims to provide an in-depth understanding of the multiphase flow in the lubricant film of rotary shaft seals. As experimental studies of the flow processes on a microscale have proven to be quite difficult, a simulation-based approach is applied. Computational fluid dynamics (CFD) serves to compute the transient multiphase flows in the lubricant film in the sealing gap. The computational domain is a three-dimensional microscale model of the lubricant film. The results show the transient hydrodynamic pressure buildup and the dynamic phase interactions during operation. This study provides far-reaching insights into the multiphase flow processes in the lubricant film in the sealing gap and simulation-based evidence of the lubrication and sealing mechanism of rotary shaft seals.

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Toriu, Daisuke, and Satoru Ushijima. "Multiphase computational method for thermal interactions between compressible fluid and arbitrarily shaped solids." International Journal for Numerical Methods in Fluids 87, no. 8 (March 23, 2018): 383–400. http://dx.doi.org/10.1002/fld.4495.

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Heldmann, Alexander, Markus Hoelzel, Michael Hofmann, Weimin Gan, Wolfgang W. Schmahl, Erika Griesshaber, Thomas Hansen, Norbert Schell, and Winfried Petry. "Diffraction-based determination of single-crystal elastic constants of polycrystalline titanium alloys." Journal of Applied Crystallography 52, no. 5 (September 20, 2019): 1144–56. http://dx.doi.org/10.1107/s1600576719010720.

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Single-crystal elastic constants have been derived by lattice strain measurements using neutron diffraction on polycrystalline Ti-6Al-4V, Ti-6Al-2Sn-4Zr-6Mo and Ti-3Al-8V-6Cr-4Zr-4Mo alloy samples. A variety of model approximations for the grain-to-grain interactions, namely approaches by Voigt, Reuss, Hill, Kroener, de Wit and Matthies, including texture weightings, have been applied and compared. A load-transfer approach for multiphase alloys was also implemented and the results are compared with single-phase data. For the materials under investigation, the results for multiphase alloys agree well with the results for single-phase materials in the corresponding phases. In this respect, all eight elastic constants in the dual-phase Ti-6Al-2Sn-4Zr-6Mo alloy have been derived for the first time.

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Guo, Jing Kun, Hua Min Kou, and Yu Bai Pan. "The Thinking on Multiphase Materials." Key Engineering Materials 351 (October 2007): 233–37. http://dx.doi.org/10.4028/www.scientific.net/kem.351.233.

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The main problems for multiphase materials are the even mixing and the bonding or reacting among two or more phases, as well as the states of their grain boundaries. The mixing of two phases is usually effective by using liquid medium. The technology of second phase coating for the original particles or so call nucleo-shell structure is a well approach for the even mixing. For ceramic matrix multiphase materials low sintering temperature is the effective way to avoid the occurring of reaction between different phases. The design of grain boundary and its stress is important for their bonding states. The thinking for above problems would be described briefly in this paper. The purpose of multiphase materials design is expected that every phase will be playing its role, combining together and then given out a comprehensive performances. So it is necessary to consider the following problems. 1. Even mixing Even mixing between each other material is important for multiphase materials. It’s the better when the processing is carrying on in the liquid state for the even mixing of two phase materials. Using physical or chemical method could be formed the fine solid particles with even dispersion of two or more phases materials. Usually it could be obtained nano-scale particles. The application of nano-technology is necessary. The nano-scale mixing of two phases materials would be greatly increased the contacting surface of each other particles without agglomeration. Of course, if one phase of material is fine solid particle which disperses in another phase of material solution, the even mixing of two phases is obtained similarly. Making a coating to other phase particle is a very good approach for the two phases even mixing. Coating process is attracting more and more attention in the preparation of composite materials mainly due to its predominance in the improvement of the uniformity for different phases [1]. The thickness of coating material determines the amount proportion of two phases which is able to be control. Two examples of so-called “nucleo-shell structure” will be introduced in the following parts. Cermet composites have been widely studied due to their potential for achieving higher toughness and reasonable strength compared with ceramic matrix. But except for numbered systems, such as Co/WC and Ni/TiN, few systems have reached the people’s expectation mainly for the poor wettability between metal and ceramic. Al/Al2O3 cermet is a low density and high strength material, and it has many potential and actual applications in military, industrial and consumer regions. To improve the dispersive uniformity of the two phases, coating aluminum with alumina may be a good candidate since such coatings not only stabilize aluminum dispersions but also make it possible to control inter-particle and particle-matrix interactions [2]. Figure1a-c shows the images

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Shih, Ruey Syan. "Numerical Study of the Characteristics of Wave-Wave Interactions in Multiphase Wave Field Near Coastal Area." Advanced Materials Research 255-260 (May 2011): 2313–17. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.2313.

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Numerical investigations of multiphase irregular wave field are presented by using the BEM, which incorporates the interaction between incoming wave and reflected wave in the coastal area. This study discusses the case of multi-component wave generation using the 2D-NWT, which incorporates the wave-wave interactions between various conditions of incoming waves and high frequency reflected waves, including the variation of wave field and particle trajectory. The surf beats in the surf zone is mainly the cause of the cross-shore motion, and the generations of high frequency harmonics waves, these phenomena will be study accordingly in this preliminary study for the modeling of oscillations cause by surf beat and back swash, the generation of high frequency multi-phase reflected wave are carried out to investigate the deformation of wave profile, wave field and particle path-line.

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Su, Qian, Xiangtian Deng, Zhenxing Liu, Chao Tan, and Feng Dong. "Phase fraction measurement of oil–gas–water three-phase flow with stratified gas by ultrasound technique." Measurement Science and Technology 33, no. 7 (April 11, 2022): 075302. http://dx.doi.org/10.1088/1361-6501/ac60f6.

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Abstract Phase fraction is one of important indexes to characterize multiphase flow. In order to measure each phase fraction of oil–gas–water three-phase flow, liquid level height is detected by time-of-flight—TOF of reflected ultrasound at gas–liquid interface, while oil phase fraction in reflection path is calculated according to the ultrasound attenuation. By studying interactions between multiphase flow and the ultrasound propagation in certain flow patterns, a prediction model for phase fraction measurement of three-phase flow is proposed based on ultrasound transmission attenuation and reflection TOF in the process of horizontal flow with actual phase distributions. Simulation and experimental results under conditions of oil–water two-phase structure with stratified gas in a horizontal pipe show that the proposed method and the established model can accurately detect gas–liquid interface, so that measure oil, gas, water phase fraction. The mechanism prediction model and the measurement device effectively solve the nonlinear response of the ultrasonic measurement parameter, so that can estimate phase fractions of liquids and gas in two-phase as well as three-phase flows simultaneously, which extends the measurement range and the applicable scope of ultrasonic technique to multiphase flow.

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Guk, Sergey, Markus Preiß, and Rudolf Kawalla. "Metal Formability Interactions in Laser Marking for Creating of Grid Patterns for Forming Strain Analysis of High Strength Steels." Key Engineering Materials 746 (July 2017): 92–98. http://dx.doi.org/10.4028/www.scientific.net/kem.746.92.

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A commercially available laser marking system based on diode-pumped Nd:YVO4 laser was used for creating grid patterns for forming strain analysis of three different multiphase steels. The aim was to determine and analyze the influence of laser working parameters on the formability of the investigated sheet materials by means of an in-depth characterization of this induced microstructural and geometric inhomogeneity. The electrochemical etching served as the reference method without the negative effect of generating inhomogeneity. The formability was evaluated using the cupping test according to Erichsen. While the quantification of geometric inhomogeneity was based on the determination of the notch factor, microhardness measurement was used for the evaluation of micro-structural inhomogeneity. The results showed that multiphase steels exhibit similar values of the mark depth under the same creating parameters by means of laser. Furthermore, only the induced geometric inhomogeneity had a marked influence on the material formability. Finally, a method for the prediction of the optimal values of the grid pattern mark depth was developed from the perspective of its good visual recognizability and associated with the microstructure based material sensitivity to stress concentrators.

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PREMNATH, KANNAN N., and JOHN ABRAHAM. "LATTICE BOLTZMANN SIMULATIONS OF DROP–DROP INTERACTIONS IN TWO-PHASE FLOWS." International Journal of Modern Physics C 16, no. 01 (January 2005): 25–44. http://dx.doi.org/10.1142/s0129183105006930.

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In this paper, three-dimensional computations of drop–drop interactions using the lattice Boltzmann method (LBM) are reported. The LBM multiphase flow model employed is evaluated for single drop problems and binary drop interactions. These include the verification of Laplace–Young relation for static drops, drop oscillations, and drop deformation and breakup in simple shear flow. The results are compared with experimental data, analytical solutions and numerical solutions based on other computational methods, as applicable. Satisfactory agreement is shown. Initial studies of drop–drop interactions involving the head-on collisions of drops in quiescent medium and off-center collision of drops in the presence of ambient shear flow are considered. As expected, coalescence outcome is observed for the range of parameters studied.

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Olivelli, Melisa S., Ioana Fugariu, Rosa M. Torres Sánchez, Gustavo Curutchet, André J. Simpson, and Myrna J. Simpson. "Unraveling Mechanisms behind Biomass–Clay Interactions Using Comprehensive Multiphase Nuclear Magnetic Resonance (NMR) Spectroscopy." ACS Earth and Space Chemistry 4, no. 11 (November 2, 2020): 2061–72. http://dx.doi.org/10.1021/acsearthspacechem.0c00215.

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Shih, Ruey-Syan, and Wen-Kai Weng. "Numerical study of the characteristics of wave–wave interactions in a multiphase wave field." Engineering Analysis with Boundary Elements 51 (February 2015): 14–29. http://dx.doi.org/10.1016/j.enganabound.2014.10.009.

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Pétein, A., L. Ryelandt, Stéphane Godet, and Pascal J. Jacques. "Microscale Characterisation of Deformed Microstructures of TRIP-Assisted and Multiphase Steels." Materials Science Forum 495-497 (September 2005): 459–64. http://dx.doi.org/10.4028/www.scientific.net/msf.495-497.459.

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The improvement of the mechanical behaviour of high performance steels brings about a renewed interest for the work hardening rate resulting from deformation-induced martensitic transformation or mechanical twinning. Even if these mechanisms are known for quite a long time, the deformation – transformation interactions that they induce is not yet fully characterised and understood. This study aims at characterising the microstructure evolution of a Fe-Mn steel grade during straining thanks to TEM and high resolution OIM. Particular patterns of austenite – e and a’ martensite are found.

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Sundaresan, Sankaran, Ali Ozel, and Jari Kolehmainen. "Toward Constitutive Models for Momentum, Species, and Energy Transport in Gas–Particle Flows." Annual Review of Chemical and Biomolecular Engineering 9, no. 1 (June 7, 2018): 61–81. http://dx.doi.org/10.1146/annurev-chembioeng-060817-084025.

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As multiscale structures are inherent in multiphase flows, constitutive models employed in conjunction with transport equations for momentum, species, and energy are scale dependent. We suggest that this scale dependency can be better quantified through deep learning techniques and formulation of transport equations for additional quantities such as drift velocity and analogies for species, energy, and momentum transfer. How one should incorporate interparticle forces, which arise through van der Waals interaction, dynamic liquid bridges between wet particles, and tribocharging, in multiscale models warrants further study. Development of multiscale models that account for all the known interactions would improve confidence in the use of simulations to explore design options, decrease the number of pilot-scale experiments, and accelerate commercialization of new technologies.

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Godet, Stéphane, C. Georges, and Pascal J. Jacques. "On the Phase Transformations in Hot Rolled TRIP-Assisted Multiphase Steels." Materials Science Forum 539-543 (March 2007): 4333–38. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.4333.

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TRIP-assisted multiphase steels exhibit an excellent balance of strength and ductility, which makes them very attractive for the automotive industry. These remarkable mechanical properties can be attributed mainly to their composite-like microstructures and to the transformation of retained austenite into martensite during straining (Transformation-Induced Plasticity). The aim of this study is to highlight the interactions between the hot rolling conditions, the transformation of austenite and formation of the microstructure, and the resulting mechanical properties. Various rolling simulation techniques were employed to determine how the composite microstructure is formed during the various steps of multi-stage thermomechanical processing.

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