Academic literature on the topic 'Internal diffusion'

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 'Internal diffusion.'

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 "Internal diffusion"

1

John I. Koivula, John I. "Internal diffusion." Journal of Gemmology 20, no. 7 (1987): 474–77. http://dx.doi.org/10.15506/jog.1987.20.7.474.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Lawler, Gregory F., Maury Bramson, and David Griffeath. "Internal Diffusion Limited Aggregation." Annals of Probability 20, no. 4 (October 1992): 2117–40. http://dx.doi.org/10.1214/aop/1176989542.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Sanderson, Brian G., and Akira Okubo. "Diffusion by internal waves." Journal of Geophysical Research 93, no. C4 (1988): 3570. http://dx.doi.org/10.1029/jc093ic04p03570.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Young, David J. "Diffusion in Internal Oxidation Reactions." Defect and Diffusion Forum 323-325 (April 2012): 283–88. http://dx.doi.org/10.4028/www.scientific.net/ddf.323-325.283.

Full text
Abstract:
When an alloy component is selectively oxidised but cannot reach the surface quickly enough to form a scale, then internal oxidation results. In this process, a gas phase oxidant dissolves in an alloy and diffuses inwards, reacting with a dilute solute metal to precipitate metal oxide or carbide, etc. Penetration kinetics are parabolic, the rate being controlled by oxidant diffusion and the concentration of reacting metal. Rates are predicted from classical oxidation theory on the basis that the reaction product is exceedingly stable, no solute metal remains in the reacted alloy, and oxidant diffusion is via a solvent metal matrix. This paper is concerned with situations where these approximations fail: the development of low stability precipitates and the growth of elongated precipitates which allow interfacial diffusion of the oxidant. Effects on the rates of internal oxidation are discussed.
APA, Harvard, Vancouver, ISO, and other styles
5

Weissman, M. B. "Internal diffusion noise of fractals." Physical Review B 36, no. 10 (October 1, 1987): 5754–55. http://dx.doi.org/10.1103/physrevb.36.5754.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Ye, Min. "UTILITY AND CONDITIONS OF DIFFUSION BY DIASPORAS: EXAMINING FOREIGN DIRECT INVESTMENT LIBERALIZATION IN CHINA AND INDIA." Journal of East Asian Studies 16, no. 2 (July 2016): 261–80. http://dx.doi.org/10.1017/jea.2016.3.

Full text
Abstract:
AbstractDiffusion studies have rightly emphasized external ideas and resources that propel liberalization in the developing world. There remain two gaps: first, the literature has not covered the types of diffusers and the ways diasporas may shape liberalization in their homelands; second, it pays little attention to internal diffusion after national adoption within a country. This article explores the utility and conditions of diffusion by diasporas and examines the roles of diasporas and internal diffusion in China and India's FDI liberalization. In both countries, diasporas were main diffusers that led national adoption of liberalism at home. In China, however, entrepreneurial diasporas' networks with local governments helped expansive internal diffusion. India's professional diasporas did not strongly engage local governments or domestic companies. National adoption in India was followed by reversal and partial internal diffusions. India's software services provide a similar diffusion by diasporas to that in China.
APA, Harvard, Vancouver, ISO, and other styles
7

Schatzman, Evry. "Diffusion process produced by random internal waves." Journal of Fluid Mechanics 322 (September 10, 1996): 355–82. http://dx.doi.org/10.1017/s0022112096002820.

Full text
Abstract:
The aim of the paper is to present a new transport process which is likely to have great importance for understanding the internal constitution of the stars.In order to set the problem in context, we first give a short presentation of the physical properties of the Sun and stars, described usually under the names Standard Solar Model or Standard Stellar Models (SSM). Next we show that an important shortcoming of SSM is that they do not explain the age dependence of the lithium deficiency of stars of known age: stars of galactic clusters and the Sun. It was suggested a long time ago that the presence of a macroscopic diffusion process in the radiative zone should be assumed, below the surface convective zone of solar-like stars. It is then possible for the lithium present in the convective zone to be carried to the thermonuclear burning level below the convective zone. The first assumption was that differential rotation generates turbulence and therefore that a turbulent diffusion process takes place. However, this model predicts a lithium abundance which is strongly rotation dependent, contrary to the observations. Furthermore, as the diffusion coefficient is large all over the radiative zone, it prevents the possibility of gravitational separation by diffusion and consequently leads to the impossibility of explaining the difference in helium abundance between the surface and the centre of the Sun. The consequence is obviously that we need to take into account another physical process.Stars having a mass M < 1.3M[odot ] have a convective zone which begins close to the stellar surface and extends down to a depth which is an appreciable fraction of the stellar radius. In the convective zone, strong stochastic motions carry, at least partially, heat transfer. These motions do not vanish at the lower boundary and generate internal waves into the radiative zone. These random internal waves are at the origin of a diffusion process which can be considered as responsible for the diffusive transport of lithium down to the lithium burning level. This is certainly not the only physical process responsible for lithium deficiency in main sequence stars, but its properties open the way to a completely consistent analysis of lithium deficiency.The model of generation of gravity waves is based on a model of heat transport in the convective zone by diving plumes. The horizontal component of the turbulent motion at the boundary of the convective zone is assumed to generate the horizontal motion of internal waves. The result is a large horizontal component of the diffusion coefficient, which produces in a short time an horizontally uniform chemical composition. It is known that gravity waves, in the absence of any dissipative process, cannot generate vertical mixing. Therefore, the vertical component of the diffusion coefficient is entirely dependent on radiative damping. It decreases quickly in the radiative zone, but is large enough to be responsible for lithium burning.Owing to the radial dependence of velocity amplitude, the diffusion coefficient increases when approaching the stellar centre. However, very close to the centre, nonlinear dissipative and radiative damping of internal waves become large and the diffusion coefficient vanishes at the very centre.
APA, Harvard, Vancouver, ISO, and other styles
8

KIM, MOON-SOO, and HO KIM. "INNOVATION DIFFUSION OF TELECOMMUNICATIONS: GENERAL PATTERNS, DIFFUSION CLUSTERS AND DIFFERENCES BY TECHNOLOGICAL ATTRIBUTE." International Journal of Innovation Management 08, no. 02 (June 2004): 223–41. http://dx.doi.org/10.1142/s136391960400099x.

Full text
Abstract:
We investigated the patterns of the technological diffusions of 17 Korean information and telecommunications (IT) innovations by applying various diffusion models, where the Bass model was chosen the most robust one. Although the internal influence dominates diffusion process for most innovations, the external influence was found to be meaningful to Korean IT diffusion compared with US's. Based on estimated parameters — penetration rate, innovation and imitation coefficients, we conducted cluster analysis, which resulted in four clusters and two isolated innovations. Differences of diffusion patterns between circuit-based and packet-based technology were examined by the external and internal influence as well as the critical mass point. Based on these findings we proposed the several practical implications for ISPs providing packet-based services, Telecommunications carriers with circuit and packet-based services, as well as policy makers.
APA, Harvard, Vancouver, ISO, and other styles
9

Meakin, Paul, and Tamás Vicsek. "Internal structure of diffusion-limited aggregates." Physical Review A 32, no. 1 (July 1, 1985): 685–88. http://dx.doi.org/10.1103/physreva.32.685.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Petit, Andrew S., and Anne B. McCoy. "Diffusion Monte Carlo in Internal Coordinates." Journal of Physical Chemistry A 117, no. 32 (March 13, 2013): 7009–18. http://dx.doi.org/10.1021/jp312710u.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic "Internal diffusion"

1

Otto, Oliver, Sebastian Sturm, Nadanai Laohakunakorn, Ulrich Keyser, and Klaus Kroy. "Rapid internal contraction boosts DNA friction." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-183656.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Chung, Samwon. "The effect of internal stress on diffusion." Case Western Reserve University School of Graduate Studies / OhioLINK, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=case1058210791.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Brutzer, Hergen, Alexander Huhle, Daniel Klaue, and Ralf Seidel. "Internal friction of a migrating Holliday junction." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-183596.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Otto, Oliver, Sebastian Sturm, Nadanai Laohakunakorn, Ulrich Keyser, and Klaus Kroy. "Rapid internal contraction boosts DNA friction." Diffusion fundamentals 20 (2013) 77, S. 1, 2013. https://ul.qucosa.de/id/qucosa%3A13665.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Brutzer, Hergen, Alexander Huhle, Daniel Klaue, and Ralf Seidel. "Internal friction of a migrating Holliday junction." Diffusion fundamentals 20 (2013) 72, S. 1, 2013. https://ul.qucosa.de/id/qucosa%3A13659.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Li, Lilong, and Songhua Chen. "Incorporating internal gradient and restricted diffusion effects in Nuclear Magnetic Resonance log interpretation." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-186342.

Full text
Abstract:
It is shown that internal gradient combined with the restricted diffusion effect can significantly influence the D-T2 cross plots, which are widely used for fluid typing in Nuclear Magnetic Resonance (NMR) well-logging applications. By using models that capture the most important features of the internal gradient in the sedimentary rocks, such effects can be accounted for in the D-T2 inversion process, making fluid typing more accurate.
APA, Harvard, Vancouver, ISO, and other styles
7

Perkins, Edward William. "The spatial dynamics of internal migration : implications for the diffusion of HIV." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621237.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Lorenzo, Oswaldo J. "Development of a model of internal diffusion and infusion of enterprise systems." Thesis, University of Warwick, 2004. http://wrap.warwick.ac.uk/73548/.

Full text
Abstract:
After most large industrial companies have installed enterprise systems (ES), the managerial concern moves to the effective diffusion and infusion of ES throughout a company. Diffusion means the degree in which a system has been shared throughout the company and infusion is the degree in which a system has penetrated a company in terms of importance, impact, and significance. Little of the ES literature has considered these new larger issues. This thesis develops a model of internal diffusion and infusion of ES. The ES diffusion model presents the ES implementation as an iterative, cumulative, and virtuous process over time. The model recounts and validates the authentic characteristics of ES projects, places "use" as both product and fomenter of the implementation activity, and putting emphasis upon the importance of experiential learning. The ES infusion model develops a framework of ES capabilities to analyse the extent and quality of the use of ES in organizational contexts (i.e. infusion). To investigate these issues this research has borrowed the perspective of organizational introduction of a technological innovation from the innovation discipline. The scope of the investigation is limited to three selected organizations overseas, which had each already installed at least a single functional component of the system and had decided (or was working on) the diffusion of the system in further departments or locations. The data collection was a combination of retrospective and real-time analysis. Hence, a multiple-case studies for constructing theory from the observed field data was developed.
APA, Harvard, Vancouver, ISO, and other styles
9

Li, Lilong, and Songhua Chen. "Incorporating internal gradient and restricted diffusion effects in Nuclear Magnetic Resonance log interpretation." Diffusion fundamentals 14 (2010) 4, S. 1-5, 2010. https://ul.qucosa.de/id/qucosa%3A13850.

Full text
Abstract:
It is shown that internal gradient combined with the restricted diffusion effect can significantly influence the D-T2 cross plots, which are widely used for fluid typing in Nuclear Magnetic Resonance (NMR) well-logging applications. By using models that capture the most important features of the internal gradient in the sedimentary rocks, such effects can be accounted for in the D-T2 inversion process, making fluid typing more accurate.
APA, Harvard, Vancouver, ISO, and other styles
10

Sigmund, Eric, Ravinder Regatte, Mark Schweitzer, Hyungjoon Cho, and Yi-Qiao Song. "In vivo imaging of signal decay due to diffusion in the internal field in human knee trabecular bone." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-192231.

Full text
Abstract:
This study presents the first demonstration of the MR signal decay due to diffusion in the internal field (DDIF) for in vivo knee trabecular bone imaging. DDIF contrast was compared with high resolution FLASH, T1, and T2* mapping in healthy volunteers. DDIF maps showed spatial variation, superimposed on a T1 background, reflecting trabecular structure. DDIF and T2* maps showed correlated contrast near dense trabeculae, but their spatial textures differed, suggesting distinct structural sensitivities.
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Internal diffusion"

1

Card, David E. The diffusion of Mexican immigrants during the 1990s: Explanations and impacts. Cambridge, MA: National Bureau of Economic Research, 2005.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Dynamics of internal layers and diffusive interfaces. Philadelphia, Pa: Society for Industrial and Applied Mathematics, 1988.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Fairclough, Stuart. Technological diffusion and internal labour markets: A comparative analysis of a British and German bank. [s.l.]: typescript, 1995.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Forman, Christopher. Technology adoption in and out of major urban areas: When do internal firm resources matter most? Cambridge, MA: National Bureau of Economic Research, 2005.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Forman, Christopher. Technology adoption in and out of major urban areas: When do internal firm resources matter most? Cambridge, Mass: National Bureau of Economic Research, 2005.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Egüez, Daniel Bogado. El exodo de profesionales benianos y su impacto en el desarrollo regional. La Paz: Programa de Investigación Estratégica en Bolivia, 2002.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Kiiski, Sampsa. Cross-country diffusion of the Internet. Helsinki: United Nations University, World Institute for Development Economics Research, 2001.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Richard, Rose. Internet diffusion in Russia: A model of a laggard catching up. Aberdeen: Centre for the Study of Public Policy, University of Aberdeen, 2006.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Kumar, Dwivedi Yogesh, Papazafeiropoulou Anastasia, and Choudrie Jyoti, eds. Handbook of research on global diffusion of broadband data transmission. Hershey PA: Information Science Reference, 2008.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

1951-, Khosrowpour Mehdi, ed. E-government diffusion, policy and impact: Advanced issues and practices. Hershey, PA: Information Science Reference, 2008.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Internal diffusion"

1

Lisyansky, A. A., J. H. Li, D. Livdan, N. Garcia, T. D. Cheung, and A. Z. Genack. "Photon Diffusion and Internal Reflectivity." In Photonic Band Gaps and Localization, 171–79. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-1606-8_12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Watari, Fumio, Shigeaki Abe, Kazuchika Tamura, Motohiro Uo, Atsuro Yokoyama, and Yasunori Totsuka. "Internal Diffusion of Micro/Nanoparticles Inside Body." In Bioceramics 20, 95–98. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-457-x.95.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Plascencia, Gabriel, Torstein A. Utigard, Juliana Gutiérrez, David Jaramillo, and Fernando Martínez. "Numerical Model to Describe the Growth of the Internal Oxidation Layer in Binary Alloys." In Defect and Diffusion Forum, 282–87. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/3-908451-36-1.282.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Pong, I., S. C. Hopkins, Xiao Wei Fu, Bartek A. Glowacki, James Elliott, and Alberto Baldini. "Reactive Diffusion in Cu-Nb-Sn Internal Tin Superconducting Wires for the ITER Project." In Defect and Diffusion Forum, 294–98. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/3-908451-36-1.294.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Lawler, Gregory F. "Chapter Seven. Internal Set Theory and Infinitesimal Random Walks." In Diffusion, Quantum Theory, and Radically Elementary Mathematics, edited by William G. Faris, 157–82. Princeton: Princeton University Press, 2006. http://dx.doi.org/10.1515/9781400865253.157.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Baronas, Romas, Feliksas Ivanauskas, and Juozas Kulys. "Modeling Biosensors at Steady State and Internal Diffusion Limitations." In Springer Series on Chemical Sensors and Biosensors, 9–20. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-3243-0_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Squire, Vicki. "Dispersal as Abjectification: The Diffusion of Punitive ‘Internal’ Controls." In The Exclusionary Politics of Asylum, 116–41. London: Palgrave Macmillan UK, 2009. http://dx.doi.org/10.1057/9780230233614_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Higuma, H., Y. Kubo, S. Miyashita, K. Egawa, T. Nagai, F. Uchikawa, and K. Sato. "High Jc Nb3Sn Wires Processed by Internal Tin Diffusion Method." In Advances in Cryogenic Engineering Materials, 915–21. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4757-9053-5_117.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Ahsan, Mohammad, and T. P. Sharma. "Influence of Internal and External Sources on Information Diffusion at Twitter." In Advances in Intelligent Systems and Computing, 430–36. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6067-5_48.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Divinski, Sergiy V., Jai Sung Lee, and Christian Herzig. "Diffusion Properties of Internal Interfaces in Bulk Nanocrystalline Materials: Radiotracer Investigation." In THERMEC 2006, 5019–24. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-428-6.5019.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Internal diffusion"

1

Violi, A., A. F. Sarofim, A. D'Anna, and A. D'Alessio. "Modelling of particulate formation in opposed diffusion flames." In 2001 Internal Combustion Engines. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2001. http://dx.doi.org/10.4271/2001-24-0024.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Wang, Yuehua, YiTao Cao, Yunze Qiu, and YaFeng Qiu. "Analysis of structure characteristics and internal electron diffusion characteristics of GaAs." In International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors 2019, edited by Guru Subramanyam, Partha Banerjee, Akhlesh Lakhtakia, and Karl Gudmundsson. SPIE, 2019. http://dx.doi.org/10.1117/12.2536275.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

YANG, JUNHONG, and WEI CAO. "MODELING OF INTERNAL MOISTURE DIFFUSION ON KIDNEY BEAN SEED THIN LAYER DRYING." In The Proceedings of the 5th Asia-Pacific Drying Conference. World Scientific Publishing Company, 2007. http://dx.doi.org/10.1142/9789812771957_0058.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Shuvalov, Vladimir V., I. V. Shutov, and E. V. Tret'akov. "Fast visualization of internal structure of multiple-scattering objects by diffusion optical tomography." In XVII International Conference on Coherent and Nonlinear Optics (ICONO 2001), edited by Andrey Y. Chikishev, Valentin A. Orlovich, Anatoly N. Rubinov, and Alexei M. Zheltikov. SPIE, 2002. http://dx.doi.org/10.1117/12.468905.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Muncaci, S., S. Boboia, and I. Ardelean. "The effect of diffusion in internal gradients on nuclear magnetic resonance transverse relaxation measurements." In PROCESSES IN ISOTOPES AND MOLECULES (PIM 2013). AIP, 2013. http://dx.doi.org/10.1063/1.4833712.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Cui, X., and B. Q. Li. "Discontinuous Galerkin Method for Internal Thermal Radiation Problems." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42060.

Full text
Abstract:
The internal thermal radiation phenomena are described by a first-order integral-differential equation, which poses an intrinsic problem for the popular diffusion-based Galerkin finite element method. By allowing for discontinuity across the internal inter-element boundaries, the finite element procedure can be adapted to solve the integral-differential equation. This paper discusses a numerical procedure based on the discontinuous Galerkin method for the solution of radiation heat transfer involving participating media. Detailed formulation using the discontinuous Galerkin method for internal radiation heat transfer calculations is given. The coupling of the method with the conventional finite element method for mixed heat transfer calculations is also presented.
APA, Harvard, Vancouver, ISO, and other styles
7

Lee, Po-I., Xiaoce Feng, and Ming-Chia Lai. "Gasoline and E85 Combustion Visualization and Particulate Matter Emission in a Production SIDI Engine With Optical Access." In ASME 2013 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icef2013-19210.

Full text
Abstract:
The present study analyzes the relationship of diffusion flame and PM emission of pure gasoline (E0) and E85 in a spark-ignited direct injection engine at low coolant temperature with optical access on one side of combustion chamber for high speed visualization. Different operating conditions including injection timing, ignition timing, and air-fuel ratio (lambda) with two throttle positions (high and low load) are experimented with a high speed FTIR and an Engine Exhaust Particle Sizer (EEPS) to measure the engine-out emissions. The results show that fuel types and injection timing strongly impact particle size distribution, total concentration, and total mass of PM emission due to piston or cylinder liner wall-wetting. It is concluded that both E0 and E85 present diffusion flame with early injection timing, and the existence of diffusion flame seen in the images corresponds to higher particle mass; however, it does not necessarily represent higher particle number, which is also fuel dependent. In certain conditions, PM emission of E85 could be higher in terms of particle number.
APA, Harvard, Vancouver, ISO, and other styles
8

Alahmari, Saeed, and Kristian Jessen. "An Experimental Investigation of Mass Transfer in Tight Dual-Porosity Systems." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205885-ms.

Full text
Abstract:
Abstract During gas injection in ultra-tight fractured reservoirs, molecular diffusion can play a dominant role in the mass transfer process and enhance recovery by extracting oil components from matrix and delaying gas breakthrough. There has been a growing interest from scholars and operators to study the effect of diffusive mass transfer on the potential incremental recovery from CO2 and rich gas injection. However, many fundamental questions pertaining to the physics of multicomponent multiphase flow and transport are still left unanswered. This paper aims to improve the understanding of multicomponent diffusive mass transfer between matrix and fracture blocks through experimental and modeling work. Displacement experiments were carried out using analog fluids and mesoporous medium to effectively isolate and study the relevant physical mechanisms at play. The experiments were performed in packed columns utilizing silica-gel particles that have internal porosity. The particle size is 40-70 micron with highly controlled internal pore size of 6 nm that makes up approximately 50% of the overall porosity. The quaternary analog fluids system consists of Water, Methanol, Isopropanol, and Isooctane, was used because it mimics the phase behavior of CO2, Methane, Butane and Dodecane mixtures at 2,280 psi and 100°C. Our selection of the analog fluid system and porous medium allowed us to investigate matrix-fracture fluid exchange as observed during an enhanced recovery operation in an ultra-tight fractured system. The effluents from these displacement experiments served as the basis for our analysis of diffusive mass transfer. The role of molecular diffusion in the displacement experiments was investigated by first performing separate diffusion experiments to obtain diffusion coefficients for all relevant binary mixtures. Infinite dilution diffusion coefficients were measured for all binary mixtures and then used to model binary and multicomponent diffusion coefficients over the whole composition range. The accuracy of this approach was determined by performing additional binary diffusion experiments over a broader range of compositions. The displacement experiments were simulated using an in-house simulator and excellent agreement was obtained: The extensive experimental/modeling work related to the diffusion coefficients of the analog fluid system was used in interpreting the diffusive mass transfer between the matrix (stagnant) and fracture (flowing) domains via a 1D linear model. The presented work provides new insights into the role of diffusive mass transfer in ultra-tight fractured systems and builds a framework to highlight the critical data needed to effectively characterize and simulate recovery from such complex geological settings.
APA, Harvard, Vancouver, ISO, and other styles
9

Shkorubskaya, Elena. "Transformation of the Scientific Article Paradigm under Diffusion of Internal & External Publicness of Science." In The Public/Private in Modern Civilization, the 22nd Russian Scientific-Practical Conference (with international participation) (Yekaterinburg, April 16-17, 2020). Liberal Arts University – University for Humanities, Yekaterinburg, 2020. http://dx.doi.org/10.35853/ufh-public/private-2020-09.

Full text
Abstract:
This article discusses the specifics of the public sphere of science in the context of the diffusion of the public and private spheres that characterises modern society and is driven, among other factors, by the development of social media and other tools of online communication. Based on the communicative approach suggested by Jurgen Habermas, the science field concept by Pierre Bourdieu, and the actor-network theory by Bruno Latour, the following two types of modern science publicness are defined. Inner, ‘esoteric publicness’ of science itself is a prerequisite for scientific communication, and is set up on the principles of reasonable doubt and criticism, assuming discussiveness, knowledge, and uncertainty of arguable facts. Outer, ‘broad publicness’ becomes a platform of interaction between science and society, and requires science to provide ultimate knowledge. Using the example of the use of texts of scientific articles in popular scientific texts, the problem of the diffusion of the two public spheres is examined. Firstly, the conventional layman is confronted directly with the inner workings of science, and thus has to deal with discrepancies, which he cannot resolve on his own. Secondly, the pragmatics of the scientific article undergos changes, its conclusions tend to radicalise, and the very article is used only for confirming the credibility of a popular text referring to it. The change in the reader (a professional is replaced by a layperson) has an effect on the original pragmatics of the text and the impact it has on the addressee. What is supposed to serve as the discussion onset in ‘esoteric publicness’, becomes the rationale for the unconditional recognition of communicated information in the ‘broad publicness’ of science.
APA, Harvard, Vancouver, ISO, and other styles
10

Fu, X. "Continuous Tube Forming of the Ta Diffusion Barrier and Cu Stabilizer on Internal-Nb3Sn Subelement." In ADVANCES IN CRYOGENIC ENGINEERING: Transactions of the International Cryogenic Materials Conference - ICMC. AIP, 2004. http://dx.doi.org/10.1063/1.1774592.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Internal diffusion"

1

Schnetzer, G. H., and R. J. Fisher. Measured voltages and currents internal to closed metal cylinders due to diffusion of simulated lightning currents. Office of Scientific and Technical Information (OSTI), August 1994. http://dx.doi.org/10.2172/10181980.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Greenstein, Shane, and Jeff Prince. The Diffusion of the Internet and the Geography of the Digital Divide in the United States. Cambridge, MA: National Bureau of Economic Research, May 2006. http://dx.doi.org/10.3386/w12182.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Lavery, Andone C. Laboratory Measurements of Multi-Frequency and Broadband Acoustic Scattering from Turbulent and Double-Diffusive Microstructure. High-Frequency Broadband Acoustic Scattering from Non-Linear Internal Waves during SW06. Fort Belvoir, VA: Defense Technical Information Center, May 2010. http://dx.doi.org/10.21236/ada521009.

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!

To the bibliography