Bibliografías temáticas / Mass loss coupons

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Literatura académica sobre el tema "Mass loss coupons"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 1 de febrero de 2022

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Artículos de revistas sobre el tema "Mass loss coupons"

Chan, Cesar T., and Kenneth C. Hover. "Assessing Freeze-Thaw Damage in Segmental Retaining Walls Units by Mass Loss, Moisture Gain, and Relative Dynamic Modulus." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 11 (2019): 309–18. http://dx.doi.org/10.1177/0361198119851449.

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Segmental retaining walls (SRWs) constructed of dry-cast concrete masonry units are used in transportation-related applications for which freeze-thaw (FT) durability is evaluated on the basis of percent mass-loss accumulated after multiple FT cycles as per ASTM C1262. This study compared mass loss, mass gain owing to absorption during (FT) exposure, and relative dynamic modulus (RDM) as per ASTM C215. Application of RDM required accounting for the influence of the shape and moisture content of SRW coupons on resonant frequency, with corrections that are likewise applicable to ASTM C666 for ord

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Ekengwu, I. E., O. G. Utu, and K. O. Anyanwu. "Corrosion Inhibition Efficiencies of Polymeric Materials on Alloy Steel in Dilute Hydrochloric Acid and Sodium Hydroxide Solutions at Ambient Temperature." Journal of Engineering Sciences 7, no. 2 (2020): C27—C32. http://dx.doi.org/10.21272/jes.2020.7(2).c5.

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A corrosion control test was conducted on alloy steel, using polymeric coatings (polyurethane, bitumen (medium airing), and high-density polyethylene) in dilute HCl solutions of pH values 4, 7, and 12, respectively for acid, neutral and alkaline solutions at ambient temperature. In the study, Eighty-four coupons of alloy steel were used. The coupons were mechanized, ground, polished, etched with natal, and weighed using a digital weighing balance (Beva 206B). The mass of each coupon was recorded according to the tag number on them. Twenty-one of the coupons were coated with polyurethane, 21 co

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Švadlena, Jan, Tomáš Prošek, Kristýna Charlotte Strachotová, and Milan Kouřil. "Chemical Removal of Lead Corrosion Products." Materials 13, no. 24 (2020): 5672. http://dx.doi.org/10.3390/ma13245672.

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Restoration treatment, specimen preparation or mass loss measurements on coupons made of lead require a reliable process of dissolution of corrosion products. In this study, several types of model corrosion products with compositions representative of those found on real objects were prepared and characterized. Ten solutions were then thoroughly tested in interval cleaning experiments, regarding the efficiency of removal of the corrosion products, corrosivity towards bare lead, and remnants left on the surface. The solution recommended in the current version of the ISO 8470 standard was found

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Khodabux, Waseem, Paul Causon, and Feargal Brennan. "Profiling Corrosion Rates for Offshore Wind Turbines with Depth in the North Sea." Energies 13, no. 10 (2020): 2518. http://dx.doi.org/10.3390/en13102518.

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Corrosion in the marine environment is a complex and expensive form of damage. It is commonly studied by the deployment of coupons that reflect the marine corrosion a structure will experience, thus allowing design and maintenance prevention strategies to be developed accordingly. This study stems from the lack of information in the literature regarding the profiling of corrosion with respect to marine depth in the North Sea where important wind farm developments have been undertaken. To address such issue a field experiment has been designed and carried out in the vicinity of the Westermost R

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Silva, J. W. J., A. P. O. Belo, R. B. Ribeiro, and N. T. Matias. "Effects of Sodium Nitrite, Sodium Dichromate and Benzoic Acid as Inhibitors in the Protection of Mild Steel in Water." Materials Science Forum 802 (December 2014): 433–39. http://dx.doi.org/10.4028/www.scientific.net/msf.802.433.

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In Petrobrás SA refineries, there are thousands of heat exchangers in which cooling water is treated for recycling, often by outsourced companies. In all of these refineries there happens shutdown for corrective maintenance of the exchangers by problems related to corrosion caused by the cooling water, requiring about four days to repair a unit. The shutdown of a production line results in loss of revenue between U$ 200,000.00 and U$ 300,000.00 per day. To control the cooling water quality, it is used coupons for corrosion analysis. Tests are limited to visual inspection and by mass loss anal

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Amerinatanzi, Amirhesam, Reza Mehrabi, Hamdy Ibrahim, Amir Dehghan, Narges Shayesteh Moghaddam, and Mohammad Elahinia. "Predicting the Biodegradation of Magnesium Alloy Implants: Modeling, Parameter Identification, and Validation." Bioengineering 5, no. 4 (2018): 105. http://dx.doi.org/10.3390/bioengineering5040105.

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Magnesium (Mg) and its alloys can degrade gradually up to complete dissolution in the physiological environment. This property makes these biomaterials appealing for different biomedical applications, such as bone implants. In order to qualify Mg and its alloys for bone implant applications, there is a need to precisely model their degradation (corrosion) behavior in the physiological environment. Therefore, the primary objective develop a model that can be used to predict the corrosion behavior of Mg-based alloys in vitro, while capturing the effect of pitting corrosion. To this end, a custom

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Sanz Saiz, Carlos, Jesús Polo Martínez, and Nuria Martín Chivelet. "Influence of Pollen on Solar Photovoltaic Energy: Literature Review and Experimental Testing with Pollen." Applied Sciences 10, no. 14 (2020): 4733. http://dx.doi.org/10.3390/app10144733.

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This work attempts to shed some light on the impact of organic soiling due to pollen on solar photovoltaic (PV) power generation. Apart from introducing several soiling-related pollen features, the previous works reporting soiling by pollen have been reviewed. Local observations from late winter to early spring showed that a rooftop PV system experienced both uniform and non-uniform soiling issues, which were mainly caused by pollen from nearby cypress specimens. In addition, this work publishes preliminary results regarding an artificial soiling test performed with pollen. In this test, soda

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Yakubu, Suleiman Idawu, Rufai Ochu Suleiman, Rasheed Agava, Ogheneme Clifford, and Emokpaire Steven. "Adsorption and thermodynamics properties of acacia tortilis as corrosion inhibitor of aluminum metal matrix composites in acidic medium." Metallurgical and Materials Engineering 23, no. 2 (2017): 153–66. http://dx.doi.org/10.30544/281.

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Acacia tortilis (AT) was extracted and characterized by gas chromatography-mass spectrometry (GC-MS). The eco-friendly corrosion inhibitor for aluminum matrix composites was investigated in 1.0 M HCl at 30-60 °C. The concentration of the inhibitor and time were varied in the range of 0 – 10 % v/v and 24-144 h. The inhibition studies were carried out using gravimetric method and potentiodynamic polarization. The surface morphology of the coupons was characterized by SEM/EDS techniques. The GC-MS revealed some elements/compounds (NCS, C-H, N or O). The inhibition efficiency increased with concen

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Gopi, K. R., and R. Nagarajan. "Application of Power Ultrasound in Cavitation Erosion Testing of Nano-Ceramic Particle/Polymer Composites." Solid State Phenomena 136 (February 2008): 191–204. http://dx.doi.org/10.4028/www.scientific.net/ssp.136.191.

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Cavitation erosion is predominant in pipelines for liquid transportation, causing damage to pipe wall, impeller and their accessories. The present study is focused on development of cavitation -wear resistant nano-ceramic particle-reinforced polymer matrix material; and on study of its feasibility to be used as lining material in hydraulic transportation. The polymer/nano composite is fabricated using power ultrasound in all three process steps: synthesis of nano-dimensional particles of white fused alumina (WFA) from micron size particles, optimized blending and finally reinforcement into pol

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Ashirgade, A., P. B. Harakuni, and W. J. Vanooij. "Effects of Aging on the Morphology of Rubber-Brass Interfacial Layer." Tire Science and Technology 39, no. 1 (2011): 20–43. http://dx.doi.org/10.2346/1.3555084.

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Abstract Adhesion between rubber compound and brass-plated steel tire cord is crucial in governing the overall performance of tires. The rubber-brass interfacial adhesion is influenced by the chemical composition and thickness of the interfacial layer. It has been shown that the interfacial layer consists mainly of sulfides and oxides of copper and zinc. This paper discusses the effect of changes in the chemical composition and the structure of the interfacial layers due to addition of adhesion promoter resins. Grazing incidence x-ray diffraction (GIXRD) experiments were run on sulfidized poli

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Tesis sobre el tema "Mass loss coupons"

Rocha, Thiago Ramalho da. "Reavalia??o da efici?ncia de ?leo de coco saponificado e de sua microemuls?o como inibidores de corros?o em uma c?lula eletroqu?mica." Universidade Federal do Rio Grande do Norte, 2008. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17598.

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Made available in DSpace on 2014-12-17T15:41:43Z (GMT). No. of bitstreams: 1 ThiagoRR.pdf: 1895833 bytes, checksum: 59d0cd6d03df2b5c8165e3ae0bf39a80 (MD5) Previous issue date: 2008-04-25<br>Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico<br>An interesting development in surfactants science and technology is their application as corrosion inhibitors, since they act as protective films over anodic and cathodic surfaces. This work aims to investigate the efficiency of saponified coconut oil (SCO) as corrosion inhibitor and of microemulsified system (SCO + butanol + kerosene oil +

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Moyne, Christian. "Transferts couples chaleur-masse lors du séchage prise en compte du mouvement de la phase gazeuse /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37608257t.

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Moyne, Christian. "Transferts couples chaleur-masse lors du séchage : prise en compte du mouvement de la phase gazeuse." Vandoeuvre-les-Nancy, INPL, 1987. http://www.theses.fr/1987NAN10348.

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Développement d'un modèle mathématique prenant en compte la filtration en phase liquide et gazeuse. Aux gradients de température et d'humidité, il ajoute le gradient de pression totale de la phase gazeuse comme troisième force motrice. Discussion théorique des transferts convectifs et diffusifs en phase gazeuse en milieu poreux. La notion de conductivité thermique des milieux humides fortement influencée par les mécanismes d'évaporation condensation est alors réexaminée. Prise en compte des effets de filtration pour deux cas particuliers: le séchage sous vide et le séchage convectif avec un fl

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Aklouche, Leila. "Modélisation des transferts couplés masse-chaleur dans un matériau amylacé lors des hydrotraitements par haute pression : caractérisations physicochimiques et thermophysiques." Thesis, La Rochelle, 2019. http://www.theses.fr/2019LAROS025.

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Cette thèse vise d’une part à la compréhension des modifications physicochimiques engendrées dans la structure interne d’un matériau biopolymère lors des hydrotraitements par haute pression et d’autre part à la modélisation des transferts couplés chaleur-humidité. L’amidon de maïs standard a été choisi comme matériau modèle. Quatre procédés hydrothermiques ont été étudiés; DV-HMT (Direct Vapor-Heat Moisture Treatment), RP-HMT (Reduced Pressurized-HMT), IV-HMT (Intensive Vacuum-HMT) et FV-HMT (Final Vacuum-HMT). La prédiction de l’évolution de la température (T) et de la teneur en eau (W) au se

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CHAKIR, ABDELLAH. "Etude des transferts couples de chaleur et de masse dans des planches de chêne, lors du séchage convectif et sous vide." Poitiers, 1993. http://www.theses.fr/1993POIT2333.

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Le but de ce travail est l'etude des transferts au sein du bois au cours du sechage convectif et sous vide en vue de l'amelioration de la conduite de sechoirs industriels. Le premier chapitre est consacre a une etude bibliographique du developpement de la modelisation des phenomenes de transferts dans les milieux poreux. Le deuxieme chapitre analyse les caracteristiques physiques du materiau poreux necessaires a la modelisation des mecanismes physiques. Le modele developpe ici pour decrire les transferts couples de chaleur et de masse lors du sechage est base sur la formulation de prise de moy

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Magalhães, Luciano da Rocha. "Contribuição ao estudo da Erosão-corrosão de um Aço de Baixo Carbono na presença de Água contendo 3,5% de sal, areia e Inibidor de Corrosão." Universidade Federal de Uberlândia, 2018. http://dx.doi.org/10.14393/ufu.te.2018.757.

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CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>A extração de petróleo em águas profundas impõe diversos desafios às empresas de óleo e gás e, dentre eles, destaca-se o desgaste sofrido na parte interna dos dutos de transporte devido à ação da água produzida (elevado teor salino), gases e particulados, principalmente a areia produzida. O objetivo deste trabalho foi estudar a erosão-corrosão de um aço com baixo teor de carbono (VMEC 134AP) em um flowloop sob condições dinâmicas: fluido em escoamento c

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Capítulos de libros sobre el tema "Mass loss coupons"

Bonnet, Doris, and Véronique Duchesne. "Infécondité, procréation médicale et inégalités sociales." In Inégalités en perspectives. Editions des archives contemporaines, 2019. http://dx.doi.org/10.17184/eac.1628.

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Le développement des technologies de la reproduction, et notamment de la fécondation in vitro (FIV), permet aujourd’hui à certains couples (hétérosexuels) infertiles africains d’avoir un enfant. L’offre d’assistance médicale à la procréation (AMP) s’inscrit dans un système de soins libéral qui s’adresse prioritairement aux classes moyennes et urbaines. Certains couples ne trouvent pas dans leur pays les conditions ou les techniques recherchées et sont amenés à se déplacer à leurs frais dans des pays limitrophes ou encore en Europe ou aux États-Unis. D’autres couples résident en France où l’AMP est encadrée par les lois de bioéthique. Ce chapitre montre comment l’espace mondialisé de la reproduction renvoie à un rapport inégalitaire aux biotechnologies de la reproduction des couples africains infertiles selon leurs conditions socio-économiques, mais aussi selon leur lieu de résidence. Ce contexte renvoie au cadre théorique de la « reproduction stratifiée ».

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Holmes, Amy Austin. "يسقط‎ يسقط‎ حكم‎ العسكر‎ “Down, Down with Military Rule”." In Coups and Revolutions. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190071455.003.0004.

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After Hosni Mubarak stepped down, Egypt was ruled by the Supreme Council of Armed Forces (SCAF). During this time, a new form of antimilitarist activism emerged for the first time in Egyptian history. Of the three waves of antigovernment uprisings, this one was perhaps the most revolutionary: the goal was not to topple a single person or to hold elections but rather to dismantle the entrenched power of the armed forces. This chapter offers insights into these groups that fall in between the Muslim Brotherhood/military dichotomy. Many of these groups were led by women. After Mubarak was ousted, certain private companies celebrated the revolution in their advertising, but opposition to the SCAF was never commercialized. Despite egregious human rights abuses committed under the SCAF, neither the business elite nor the United States ever withdrew support from the military junta. However, the SCAF did lose popular support, evidenced when mass protests emerged in July during the Tahrir sit-in, and then again during the Battle of Mohamed Mahmoud in November–December 2011.

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Actas de conferencias sobre el tema "Mass loss coupons"

Chevil, Karina, Abdoulmajid Eslami, Weixing Chen, et al. "Developing Cathodic Protection Based on Disbondment Geometry." In 2012 9th International Pipeline Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ipc2012-90675.

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Coating disbondment on pipelines is a common phenomenon that leads to exposure of the pipeline metal to ground water solutions, promoting a corrosive environment which is associated with stress corrosion cracking (SCC). This investigation tracks the corrosion behavior of X-65 steel at different coating disbondments at Open Circuit Potential (OCP) conditions through weight loss tests, as well as SEM analysis. For the weight loss test, X-65 coupons were placed into a vertical coupon holder with varying gap sizes between the coupons and the shielding (2 mm 5 mm, and 10 mm) simulating the coating

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Choi, Alexander, Tyler Luneski, Zbigniew M. Bzymek, Vito Moreno, and Geri Gonxhe. "A Search for Optimal Friction Resistant Material to Cover Contact Surfaces: A Case Study in the Senior Mechanical Engineering Design Student Project." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65481.

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The University of Connecticut Department of Mechanical Engineering has developed an industry recognized Senior Design Capstone course that provides students the opportunity for a major design experience. This paper will discuss the issues and challenges associated with project demonstrated on the base of the Search for Optimal Friction Resistant Material to Cover Contact Surfaces in an Electric Manual Switch. In order to determine the viability of potential substitute materials, the team produced custom testing rigs to evaluate material wear and corrosion performance. The construction of these

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Owston, Rebecca, and Dalton McKeon. "Formulation and Experimental Validation of a New Erosion Flow Model." In 2016 11th International Pipeline Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ipc2016-64064.

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In the present work, a multivariable study has been conducted to systematically evaluate the effects of impact angle, material hardness, flow rate, sand concentration, particle size, and fluid viscosity on erosion. Experimental testing consisted of a submerged sand slurry jet impacting a flat plate in different orientations. Weight loss data, as well as profilometer surface scans have been collected on coupons to fully define the erosion. Empirical data trends were evaluated to provide insights into functional relationships between erosion rate and the parameters varied in the study. Interesti

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Lee, Shang-Hsiu, and Marco J. Castaldi. "High Temperature Corrosion Resistance of Different Commercial Alloys Under Various Corrosive Environments." In 15th Annual North American Waste-to-Energy Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/nawtec15-3220.

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High temperature corrosion is a major operating problem because it results in unscheduled shutdowns in Waste-to-Energy (WTE) plants and accounts for a significant fraction of the total operating cost of WTE plants. Due to the heterogeneous nature of municipal solid waste (MSW) fuel and the presence of aggressive elements such as sulfur and chlorine, WTE plants have higher corrosion rates than coal-fired power plants which operate at higher temperature. To reduce corrosion rates while maximizing the heat recovery efficiency has long been a critical task for WTE operators. Past researchers focus

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Ochmann, Lukas, Moh'd M. Amro, Bernd Gronde, Gundula Fischer, Silke Weber, and Dirk Martin. "Development of Plasma Sprayed Coatings to Improve the Erosion Resistance of Wire Wrapped Screens." In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21158-ms.

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Abstract The installation of sand screens in wells can fail in one of two ways: by causing an unacceptable high pressure drop in the near wellbore area or by losing the ability to retain particles. Four mechanisms can lead to a failure: plugging, corrosion, erosion and mechanical deformation. To increase the lifetime under erosive conditions, a coating for wire wrapped screens was developed and tested. Erosion occurs, when formation particles hit the screen surface with high velocities or by continuous production of fines through the screen openings. The screen openings must keep a specified s

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Ibrahim, Hamdy, Andrew D. Klarner, Behrang Poorganji, David Dean, Alan A. Luo, and Mohammad Elahinia. "The Effect of Heat-Treatment on Mechanical, Microstructural, and Corrosion Characteristics of a Magnesium Alloy With Potential Application in Resorbable Bone Fixation Hardware." In ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8822.

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Mg alloys are promising materials for bone implant applications mainly due to their low specific density, desirable stiffness and bioresorbability in the human body. Mg-Zn-Ca alloys are among the most promising materials for resorbable orthopedic fixation devices due to their superior biocompatibility. However, the mechanical and corrosion properties of the as-cast Mg-Zn-Ca alloys are insufficient. Heat treatment is a practical approach for strengthening Mg alloys especially after the fabrication of porous structures and 3D-printed components. We have investigated heat treatment of these devic

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Reed, John A., and Mark G. Turner. "An Entropy Loss Approach for a Meanline Bladerow Model With Coupling to Test Data and 3D CFD Results." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-68608.

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A methodology which couples a computational fluid dynamics simulation and a ID meanline bladerow model employing entropy-based loss terms is presented. A 3D APNASA CFD flow solution of the GE90-94B was used to provide input to the 1D bladerow model, which computed entropy-generation terms from the flow state. These terms accounted for losses in mixing of leakage and cooling flow, and gross aerodynamics using bladerow entropy loss coefficients as defined by Denton. A description of the 1D model is presented. The 1D bladerow model was implemented in the NPSS system making it possible to easily c

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Tregillis, I. L., and Aaron Koskelo. "Analytic Solutions As a Tool for Verification and Validation of a Multiphysics Model." In ASME 2019 Verification and Validation Symposium. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/vvs2019-5137.

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Abstract Computational physicists are commonly faced with the task of resolving discrepancies between the predictions of a complex, integrated multi-physics numerical simulation and corresponding experimental datasets. Such efforts commonly require a slow iterative procedure. However, a different approach is available in cases where the multi-physics system of interest admits closed-form analytic solutions. In this situation, the ambiguity is conveniently broken into separate consideration of theory-simulation comparisons (issues of verification) and theory-data comparisons (issues of validati

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Marple, B. R., and J. Voyer. "Improved Wear Performance by the Incorporation of Solid Lubricants During Thermal Spraying." In ITSC 2000, edited by Christopher C. Berndt. ASM International, 2000. http://dx.doi.org/10.31399/asm.cp.itsc2000p0909.

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Abstract For components that are required to function in sliding or rubbing contact with other parts, degradation often occurs through wear due to friction between the two contacting surfaces. Depending on the nature of the materials being used, the addition of water as a lubricant may introduce corrosion and accelerate the degradation process. To improve the performance and increase the life of these components, coatings may be applied to the regions subject to the greatest wear. These coatings may be engineered to provide internal pockets of solid lubricant in order to improve the tribologic

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Felicelli, Sergio D., and David R. Poirier. "Modeling of Solidification and Filling of Thin-Section Castings." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72682.

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A finite element model for simulating dendritic solidification of multicomponent-alloy castings is used to study the filling and solidification of castings of thin cross section. The model solves the conservation equations of mass, momentum, energy, and alloy components and couples the solution with the thermodynamic of the multicomponent alloy through a phase diagram equation. The transport of mass and energy in the mushy zone is done considering the mushy zone as a porous medium of variable porosity. The same set of conservations equations are used for the liquid, solid and mushy zones, in w

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