Relevant bibliographies by topics / Voids related to solidification

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers
  5. Reports

Academic literature on the topic 'Voids related to solidification'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Voids related to solidification.'

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 "Voids related to solidification"

1

Meshram, Suresh, and Madhusudhan Reddy. "Influence of Tool Tilt Angle on Material Flow and Defect Generation in Friction Stir Welding of AA2219." Defence Science Journal 68, no. 5 (2018): 512–18. http://dx.doi.org/10.14429/dsj.68.12027.

Full text
Abstract:
Heat treatable aluminium alloy AA2219 is widely used for aerospace applications, welded through gas tungsten and gas metal arc welding processes. Welds of AA2219 fabricated using a fusion welding process suffers from poor joint properties or welding defects due to melting and re-solidification. Friction stir welding (FSW) is a solid-state welding process and hence free from any solidification related defects. However, FSW also results in defects which are not related to solidification but due to improper process parameter selection. One of the important process parameters, i.e., tool tilt angl
APA, Harvard, Vancouver, ISO, and other styles
2

Zhou, Jun, and Hai-Lung Tsai. "Porosity Formation and Prevention in Pulsed Laser Welding." Journal of Heat Transfer 129, no. 8 (2006): 1014–24. http://dx.doi.org/10.1115/1.2724846.

Full text
Abstract:
Porosity has been frequently observed in solidified, deep penetration pulsed laser welds. Porosity is detrimental to weld quality. Our previous study shows that porosity formation in laser welding is associated with the weld pool dynamics, keyhole collapse, and solidification processes. The objective of this paper is to use mathematical models to systematically investigate the transport phenomena leading to the formation of porosity and to find possible solutions to reduce or eliminate porosity formation in laser welding. The results indicate that the formation of porosity in pulsed laser weld
APA, Harvard, Vancouver, ISO, and other styles
3

Nelson, J. S., and E. M. Sparrow. "Freezing in the Presence of Rotation." Journal of Heat Transfer 107, no. 4 (1985): 804–11. http://dx.doi.org/10.1115/1.3247507.

Full text
Abstract:
Freezing of a phase-change medium in a sealed, rotating cylindrical capsule was studied experimentally. The axis of rotation was either colinear with the axis of the capsule or perpendicular to the axis of the capsule, with corresponding maximum centrifugal forces of about 2g and 4 1/2g. The role of rotation differed depending on whether the capsule was fully or partially filled with liquid at the onest of freezing. For the fully filled capsule, rotation-related effects occurred only when the liquid was initially superheated relative to the fusion temperature. Rotation, acting via the Coriolis
APA, Harvard, Vancouver, ISO, and other styles
4

Sulfredge, C. David, Louis C. Chow, and Kaveh A. Tagavi. "INITIATION AND GROWTH OF SOLIDIFICATION SHRINKAGE VOIDS." Annual Review of Heat Transfer 10, no. 10 (1999): 221–78. http://dx.doi.org/10.1615/annualrevheattransfer.v10.80.

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

Xiao, J. Z., and H. W. Kui. "Solidification of undercooled molten Cu30Ni70." Journal of Materials Research 14, no. 5 (1999): 1771–81. http://dx.doi.org/10.1557/jmr.1999.0239.

Full text
Abstract:
Recently, it was demonstrated that grain refinement in undercooled Cu30Ni70 is brought about by a remelting of those initially formed dendrites (termed novel dendrites) which are unstable against melting. Also, it was found that in the same transition regime, there is a sharp drop in the specific volume of the undercooled specimens. Before entering into the transition regime, the novel dendrites found in an undercooled specimen are arranged in a regular pattern and the microstructures consist of large dendrites. Voids are found mainly at the dendritic spacings of the large dendrites. On the ot
APA, Harvard, Vancouver, ISO, and other styles
6

Wang, Daijiao, and Ronald L. Panton. "Effect of Reversing Heat Flux Direction During Reflow on Void Formation in High-Lead Solder Bumps." Journal of Electronic Packaging 127, no. 4 (2005): 440–45. http://dx.doi.org/10.1115/1.2070047.

Full text
Abstract:
Experiments were carried out to investigate the effect of reversing the heat flux direction during cooling on the formation of voids during the reflow process. Under different upward and downward solidification conditions, 480 high-lead (90Pb∕8Sn∕2Ag) solder joints of flip-chip assemblies were processed. The solder samples were then microsectioned to determine the size and location of voids. The results show that reversing the flow direction during cooling has a significant effect on the final void formation. For the case of the melting direction from top (flip-chip side) to bottom (test board
APA, Harvard, Vancouver, ISO, and other styles
7

Rashed, Ahmed I., and Robert Brady Williamson. "Microstructure of entrained air voids in concrete, Part I." Journal of Materials Research 6, no. 9 (1991): 2004–12. http://dx.doi.org/10.1557/jmr.1991.2004.

Full text
Abstract:
The microstructure of air voids in both air-entrained and non air-entrained paste, mortar, and concrete has been studied at different ages (5 min to 60 days) in order to understand how air-entrained voids form in portland-cement systems. Scanning electron micrographs of air voids are presented for different ages. The solidification process of portland-cement paste and mortar was frozen at different ages using a low temperature scanning electron microscope and freeze drying. At very early ages the air voids show thin shells made of very fine particles. The packing of the cement grains behind th
APA, Harvard, Vancouver, ISO, and other styles
8

Zhang, T., and J. R. G. Evans. "The solidification of large sections in ceramic injection molding: Part II. Modulated pressure molding." Journal of Materials Research 8, no. 2 (1993): 345–51. http://dx.doi.org/10.1557/jmr.1993.0345.

Full text
Abstract:
Cylindrical moldings of 20 and 40 mm diameter were injection molded with the application of modulated hold pressure using a well-characterized alumina-polypropylene suspension. The effect of frequency on sprue solidification was explored. For the smaller moldings, very little extension to sprue solidification time was obtained with pressures up to 140 MPa, and this is attributed to the low reciprocating volume flow. For the larger moldings, pressures of 98 MPa were sufficient to produce moldings with neither voids nor cracks, and the sprue solidification time corresponded to the time needed fo
APA, Harvard, Vancouver, ISO, and other styles
9

Rashed, Ahmed I., and Robert Brady Williamson. "Microstructure of entrained air voids in concrete, Part II." Journal of Materials Research 6, no. 11 (1991): 2474–83. http://dx.doi.org/10.1557/jmr.1991.2474.

Full text
Abstract:
The microstructure of air voids in both air-entrained and non air-entrained paste, mortar, and concrete containing silica fume has been studied at different ages (5 min to 60 days) in order to understand how air-entrained voids form in portland cement–silica fume systems. Scanning electron micrographs of air voids are presented for many different ages. The solidification process of portland cement–paste and mortar was frozen at different ages using both a low-temperature scanning electron microscope and freeze drying. During the course of these experiments, it was discovered that air voids can
APA, Harvard, Vancouver, ISO, and other styles
10

Gudibande, Niranjan, and Kannan Iyer. "Thermal Shrinkage–Based Model for Predicting the Voids During Solidification of Lead." Nuclear Technology 196, no. 3 (2016): 674–83. http://dx.doi.org/10.13182/nt16-40.

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

Dissertations / Theses on the topic "Voids related to solidification"

1

Alves, Luiz Henrique Dias [UNESP]. "Utilização do método de Taguchi na modelagem e otimização de vazios relacionados à solidificação em processo de fundição de aço ABNT 1030." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/106431.

Full text
Abstract:
Made available in DSpace on 2014-06-11T19:35:40Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-12-18Bitstream added on 2014-06-13T20:46:43Z : No. of bitstreams: 1 alves_lhd_dr_guara.pdf: 2379670 bytes, checksum: 1a59c87cd9293dbd93fa101676adf89e (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>O grande número de variáveis envolvidas no processo de fundição de aço o torna muito susceptível a ocorrência de defeitos relacionados à solidificação como rechupes e poros, que elevam o custo de fabricação devido ao sucateamento e retrabalho de peças. Explorando o
APA, Harvard, Vancouver, ISO, and other styles
2

Alves, Luiz Henrique Dias. "Utilização do método de Taguchi na modelagem e otimização de vazios relacionados à solidificação em processo de fundição de aço ABNT 1030 /." Guaratinguetá : [s.n.], 2009. http://hdl.handle.net/11449/106431.

Full text
Abstract:
Resumo: O grande número de variáveis envolvidas no processo de fundição de aço o torna muito susceptível a ocorrência de defeitos relacionados à solidificação como rechupes e poros, que elevam o custo de fabricação devido ao sucateamento e retrabalho de peças. Explorando oportunidades neste cenário, esta Tese de Doutorado, desenvolvida dentro do ambiente industrial de uma fundição de aço propõe um modelo matemático capaz de predizer a combinação de níveis de variáveis de processo que minimizam a ocorrência de rechupes e poros relacionados à solidificação em peças fundidas em aço ABNT 1030, mol
APA, Harvard, Vancouver, ISO, and other styles
3

Pagalthivarthi, Krishnan V. "Thermosolutal convection and related transport processes in binary alloy solidification." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/18245.

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

Ahmad, Nasir. "Numerical simulation of transport processes in multicomponent systems related to solidification problems /." [S.l.] : [s.n.], 1995. http://library.epfl.ch/theses/?nr=1349.

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

Brewster, G. J. J. "Solidification and heat-treatment related defects in single crystal nickel-base superalloys." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.596900.

Full text
Abstract:
This thesis examines the causes of surface scale, surface inter-dendritic phase formation and surface melting. These effects hinder component inspection and lead to extensive rework operations and component scrap. Surface scale is a region of colouration observed on the external surface of cast components. It has been shown to occur in the solid-state and to result from the differential thermal contraction between the mould and metal, driving separation during the casting process. The regions of the casting that separate from the mould are exposed to the casting atmosphere, resulting in the fo
APA, Harvard, Vancouver, ISO, and other styles
6

Park, Sung-Min. "A study of hydrogen and solidification cracking in steel weld metal related to solidificaion behavior /." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1272467129.

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

Hourahine, Benjamin. "A first principles study of hydrogen related defects in silicon." Thesis, University of Exeter, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324743.

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

Sterud, Erik. "Stabilisering av tjärförorenat sediment i området Kolkajen-Ropsten." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-336883.

Full text
Abstract:
Sedimenten i området Kolkajen-Ropsten, Stockholm, innehåller höga halter av tjäroljor till följd avtidigare produktion i gasverket på området. Stockholms stad planerar att utföra byggnation i detnuvarande vattenområdet, vilket ökar risken för spridning av föroreningar. För att skydda arbetandeunder planerad byggnation och framtida boende måste föroreningssituationen åtgärdas. Tjäroljornainnehåller höga halter av polyaromatiska kolväten (PAH) och det är föroreningen av PAH-16 som styråtgärdsbehovet för området. En metod som använts med god framgång i flera projekt i Norden ochandra delar av vär
APA, Harvard, Vancouver, ISO, and other styles
9

Baheti, Varun A. "Diffusion-Controlled Growth of Phases in Metal-Tin Systems Related to Microelectronics Packaging." Thesis, 2017. http://etd.iisc.ernet.in/2005/3985.

Full text
Abstract:
The electro–mechanical connection between under bump metallization (UBM) and solder in flip–chip bonding is achieved by the formation of brittle intermetallic compounds (IMCs) during the soldering process. These IMCs continue to grow in the solid–state during storage at room temperature and service at an elevated temperature leading to degradation of the contacts. In this thesis, the diffusion–controlled growth mechanism of the phases and the formation of the Kirkendall voids at the interface of UBM (Cu, Ni, Au, Pd, Pt) and Sn (bulk/electroplated) are studied extensively. Based on the microst
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Voids related to solidification"

1

Diószegi, Attila, Peter Svidró, Lennart Elmquist, and Izudin Dugic. "Defect Formation Mechanisms in Lamellar Cast Iron Related to the Casting Geometry." In Advances in the Science and Engineering of Casting Solidification. John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093367.ch30.

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

Diószegi, Attila, Peter Svidró, Lennart Elmquist, and Izudin Dugic. "Defect Formation Mechanisms in Lamellar Cast Iron Related to the Casting Geometry." In Advances in the Science and Engineering of Casting Solidification. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48117-3_30.

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

"Titles of Related Interest." In F. Weinberg International Symposium on Solidification Processing. Elsevier, 1990. http://dx.doi.org/10.1016/b978-0-08-040413-4.50001-4.

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

"Symposium K: Solidification, Deformation and Related Processing." In PRICM. John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118792148.part11.

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

Kumar Mohanty, Upendra, and Hrushikesh Sarangi. "Solidification of Metals and Alloys." In Casting Processes [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94393.

Full text
Abstract:
In order to analyse the process of solidification of metals and alloys critically, it is most pertinent to understand the different modes of nucleation and the uneven rates of growth throughout the melt. It is also important to take a note of the constraints in the growth process that definitely influence the crystal structure and the structure related properties of the casting. The freezing pattern of the liquid melt decides the feeding of the mould which is instrumental in producing a complete and compact casting. For pure metals and even in case of alloys with a narrow freezing range a well defined solid–liquid macro-interface exists. Here feeding of the solidifying casting is the easiest, by the common lowering of the liquid metal surface in the mould. However, in many instances, a well defined interface is not witnessed. The solid–liquid interface could be discrete and not continuous. Here process of feeding the solidification sites that witness considerable shrinkages, may become complicated. On grounds of above it is implied, the process of solidification constitutes an important aspects in the production of a defect free casting.
APA, Harvard, Vancouver, ISO, and other styles
6

Purnat, Tina D., Paolo Vacca, Stefano Burzo, et al. "WHO Digital Intelligence Analysis for Tracking Narratives and Information Voids in the COVID-19 Infodemic." In Studies in Health Technology and Informatics. IOS Press, 2021. http://dx.doi.org/10.3233/shti210326.

Full text
Abstract:
The COVID-19 pandemic is the first to unfold in the highly digitalized society of the 21st century and is therefore the first pandemic to benefit from and be threatened by a thriving real-time digital information ecosystem. For this reason, the response to the infodemic required development of a public health social listening taxonomy, a structure that can simplify the chaotic information ecosystem to enable an adaptable monitoring infrastructure that detects signals of fertile ground for misinformation and guides trusted sources of verified information to fill in information voids in a timely manner. A weekly analysis of public online conversations since 23 March 2020 has enabled the quantification of running shifts of public interest in public health-related topics concerning the pandemic and has demonstrated the frequent resumption of information voids relevant for public health interventions and risk communication in an emergency response setting.
APA, Harvard, Vancouver, ISO, and other styles
7

Junejo, Sadia, Adnan Pitafi, and Arabella Bhutto. "Economic Development and Growth Perspectives in Entrepreneurship." In Developing Entrepreneurial Ecosystems in Academia. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-8505-4.ch010.

Full text
Abstract:
In developing countries, entrepreneurship is seen as a phenomenon related to the growth of the economy. Innovative start-ups feed the country's economy and contribute to reducing unemployment. The aim is to identify the voids to understand how entrepreneurs can better serve their country. Therefore, the authors evaluated the concepts of how entrepreneurs can effectively serve developing economies. The role of entrepreneurial factors such as entrepreneurial self-efficacy and entrepreneurial eco-systems in creating entrepreneurial intention is discussed along with the implementation of entrepreneurial learning in multiple disciplines to help reduce innovative obstacles.
APA, Harvard, Vancouver, ISO, and other styles
8

Aristizábal Tamayo, Juan Manuel, Edwin Tarapuez, and Juan Carlos Vasquez. "Application of a Fuzzy System to the Analysis of Entrepreneurial Intention in Brazil, Mexico, and Colombia." In Advances in Business Strategy and Competitive Advantage. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2019-2.ch013.

Full text
Abstract:
Asymmetries in the relative growth of Latin American countries and the disparities in both institutional performance and cultural aspects validate the search for new explanations in analyzing the role of entrepreneurship in economic growth. In this sense, although the study of entrepreneurial intention (EI) has received greater attention in the setting of academic research and design of public policy, the literature voids remain related with the treatment of the phenomenon as a multidimensional problem in situations in which the information available is scarce and not structured. Due to the aforementioned, this document proposes a mathematical model based on fussy logic techniques from the study of the factors that impact upon the EI of undergraduate students in administration in three Latin American countries: Brazil, Mexico, and Colombia.
APA, Harvard, Vancouver, ISO, and other styles
9

Dietrich, Nikolaus. "Narrative, Experience, and the Image." In Experience, Narrative, and Criticism in Ancient Greece. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198848295.003.0013.

Full text
Abstract:
This chapter addresses the issue of narrative and experience from the perspective of ancient images, and with a focus on sculpture, a medium which does not seem particularly appropriate for pictorial narrative. As a first step, it discusses this evident lack of congruence between pictorial narrative and sculpture, and show ways in which narrative can, nevertheless, function in sculpture. For this purpose, it introduces a general distinction between two kinds of image-related ‘presence’ with reference to the case of the Knidian Aphrodite. This distinction then serves as a hermeneutical tool in the discussion of the chapter’s main categorical focus, namely the incomplete copies of sculptural groups. The analysis of this phenomenon of the Imperial Era focuses on strategies of involving the viewer in the pictorial narrative and thus reinforcing the immersive power of sculpture. Finally, it discusses the intentional creation of voids within the image, as observed in incomplete copies, in the larger context of the visual culture of the Imperial Era, notably through a parallel with the theatrical medium of pantomime.
APA, Harvard, Vancouver, ISO, and other styles
10

Burrell, Darrell Norman, Aikyna Finch, Janet Simmons, and Sharon L. Burton. "The Innovation and Promise of STEM-Oriented Cybersecurity Charter Schools in Urban Minority Communities in the United States as a Tool to Create a Critical Business Workforce." In New Threats and Countermeasures in Digital Crime and Cyber Terrorism. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-8345-7.ch015.

Full text
Abstract:
This text is an on-going study to provide current information regarding developing underrepresented student populations through STEM specific Charter schools to fulfill pipeline shortages. Current findings show that African Americans are underrepresented in high paying Science, Technology, Engineering, and Mathematics (STEM) fields, especially in cybersecurity. The U.S. pipeline of minority students studying STEM falls short in producing the next generation of cybersecurity professionals; thus, a salient need exists to design, pilot, and test a program to grow the minority student pipeline in the cybersecurity field. The charter school movement is one of the fastest growing education reforms with the ability to make a dramatic impact in the U.S. and internationally. Because charter schools often organize around a mission, theme, or curricular and enjoy freedoms, in organizational structure, mission, and academic program, with all held to high standards, this text proposes cybersecurity charter schools to fill technology voids. This organizational structure, mission, and academic programming, will enable students to become immersed in hands-on, real world applications allowing for experiential learning, which can develop students with cybersecurity expertise, technical knowledge, and skills, and competencies needed to take and pass cybersecurity and information security related certification assessments.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Voids related to solidification"

1

Sedeh, Mahmoud Moeini, and J. M. Khodadadi. "Effect of Voids on Solidification of Phase Change Materials Infiltrated in Graphite Foams." In ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ht2012-58405.

Full text
Abstract:
As a fundamental process during production of composite thermal energy storage systems, infiltration of phase change materials (PCM) leads to formation of voids (air pockets) inside the pores of graphite foams. The presence of voids inside graphite cells (i.e. the presence of air pockets next to the conductive walls of the porous structure) markedly affects the thermal and phase change behavior of the composite. Therefore, it is vitally important to investigate the effect of voids on phase change behavior of latent heat energy storage composites. In complementing recent work devoted to modelin
APA, Harvard, Vancouver, ISO, and other styles
2

Cates, Michael. "Stress-induced solidification in colloidal suspensions." In International conference on Statistical Mechanics of Plasticity and Related Instabilities. Sissa Medialab, 2006. http://dx.doi.org/10.22323/1.023.0045.

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

Moeini Sedeh, Mahmoud, and J. M. Khodadadi. "Effect of Marangoni Convection on Solidification of Phase Change Materials Infiltrated in Porous Media in Presence of Voids." In ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/ht2013-17316.

Full text
Abstract:
Void formation is encountered in the form of air pockets during preparation of composite thermal energy storage systems, consisting of phase change materials (PCM) infiltrated into a high-conductivity porous structure. The presence of voids within the pores of a porous structure degrades the thermal and phase change behavior of such composites. Recent work devoted to multiphase modeling of the infiltration of PCM in liquid state into porous media and formation of voids showed that among the various contributing driving forces (i.e. gravity, pressure gradient and interfacial forces), the interf
APA, Harvard, Vancouver, ISO, and other styles
4

Crepeau, John C., and Ali Siahpush. "Effects of Internal Heat Generation on Solidification." 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/ht2005-72079.

Full text
Abstract:
We present solutions for solid-liquid phase change in materials that generate internal heat. This problem is solved for both cylindrical and semi-infinite geometries. The analysis assumes a temperature profile in the solid phase and constant temperature boundary conditions on the exposed surfaces. We derive differential equations governing the solidification thickness for both geometries as functions of the Stefan number and the internal heat generation (IHG). For the cylindrical geometry, the solidification layer obtains a steady-state value which is related to the inverse of the square root
APA, Harvard, Vancouver, ISO, and other styles
5

Estrada, Herb, and Ernest M. Hauser. "A Simple and Reliable System for Detecting and Measuring Gas Voids in Safety-Related Fluid Systems." In 17th International Conference on Nuclear Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/icone17-75756.

Full text
Abstract:
Over the past 20 years there have a number of instances where nuclear power plant operators have discovered gas voids—typically air but occasionally other gases such as undissolved hydrogen—in fluid systems whose function is important to reactor safety. These systems have included emergency core cooling systems, decay heat removal systems, and containment spray systems. The amount of gas has, in some cases, been sufficient to call into question the operability of the systems; had they been needed. The automatic initiation of a system with a gas void present may lead to gas binding of its pumps
APA, Harvard, Vancouver, ISO, and other styles
6

Vu, Truong V., Gretar Tryggvason, Shunji Homma, John C. Wells, and Hideyuki Takakura. "Numerical Investigations of Drop Solidification by a Front-Tracking Method." In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21899.

Full text
Abstract:
We present a front-tracking/finite difference method for simulation of drop solidification, where the melt is confined by its own surface tension. The problem includes temporal evolution of three interfaces, i.e. solid–liquid, solid–air, and liquid–air, that are explicitly tracked under the assumption of axisymmetry. The solid–liquid interface is propagated with a normal velocity that is calculated from the normal temperature gradient across the front and the latent heat. The liquid–air front is advected by the velocity interpolated from nearest bulk fluid flow velocities. Method validation is
APA, Harvard, Vancouver, ISO, and other styles
7

Zhou, J., H. L. Tsai, and P. C. Wang. "Transport Phenomena and Defect Formation in Laser Welding of Zinc-Coated Steels." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59286.

Full text
Abstract:
Zinc-coated steels are used extensively in the auto industry because they are inexpensive, durable and have high corrosion resistance. Lasers are being used to weld zinc-coated steels due to high welding speed, small seam and narrow heat affected zone. However, it is difficult to laser weld lap-joint zinc-coated steel sheets under a very small gap condition between the metal interfaces since there is a considerable amount of zinc vapor generated. This vapor must be vented out; otherwise it will be trapped in the weld pool leading to different welding defects, such as large voids at the tip of
APA, Harvard, Vancouver, ISO, and other styles
8

Askari, Farbod, Leila Jannesari Ladani, Abhijit Dasgupta, Matti Rahko, and Jussi Sarkka. "Effect of Design Variables on Voids and Thermal Performance of QFN Packages." In ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ht2007-32067.

Full text
Abstract:
The objective of this study is to empirically investigate the dependence of solder voids and related interconnect defects in QFN packages, on such design variables as stencil aperture pattern and size, as well as quantity and location of thermal vias. A non-traditional fractional-factorial matrix was used for this study. The QFN packages produced by implementing this experiment were analyzed using destructive and nondestructive failure analysis techniques. The effect of design variables on different types of defects such as voids, and taper were evaluated. This study showed that stencil apertu
APA, Harvard, Vancouver, ISO, and other styles
9

Siahpush, Ali, and John Crepeau. "Integral Solutions of Phase Change With Internal Heat Generation." In 12th International Conference on Nuclear Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/icone12-49412.

Full text
Abstract:
This paper presents solutions to a one-dimensional solid-liquid phase change problem using the integral method for a semi-infinite material that generates internal heat. The analysis assumed a quadratic temperature profile and a constant temperature boundary condition on the exposed surface. We derived a differential equation for the solidification thickness as a function of the internal heat generation (IHG) and the Stefan number, which includes the temperature of the boundary. Plots of the numerical solutions for various values of the IHG and Stefan number show the time-dependant behavior of
APA, Harvard, Vancouver, ISO, and other styles
10

Kowalska, Danuta, Paweł Iwanowski, and Agata Kowalewska. "Determination of Parametres of the Air-Void System in Airfield Pavement Concrete Using Computed Tomography." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.108.

Full text
Abstract:
Immediately after completion airfield pavements begin a gradual deterioration that is attribute to several factors. One of the major elements contribute to airfield pavement deterioration is exposure to the environment (freezingthawing and de-icing salts). Air-voids microstructure in cement-based materials is an important feature related to the freeze-thaw durability of these materials since all the adverse influences are result of potentially harmful ionic fluids and aggressive gas transport through the concrete and the transport properties strongly depend on the morphology of the pores insid
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Voids related to solidification"

1

Lee, Jusang, John E. Haddock, Dario D. Batioja Alvarez, and Reyhaneh Rahbar Rastegar. Quality Control and Quality Assurance of Asphalt Mixtures Using Laboratory Rutting and Cracking Tests. Purdue University, 2019. http://dx.doi.org/10.5703/1288284317087.

Full text
Abstract:
The main objectives of this project were to review the available balanced-mix design (BMD) methodologies, understand the I-FIT and Hamburg Wheel Tracking Test (HWTT) test methods using INDOT asphalt mixtures, and to explore the application of these tests to both a BMD approach and as performance-related Quality Control (QC) and Quality Acceptance (QA) methods. Two QA mixture specimen types, plant-mixed laboratory-compacted (PMLC) and plant-mixed field-compacted (PMFC) were used in the determination of cracking and rutting parameters. Distribution functions for the flexibility index (FI) values
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