Thèses sur le sujet « Expansion de la vapeur »
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Semeraro, Emanuele. « Experimental investigation on hydrodynamic phenomena associated with a sudden gas expansion in a narrow channel ». Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066516/document.
Texte intégralThe sharp vaporization of superheated liquid sodium is investigated. It is suspected to be at the origin of the automatic shutdown for negative reactivity, occurred in the Phénix reactor at the end of the eighties.An experimental apparatus has been designed and operated to reproduce the expansion of overpressurized air, superposed to water in a narrow vertical rectangular section channel.When expansion begins, the initial flat interface separating the two fluids becomes corrugated under the development of two-dimensional Rayleigh-Taylor instabilities. The interface area increases significantly and becomes even 50 times larger than the initial value. Since the channel is very narrow, instabilities along the channel depth do not develop.The gas expansion in a narrow channel can be divided into two main phases: Rayleigh-Taylor (linear and non-linear) and multi-structures (transition and chaotic) phases. The former is characterized by the dynamic of corrugated profile and the interface area results proportional to the amplitude of corrugation The latter is influenced by the behavior of the liquid structures dispersed in gas matrix and the interface area is mainly proportional to the number of liquid structures.The distribution of volume fraction suggests a model of channel flow consisting of three regions: the regular profile of peaks, the spike region and the structures tails. The analysis of sensibility to surface tension confirms that, with a lower surface tension, the fluids configuration is more unstable. The interface corrugations are more pronounced and more structures are produced, leading to a higher increment of the interface area
Poullain, Thomas. « Etude numérique et expérimentale de l’évaporation sous vide d’alliages métalliques : application à la refusion VAR de Zircaloy-4 ». Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0189.
Texte intégralComposition and chemical segregation control is primordial when producing high value-added materials, such as zirconium alloys for nuclear industry. Vacuum processing allows production very high purity ingot, however it also presents an additional problematic concerning control and prediction of alloy elements evaporation. This PhD dissertation aims at improving prediction of volatile metallic species evaporation during vacuum elaboration, especially during Zircaloy 4 VAR (Vacuum Arc Remelting).First, the evaporation kinetics and the expansion of the metal vapour produced during vacuum melting is investigated. The study is done with a combination of volatilisation experiments using an experimental electron beam furnace and particle based numerical simulation (FPM) of vapour behaviour. Our volatilisation studies on pure metals, Ti and Zr, show the importance of collisions above the liquid on the vapour expansion and its recondensation. Determination of Fe and Sn vapour expansion during Zy4 vacuum melting combined with particle simulation, allowed us to determine thermodynamic activity coefficients values for these elements in liquid Zy4.Then, metallic vapour expansion under VAR conditions is studied, with particular interest shown to condensation flows on the different surfaces. Application of our numerical model to Zy4 shows that the vapour deposited on the mould has a very different composition compared to the alloy. Finally, the particle model is coupled to an ingot growth model and we study the influence of evaporation, condensation and crown reincorporation with regard to volatile solute segregation and depletion. This coupling also provides a first prediction of crown thickness and composition and we compare them to industrial crown samples
Hwang, Moonkyu. « Numerical modeling of the expansion phase of vapor explosions ». Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/16761.
Texte intégralSuardin, Jaffee Arizon. « The application of expansion foam on liquefied natural gas (LNG) to suppress LNG vapor and LNG pool fire thermal radiation ». [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2906.
Texte intégralSouza, Rafaela Faciola Coelho de. « Estudo da influência da sucção na pressão de expansão de materiais argilosos com a técnica da transferência de vapor ». Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-19102015-105616/.
Texte intégralThis thesis presents the quantification and characterization of expansion, especially the influence of suction on samples of sedimentary materials from Corumbatai Formation that occurs in Sao Paulo. Undisturbed and compacted samples with different moisture contents were tested with swelling pressure tests at constant volume method by flooding, and also with suction control by vapour transfer technique. Compacted mixtures of this material with bentonite in differents proportions, and mixtures of bentonite with sandy non-expansive material from the Botucatu Formation were also tested. The suction control was performed by the use of NaCl salt solutions at concentrations prepared to perform 40,000, 25,000, 10,000 and 5,000 kPa suctions. For the tests, it was developed a system for load application and automatic retrieval of pressure. To accelerate the wetting process by vapour, we used an external reservoir connected to an air pump adapted to promote air circulation inside the edometric cell, specially made for this study. The expansion results in flooding tests showed increasing swelling pressure with decreasing moisture content. Consequently there was an increase in the initial suction of the tested samples, which kept increasing as the rate of bentonite was raised in the mixtures, with a peak of ca. 700 kPa for the test with dry pure bentonite compacted. In the microstructure analysis of the samples by mercury intrusion porosimetry, the samples showed variation only in macropores after swell; and the ones compacted at optimum moisture, and subsequently air dried, showed no significant change after the swell. In scanning electron microscopy (SEM) it was possible to verify the change in the voids of the samples, as well as to visualize the variation in the structure and texture. In addition, the SEM confirmed clay minerals deterninated in mineralogical characterization. The results of controlled suction with swell tests showed absence of swell pressure for Corumbatai samples tested in undisturbed conditions, and compacted condition at optimum moisture content, and then air dried. However, when compacted in the form of dry powder, as well as when compacted dry, mixed with different proportions of bentonite, this material showed swelling pressures with vapor transfer technique, as well as mixtures of bentonite with non-expansive material of Botucatu Formation. The absence of swell was explained by the slow damping provided by the vapor transfer that although promoting increasing dampen, did not sufficiently mobilized volume variation capable of transmitting blowing pressure. Therefore, the swell tests with the vapor transfer technique were effective to evaluate the swelling just in cases where clay minerals with swell potential were present in significant proportions.
Denèfle, Romain. « Modélisation locale diphasique eau-vapeur des écoulements dans les générateurs de vapeur ». Phd thesis, Bordeaux 1, 2013. http://tel.archives-ouvertes.fr/tel-00919838.
Texte intégralAkraiam, Atea I. Bubaker. « Metal cluster production by condensation of metal vapour in supersonic expansions and by aggregation in droplets ». Thesis, University of Leicester, 2015. http://hdl.handle.net/2381/31834.
Texte intégralBlondel, Frédéric. « Couplages instationnaires de la vapeur humide dans les écoulements de turbines à vapeur ». Phd thesis, Ecole Centrale de Lyon, 2014. http://tel.archives-ouvertes.fr/tel-00985725.
Texte intégralTillberg, Paul W. « Expansion microscopy : improving imaging through uniform tissue expansion ». Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106094.
Texte intégralCataloged from PDF version of thesis.
Includes bibliographical references (pages 70-76).
Until the past decade, optical microscopy of biological specimens was strongly limited by diffraction and scattering, affecting imaging resolution and depth, respectively. Now, numerous methods are available to overcome each of these limitations, but sub-diffraction limited resolution imaging over large volumes of scattering tissue is still a challenge. This work concerns the development of a new method, Expansion Microscopy (ExM) for achieving effect sub-diffraction-limited optical images in biological specimens. In ExM, the specimen is embedded in a swellable gel material to which fluorescent probes are chemically anchored. The embedded tissue is strongly digested so that it will not hinder uniform expansion driven by the gel. The gel with embedded, fragmented tissue is washed in water, triggering expansion of around 4-fold in each dimension. A variant of the method, ExM with Protein Retention (proExM) is presented that allows proteins themselves, rather than fluorescent probes, to be anchored by a small molecule cross-linker to the gel, so that the method may be carried out entirely with commercial components and standard antibodies.
by Paul W. Tillberg.
Ph. D.
Hansen, Glenn Alexander. « TWO ULTRAPRECISE THERMAL EXPANSION INVESTIGATIONS : SODIUM SILICATE - A LOW-EXPANSION CEMENT, AND THERMAL EXPANSION UNIFORMITY OF ZERODUR ». Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/291814.
Texte intégralPerrin, Mathias. « Instabilités optiques dans une vapeur atomique ». Nice, 2003. http://www.theses.fr/2003NICE4072.
Texte intégralBillerbeck, Bodo, et bodob@cs rmit edu au. « Efficient Query Expansion ». RMIT University. Computer Science and Information Technology, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20060825.154852.
Texte intégralRobertson, Jonté. « LAX Expansion Study ». Digital Commons at Loyola Marymount University and Loyola Law School, 2012. https://digitalcommons.lmu.edu/etd/328.
Texte intégralNjoya, Nadine Katia. « Contraction-Expansion Protocols ». Digital Commons @ East Tennessee State University, 2008. https://dc.etsu.edu/etd/1971.
Texte intégralBrooks, S. R. « Aluminium expansion processing / ». Title page, contents and summary only, 1990. http://web4.library.adelaide.edu.au/theses/09ENS/09ensb873.pdf.
Texte intégralDo-deLatour, Thuy B. « Effective maxillary protraction hyrax expansion appliance vs. double-hinged expansion appliance / ». Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10287.
Texte intégralTitle from document title page. Document formatted into pages; contains viii, 99 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 83-90).
Ariza, Rocha Oscar David. « Dynamic transformers rating for expansion of expansion of existing wind farms ». Thesis, KTH, Elektroteknisk teori och konstruktion, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-256531.
Texte intégralEldistributionsnätet står inför en utmaning att snabbt ansluta användare till nätet och en möjlighet att miska kostnaderna i nya ansultnigar. En metod för att förbättra nätverksdrift och planering är dynamisk lastbarhet hos transformatorer, eller dynamic transformer rating (DTR). Metoden beaktar belastings- och temperaturvariationer för att öka transformatorns lastbarhet samtidigt som den upprätthåller säker drift. Detta projekt undersöker tillämpningen av dynamisk lastbarhet till en befintling population av transformatorer kopplade till en vindkraftpark och föreslår en metod för att ansluta ytterligare turbiner till nätet med hjälp av befintliga transformatorer. Fem transformatorplatser och nio enheter som tillhör E.ON AB används för att undersöka potentialen för DTR inom tillämpningar för nätverksexpansion. En vänderanalysis avslöhar att både höga vindhastigheter och temperaturer sällan uppstår samtidigt. En uppskattning av åldrandet baserad på IEC 60076-7-standarden visar att transformatorer för vindkraftstillämpningar är underanvända. Med avseende på den termisk transformatormodellen visar en känslighetsanalys att parametrarna som påverkar minskning av livslängden mest är fuktinnehållet, hot spot-faktorn och ökning av top-olja-temperaturen. Den maximala belastningen för att säkerställa en åldring under 50 år beräknas för varje transformator, för olika värden på den maximala hotspottemperaturen. Detta visar att med ökning av den maximala tillåtna temperaturen minskar produktionsbortfall och ökar åldrandet. En-nods-analys visar den optimala expansionen av vindkraft från en producents perspektiv, och en nätverksanalys introducerar ytterligare begränsningar för nätverket. Detta resulterar i en optimal ökningsfaktor på cirka 30-50% och är större för högre värden på den maximala hotspottemperaturen. Noggranna vädermätningar och transformatorparametrar är nödvändiga för att göra en korrekt uppskattning av transformatorns åldrande. Att använda fiberoptiska temperatursensorer i nya transformatorer och platsspecifika temperaturmätningar kan öka transformatorns lastbarhet. En maximal tillåten temperatur på 110 ◦C är för konservativ och begränsar transformatorns potential för vindkraftstillämpningar. Samhället drar fördel av DTR i vindkraftstillämpningar eftersom det leder till en effektivare resursanvändning och att ytterligare förnybar energi kan introduceras i nätverket.
Giza, Jacek. « Etude de la cinétique et des équilibres liquide-vapeur et liquide-liquide-vapeur dans l'hydrolyse d'un ester lourd ». Toulouse, INPT, 1990. http://www.theses.fr/1990INPT021G.
Texte intégralMalaurie, Agnès. « Modélisation des mécanismes de transport de la vapeur métallique dans les techniques de dépôt physique en phase vapeur ». Limoges, 1995. http://www.theses.fr/1995LIMO0023.
Texte intégralPayen, Jacques. « Technologie de l'énergie vapeur en France dans la première moitié du XIXe siècle : la machine à vapeur fixe / ». Paris : CTHS, 1985. http://catalogue.bnf.fr/ark:/12148/cb34777328g.
Texte intégralAllemand, Nadine. « Mesure des pressions de vapeur d'hydrocarbures lourds ». Lyon 1, 1985. http://www.theses.fr/1985LYO19065.
Texte intégralVerneau, Philippe. « Captation rapide et modélisation d'équilibres liquide-vapeur ». Lyon 1, 1992. http://www.theses.fr/1992LYO10162.
Texte intégralRuhemann, Patrick. « Vapeur motrice et industrie au XIXe siècle ». Paris 10, 2007. http://www.theses.fr/2007PA100079.
Texte intégralThe steam machine is a typical icon of the Industrial Revolution which transformed western societies from the end of the eighteenth century. If many studies about these equipments exist in history of techniques, this one highlights relationships between steam power and industry. We will privilege its development at different scales, national and departmental, and its integration into most of the industrial factories. France is the exclusive subject of this analysis that mainly spreads out from 1830 to the Great War. The real weight of steam power in the industry is also measured through its relations, often more additional than competitive, wit other modes of production of driving strength, especially hydraulic energy but without neglecting windmills and animal drive. At last, the eventuality that steam power appears mainly like supporting watermills during the First Industrial Revolution is formally questioned
Vandewalle, Pierre. « Analyse du fonctionnement d'un conditionneur à vapeur ». Bordeaux 1, 1999. http://www.theses.fr/1999BOR10661.
Texte intégralBriaudeau, Stephan. « Spectroscopie à haute résolution en vapeur confinée ». Paris 13, 1998. http://www.theses.fr/1998PA132010.
Texte intégralChapates, David Carl. « Optimal airfield capacity expansion ». Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA303865.
Texte intégral"September 1995." Thesis advisor(s): Siriphong Lawphongpanich. Includes bibliographical references. Also available online.
Miller, Wayne. « Negative Thermal Expansion Materials ». Thesis, University of Exeter, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.531676.
Texte intégralSham, Chun-wai Sammy, et 岑振威. « Towards legitimate housing expansion ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31986791.
Texte intégralLanfear, T. A. « Algorithms for network expansion ». Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37754.
Texte intégralStaden, Katherine. « Robust expansion and Hamiltonicity ». Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5981/.
Texte intégralJaritz, Fritz Simon. « Single Cell Expansion Microscopy ». Thesis, KTH, Tillämpad fysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279445.
Texte intégralBrowne, J. A. « Multiple expansion refrigeration cycles ». Master's thesis, University of Cape Town, 1986. http://hdl.handle.net/11427/23793.
Texte intégralSham, Chun-wai Sammy. « Towards legitimate housing expansion ». Hong Kong : University of Hong Kong, 2002. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25948787.
Texte intégralSCOLA, GIUSEPPE. « Applications of Cluster Expansion ». Doctoral thesis, Gran Sasso Science Institute, 2021. http://hdl.handle.net/20.500.12571/21994.
Texte intégralCOURTOIS-DUPLESSY, ELISABETH, et MARCANT BRIGITTE TIBERGHIEN. « Expansion tissulaire : experience lilloise ». Lille 2, 1991. http://www.theses.fr/1991LIL2M123.
Texte intégralPrado, Afonso Josiana. « Volants thermiques cryogéniques liquide vapeur pour applications spatiales ». Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00981957.
Texte intégralṬāha, ʿUṯmān. « Commande automatique robustesse du générateur de vapeur REP ». Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL1280.
Texte intégralPicchi, Stéphane. « Modélisation de l'explosion de vapeur en géométrie stratifiée ». Université Joseph Fourier (Grenoble), 1999. http://www.theses.fr/1999GRE10104.
Texte intégralBrayer, Claude. « Modélisation de l'explosion de vapeur en géométrie stratifiée ». Grenoble 1, 1994. http://www.theses.fr/1994GRE10038.
Texte intégralHeyraud, Jean-Claude. « Forme d'équilibre de cristaux métalliques équilibre cristal-vapeur / ». Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37605908t.
Texte intégralHeyraud, Jean-Claude. « Forme d'équilibre de cristaux métalliques (équilibre cristal-vapeur) ». Aix-Marseille 3, 1987. http://www.theses.fr/1987AIX30032.
Texte intégralPehrsson, Tobias, et Daniel Svanberg. « Expansion, strategi och kunskap : En studie av svenska tillverkande företags lokala expansion i USA ». Thesis, Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-23670.
Texte intégralEkberg-Selander, Karin, et Johanna Enberg. « Query Expansion : en jämförande studie av Automatisk Query Expansion med och utan relevans-feedback ». Thesis, Högskolan i Borås, Institutionen Biblioteks- och informationsvetenskap / Bibliotekshögskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-18416.
Texte intégralUppsatsnivå: D
Nardetto, Lucia. « The haematoma expansion paradoxes. A study of haematoma expansion in acute primary intracerebral haemorrhage ». Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3422798.
Texte intégralIntroduction: intracerebral haemorrhage (ICH) accounts for approximately 10-15% of all new strokes that occur each year, but results in disproportionately high morbidity and mortality. Outcome has not improved significantly in recent decades due to the lack of clear beneficial medical or surgical therapies. One of the four factors thought to be responsible for the praecox clinical and radiological deterioration of ICH patients is haematoma expansion (HE). Aims of our study were to analyze the haematoma expansion phenomenon, any risk factors and its influence on outcome, and to evaluate ICH patient characteristics, investigating elements that could contribute to determining ICH outcome. Methods: we conducted an observational longitudinal study on retrospectively collected data on 206 consecutive patients with primary or anticoagulant-associated ICH admitted to the Stroke Units of the Neurology Units of Treviso Hospital and St. Anthony's Hospital of Padova, from January 2011 to December 2015. Patients with a secondary cause of ICH were excluded. We recorded baseline history, radiological, laboratory and clinical admission data, and follow-up information. Results: our ICH population was characterized by elderly Caucasian patients with a slight prevalence of males, small haematoma volumes and mild-moderate clinical severity. While male patients seemed to have a higher incidence of ICH, at a younger age, with a different vascular risk-factor profile and a higher risk of haematoma expansion, outcome was not poorer than in female patients. Of our population, 28.6% presented significant HE and the risk factors for HE proved to be male sex and higher NIHSS score. At follow up, mortality was 24.7% at three months and 28.4% at one year; based on the mRS, the average patient was dependent at three months. At follow up, there was a slightly higher percentage of ICH relapses than of ischemic strokes. Age, haemorrhage characteristics, as baseline volume and ventricular invasion, haematoma expansion and clinical severity are the strongest predictors of outcome. Conclusions and Discussion: the analysis has confirmed the complexity of the haematoma expansion phenomenon, which still remains partially unknown. Our findings have yielded several paradoxes and we wonder whether haematoma expansion can be truly considered a prognostic factor or represents one step in the natural history of every ICH. Considering the natural history of ICH patients, none of the identified prognostic factors is modifiable at the time of medical evaluation. ICH pathology and the haematoma expansion phenomenon are still not sufficiently understood and more studies are warranted to positively influence the prognosis of these patients.
Cheang, Chan Wa. « Web query expansion by WordNet ». Thesis, University of Macau, 2005. http://umaclib3.umac.mo/record=b1445899.
Texte intégralAlpinar, Zumrut. « Expansion Of Rawls' ». Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610836/index.pdf.
Texte intégralexpansion of Rawls'
theory of Justice as Fairness to health care by considering individual responsibility in maintaining and restoring health. The thesis also considers transplantation as a special case and develops a Rawlsian model for transplantation.
Van, Oudtshoorn Clive Niel. « Elements in global hospitality expansion ». Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1019970.
Texte intégralFamy, Charlotte. « Expansion of heat-cured mortars ». Thesis, Imperial College London, 1999. http://hdl.handle.net/10044/1/8494.
Texte intégralAuoja, Anton. « Procedural Expansion of Urban Environments ». Thesis, Linköpings universitet, Institutionen för systemteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-71268.
Texte intégralRussell, Adrian Robert Civil & Environmental Engineering Faculty of Engineering UNSW. « Cavity expansion in unsaturated soils ». Awarded by:University of New South Wales. School of Civil and Environmental Engineering, 2004. http://handle.unsw.edu.au/1959.4/22263.
Texte intégral