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Dissertations / Theses on the topic 'Microgravity experiment'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

Brisset, Julie [Verfasser], and Jürgen [Akademischer Betreuer] Blum. "A Microgravity Sounding-Rocket Experiment on Protoplanetary Dust Aggregation / Julie Brisset ; Betreuer: Jürgen Blum." Braunschweig : Technische Universität Braunschweig, 2014. http://d-nb.info/1175821403/34.

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2

Dalmon, Alexis. "Simulation numérique du ballottement d'ergol et modélisation de l'interaction fluides-membrane dans un réservoir de satellite." Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30256/document.

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Le ballottement dans les réservoirs d'ergols est une des perturbations les plus importantes de la stabilité d'un satellite en orbite. En considérant des manœuvres faiblement inertielles, il n'existe pas de modèle analytique et l'expérimentation nécessite de longues périodes de temps en micro-gravité. Nous nous proposons donc, dans cette thèse, de réaliser des simulations numériques de ce phénomène. L'étude est basée sur le solveur DIVA résolvant les équations de Navier-Stokes diphasiques avec les méthodes level-set et Ghost Fluid. Deux technologies de réservoirs sont à l'étude : les réservoirs

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3

Endo, Makoto. "Numerical modeling of flame spread over spherical solid fuel under low speed flow in microgravity:Model development and comparison to space flight experiments." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1461022358.

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4

Grzeschik, Christoph. "Experiments with Bose-Einstein Condensates in Microgravity." Doctoral thesis, Humboldt-Universität zu Berlin, 2017. http://dx.doi.org/10.18452/18037.

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Atominterferometer erlauben es, Beschleunigungen mit bisher nicht erreichter Präzision zu messen. Anwendungen in der Grundlagenforschung beinhalten Gravitationswellendetektoren, die Bestimmung von Naturkonstanten oder Tests des schwachen Äquivalenzprinzips. Die Sensitivität eines Sensors für Tests des schwachen Äquivalenzprinzips skaliert quadratisch mit der Zeit der freien Entwicklung der Atome während der Interferometersequenz. Durch die Verwendung von Bose-Einstein-Kondensaten mit stark reduzierter Ausdehnungsgeschwindigkeit sowie dem Betrieb in Schwerelosigkeit kann die Sensitivität um Grö

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5

LI, YANJUN. "Flame Spread in Confined Spaces: Microgravity Experiments and Numerical Simulations." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1623863431539671.

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6

Fordyce, Jess E. "An experimental protocol for the evaluation of graphic input devices in microgravity." Thesis, Massachusetts Institute of Technology, 1986. http://hdl.handle.net/1721.1/83659.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1986.<br>Microfiche copy available in Archives and Barker.<br>Bibliography: leaves 213-215.<br>by Jess E. Fordyce.<br>M.S.

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7

Li, Chengyao. "Material Flammability and Burning Behavior of Thin Solids in Concurrent Forced Flow in Microgravity: A Numerical Study in Support of Large Scale Microgravity Burning Experiments." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1567789218704858.

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8

Bitlloch, Puigvert Pau. "Turbulent bubble suspensions and crystal growth in microgravity. Drop tower experiments and numerical simulations." Doctoral thesis, Universitat de Barcelona, 2012. http://hdl.handle.net/10803/96295.

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We study the formation and spreading of a turbulent jet of bubbles in microgravity. This has been analyzed from the recordings obtained in previous experimental campaigns of microgravity. Results have been compared with a simplified model of passive bubbles, in which bubbles are advected by the mean flow and dispersed due to the local degree of turbulence at each point of the jet. Thanks to the expertise obtained with this part of the thesis, we have designed and built a new experiment that has been used 36 times in the 4.7 s drop tower of ZARM (“Center of Applied Space Technology and Microgra

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9

Leroy, Axelle. "Contribution à l'analyse des signaux cérébraux liés à la navigation virtuelle en microgravité." Doctoral thesis, Universite Libre de Bruxelles, 2006. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210745.

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10

Tognella, Frederic. "Développement de méthodes pour la quantification de l'évolution des propriétés mécaniques des muscles humains en microgravité." Compiègne, 1994. http://www.theses.fr/1994COMPD679.

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L'atrophie fonctionnelle des muscles humains lors des séjours en microgravité, pose le double problème de sa compréhension, de sa prévention. Les muscles des membres inferieurs, surtout sur le triceps sural, du fait de sa fonction posturale, sont atteints. Les contre-mesures actuelles ne se sont pas pleinement efficaces. Les connaissances les plus précises sont acquises sur le rat ou l'on constate que l'atrophie, s'accompagne de modifications des propriétés contractiles et viscoélastiques. On se propose donc de mettre en place des protocoles non-invasifs d'étude sur les muscles de la cheville

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11

Grzeschik, Christoph [Verfasser], Achim [Gutachter] Peters, Kai [Gutachter] Bongs, and Heinz-Wilhelm [Gutachter] Hübers. "Experiments with Bose-Einstein Condensates in Microgravity / Christoph Grzeschik ; Gutachter: Achim Peters, Kai Bongs, Heinz-Wilhelm Hübers." Berlin : Humboldt-Universität zu Berlin, 2017. http://d-nb.info/1189328844/34.

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12

Jurado, Cruz Rafael. "Numerical simulations of the DCMIX microgravity thermodiffusion experiments to assess the impact of typical International Space Station reboosting manoeuvres." Doctoral thesis, Universitat Rovira i Virgili, 2019. http://hdl.handle.net/10803/667154.

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En aquesta tesi s'ha analitzat l'impacte que les maniobres vehiculars impulsives (reboostings) de l'Estació Espacial Internacional (ISS) tenen sobre els experiments de la sèrie DCMIX. En primer lloc, l'entorn microgravitatorio de la ISS ha estat analitzat utilitzant els senyals enregistrats per sensors situats en diferents mòduls de l'estació. Aquesta anàlisi ha permet determinar que el límit de vibració establert no es compleix permanentment, especialment durant els episodis de fortes pertorbacions com els reboostings. Aquestes maniobres aconsegueixen crear el major nivell d'acceleració mesur

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13

Tzevelecos, Wassilis. "Contribution to Heat and Mass Transfer for Space Experiments." Doctoral thesis, Universite Libre de Bruxelles, 2018. https://dipot.ulb.ac.be/dspace/bitstream/2013/269864/6/contratWT.pdf.

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This manuscript has been realized in the frame of SELENE experiment research activities. SELENE is the ac-ronym of Self-rewetting fluids for ENErgy management and consists of a space project aiming to investigate heat and mass transfer phenomena in mono-groove configuration with self-rewetting fluids (SRFs). Self-rewetting fluids are mixture showing an anomalous trend of surface tension with temperature, an inversion of the surface tension slope after certain temperature. As consequence, when the minimum in surface ten-sion is crossed, surface tension gradient at the meniscus interface pulls t

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14

Schiemangk, Max. "Ein Lasersystem für Experimente mit Quantengasen unter Schwerelosigkeit." Doctoral thesis, Humboldt-Universität zu Berlin, 2019. http://dx.doi.org/10.18452/19826.

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Bereits Galilei untersuchte, ob verschiedene frei fallende Körper im Schwerefeld der Erde gleich stark beschleunigt werden, die sogenannte Universalität des freien Falls. Die Genauigkeit der experimentellen Überprüfungen konnte seitdem beständig gesteigert werden. Einen neuen Ansatz, die Messgenauigkeit noch weiter zu verbessern, bilden quantenmechanische Messmethoden, die auf Materiewelleninterferometrie beruhen. Die dabei genutzten Apparaturen verwenden Laserstrahlung zur Kühlung, Manipulation und Detektion der Atome. Ziel der vorliegenden Arbeit war die Entwicklung des Lasersystems für ein

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15

Johnston, Michael C. "Growth and Extinction Limits: Ground Based Testing of Solid Fuel Combustion in Low Stretch Conditions in Support of Space Flight Experiments." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1511915506999995.

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16

Elston, Levi J. "The Effect of Variable Gravity on the Cooling Performance of a 16-Nozzle Spray Array." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1221228402.

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17

Hartwig, Jason W. "Liquid Acquisition Devices for Advanced In-Space Cryogenic Propulsion Systems." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1396562473.

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18

Köhler, Werner, Thomas Triller, Marcel Schraml, and Matthias Gebhardt. "Non-isothermal diffusion in ternary systems: ground and microgravity experiments." 2017. https://ul.qucosa.de/id/qucosa%3A31733.

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19

Chen, Chien-Pei, and 陳建培. "An Experimental Study on the Combustion of Binary-Fuel Droplets under Microgravity Conditions." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/67670764374778126527.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>96<br>Making use of freely falling in the experiment generates microgravity conditions, which can provide an environment for the droplets combustion without the convection, and enables us to the observe characteristics of combustion. The single-component fuels used in this experiment were biodiesel, diesel, dodecane, hexadecane, ethanol and dodecanol, the droplets of binary fuel mixtures include ethanol/biodiesel, dodecanol/biodiesel and dodecane/biodiesel. The experimental results showed that the burning rate would decrease with increasing the initial droplet dia

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20

Nguyen, Ngoc Thanh. "Analytical and Experimental Study of Annular Two-Phase Flow Friction Pressure Drop Under Microgravity." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7493.

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Two-phase liquid-gas flow has a wide variety of applications in space, including active thermal control systems, high-power communications satellites, heat pumps and space nuclear reactors. Two-phase systems have many potential advantages over current single-phase systems due to reductions in system size, weight and power consumption. The mechanisms of pressure drop, heat transfer coefficients, void fractions, and flow regimes must be well understood under microgravity conditions in order to design reliable two-phase systems. The main objective of this present research is to develop a new math

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21

Simic-Stefani, Sanja. "Numerical and experimental investigation of solid particle motion in a fluid cell under microgravity." 2005. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=232709&T=F.

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22

Hassan, Samer. "Experimental and theoretical studies of vibration-induced particle motion on Earth and in microgravity." 2005. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=370896&T=F.

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23

Wang, Guoqing. "Laser beam welding of AISI 316 stainless steel in microgravity environment : experiments aboard a KC-135 flight." 1993. http://hdl.handle.net/1993/9736.

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24

Godfrey, Brian Michael. "EXPERIMENTAL RESULTS FOR VISCOSITY MEASUREMENTS PERFORMED ON THE INTERNATIONAL SPACE STATION USING DROP COALESCENCE IN MICROGRAVITY." 2011. http://trace.tennessee.edu/utk_gradthes/972.

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Current commonly use viscosity measurement techniques cannot be used for all types of fluids. For fluids in the under cooled region a new method of measuring the viscosity is required. A process of viscosity measurement, by measuring the speed of droplet coalescence in a microgravity environment, was developed. This paper analyses validation experiments performed on the International Space Station. Four experiments were analyzed. Two of the experiments provided results consistent with the known value for the viscosity. One of the experiments did not provide sufficient data for a

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