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Dissertations / Theses on the topic 'Mass boundary layer'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Halatchev, Iordan Atanassov. "Hydrodynamic stability of boundary-layer flows in the presence of mass transfer." Title page, contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09PH/09phh157.pdf.

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Bibliography: leaves 201-207. This thesis presents studies of the non-linear mass-transfer kinetics and a linear analysis of the hydrodynamic stability of systems under conditions of intense interfacial mass transfer.

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2

Salizzoni, Pietro. "Mass and momentum transfer in the urban boundary layer." Ecully, Ecole centrale de Lyon, 2006. http://www.theses.fr/2006ECDL0015.

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The dispersion of pollutants in the atmosphere in urban areas is a complex process which depends on several physical phenomena. The present work analyzes the mechanisms of the mass and momentum exchange in the urban atmospheric boundary layer. In particular we focused our attention on the lower part of the atmospheric boundary layer, where the °ow dynamics are typically determined by the size and the density of the buildings and by the street geometry. In order to analyze these processes we have performed a wind tunnel investigation of the °ow dynamics and scalar dispersion in the near-ground

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3

Mattingly, Brett T. (Brett Thomas). "Containment analysis incorporating boundary layer heat and mass transfer techniques." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/84749.

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4

Nakamura, Fuminori. "Extended film theory for transpiration boundary layer flow at high mass transfer rates." Thesis, University of Hawaii at Manoa, 2003. http://hdl.handle.net/10125/6984.

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5

Liao, Jin. "Bromine and chlorine chemistry in the Arctic boundary layer." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/45932.

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Halogen chemistry plays an important role in spring time ozone and mercury depletion events (ODEs and MDEs) and may efficiently oxidize hydrocarbons such as the important greenhouse gas methane (CH4) in the polar marine boundary layer. This thesis presents a detailed study of bromine and chlorine chemistry in the Arctic boundary layer based on measurements of bromine and chlorine containing species using chemical ionization mass spectrometry (CIMS). The capability of CIMS to accurately measure bromine oxide (BrO) was demonstrated. The first direct measurements of hypobromous acid (HOBr) were a

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6

Olanrewaju, Anuoluwapo Mary. "Analysis of boundary layer flow of nanofluid with the characteristics of heat and mass transfer." Thesis, Cape Peninsula University of Technology, 2011. http://hdl.handle.net/20.500.11838/2157.

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Thesis (MTech (Mechanical Engineering))--Cape Peninsula University of Technology, 2011.<br>Nanofluid, which was first discovered by the Argonne laboratory, is a nanotechnology- based heat transfer fluid. This fluid consists of particles which are suspended inside conventional heat transfer liquid or base fluid. The purpose of this suspension is for enhancing thermal conductivity and convective heat transfer performance of this base fluid. The name nanofluid came about as a result of the nanometer- sized particles of typical length scales 1-100nm which are stably suspended inside of the ba

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7

Barrow, Alistair. "The effects of axial flow and surface mass-flux on the stability of the rotating-sphere boundary layer." Thesis, University of Leicester, 2013. http://hdl.handle.net/2381/28456.

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A theoretical investigation is carried out into the linear stability of the boundary-layer flow around a rotating sphere immersed in an incompressible viscous fluid. Two potentially stabilising mechanisms are considered: a forced uniform axial flow in the surrounding fluid, and the introduction of mass suction/injection through the surface of the sphere. The investigation is broadly split into a “local” analysis, where a parallel-flow assumption is made which limits the study to individual latitudinal positions; and a “global” analysis, where the entire streamwise extent of the flow is conside

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8

Pergaud, Julien. "Étude et paramétrisation de la turbulence et des nuages de couche limite." Toulouse 3, 2008. http://thesesups.ups-tlse.fr/2340/.

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L'objectif principal de cette thèse était de développer une nouvelle paramétrisation améliorant le mélange et la représentation des nuages dans les couches limites convectives. Nous avons développé ainsi une paramétrisation basée sur le concept EDMF pour Eddy-Diffusivity/Mass Flux dans lequel le schéma en flux de masse représente un thermique idéalisé qui peut échanger de l'air avec son environnement et dont les parcelles d'air peuvent condensées. Dans la partie sèche de l'updraft, l'entraînement et le détrainement sont définis comme proportionnels à la flottabilité et inversement proportionne

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9

Rubach, Florian [Verfasser]. "Aerosol processes in the Planetary Boundary Layer: High resolution Aerosol Mass Spectrometry on a Zeppelin NT Airship / Florian Rubach." Wuppertal : Universitätsbibliothek Wuppertal, 2014. http://d-nb.info/1046605755/34.

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10

Lantto, Jonas. "Analytical model of mass transfer through supported liquid membranes." Thesis, KTH, Skolan för kemivetenskap (CHE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-176912.

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This report details the development and validation of a model for the simulation of supported liquid membrane processes, as applied to the extraction of lanthanides. Supported liquid membranes are systems where two phases, usually aqueous, are separated by a third phase, typically organic, which acts as a membrane, in order to separate solutes from one phase to the other. The model employs an analytical solution to the diffusion equation for the organic phase and linear approximations of the resistances to mass transfer in the aqueous phase boundary layers. The goal of this model is to underli

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11

Clendon, Penelope Catherine. "Summertime surface mass balance and atmospheric processes on the McMurdo Ice Shelf, Antarctica." Thesis, University of Canterbury. Geography, 2009. http://hdl.handle.net/10092/2630.

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The aim of this research was to demonstrate the relationship between variations in summertime surface mass balance of the McMurdo Ice Shelf and atmospheric processes. The approach encompassed a broad range of techniques. An existing energy balance mass balance model was adapted to deal with debris-covered ice surfaces and modified to produce distributed output. Point based surface energy and mass balance for two key surfaces of the ice shelf were linked to different synoptic types that were identified using a manual synoptic classification. The distributed model was initialised with distribute

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12

Metri, Prashant G. "Mathematical Analysis of Forced Convective Flow Due to Stretching Sheet and Instabilities of Natural Convective Flow." Doctoral thesis, Mälardalens högskola, Utbildningsvetenskap och Matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-35222.

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The investigations presented in the thesis are theoretical studies of magnetohydrodynamic flows, heat and mass transfer in Newtonian/non-Newtonian cooling liquids, due to horizontal/vertical stretching sheet. The theoretical studies include the effect of magnetic field, uniform and non-uniform heat source/sink (flow and temperature dependent heat source/sink) effects. The considered problems include flow of viscous fluids in the presence of applied magnetic field and electric field with first order chemical reactions. The viscous incompressible Newtonian fluid flow in porous medium with Darcy-

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13

GISOLO, DAVIDE. "Water, carbon and energy fluxes on grasslands of Western Alps: methodological issues, experimental data, hydrological modelling and atmospheric boundary layer phenomena." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2957761.

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14

Honnert, Rachel. "Quelle turbulence dans les modèles atmosphériques à l'échelle kilométrique ?" Thesis, Toulouse, INPT, 2012. http://www.theses.fr/2012INPT0119/document.

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A Météo France, le modèle opérationnel AROME a une résolution horizontale de 2,5 km. L'augmentation des moyens de calcul permettra au prochain modèle opérationnel de tourner à des résolutions de l'ordre ou inférieures au kilomètre. Il entrera donc dans une gamme de résolution appelée zone grise de la turbulence. A ces échelles, les plus grandes structures turbulentes, qui étaient jusqu'alors entièrement sous-maille, devraient être en partie résolues. Cette thèse a permis de définir ce que les modèles devaient obtenir aux échelles kilométriques et sub-kilométriques, c'est-à-dire les parts sous-

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15

Lambrinos, Grégoire. "Sublimation des milieux disperses congeles soumis a des temperatures negatives." Paris 6, 1988. http://www.theses.fr/1988PA066637.

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16

Rupp, Ariana I. K. S. "Leaf-inspired Design for Heat and Vapor Exchange." University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron15929515707363.

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17

Silva, Guilherme Araújo Lima da. "Transferência de calor e massa no escoamento bifásico em torno de aerofólios equipados com sistemas de antigelo aeronáuticos." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/3/3150/tde-27032009-082825/.

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Há a necessidade de prevenir formação de gelo nas asas e nos estabilizadores de aeronaves, pois as formas de gelo podem causar a degradação do desempenho aerodinâmico, o aumento de peso, bem como dificuldades de controle e manobra que, em casos críticos, leva a uma diminuição da margem de segurança operacional. Quando as aeronaves atravessam nuvens com gotículas de água sub-resfriadas, ou seja, em equilíbrio metaestável, o crescimento de gelo ocorre nas superfícies não protegidas. Usualmente, os sistemas antigelo térmicos de aerofólios são projetados, desenvolvidos e certificados com o auxílio

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18

Jennesson, Didier. "Étude de l'influence des phénomènes de couche limite sur le fonctionnement de photoréacteurs." Vandoeuvre-les-Nancy, INPL, 1994. http://www.theses.fr/1994INPL114N.

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Certains problèmes spécifiques de la conduite industrielle d'une réaction photochimique concernent l'influence des conditions hydrodynamiques au voisinage des parois d'irradiation sur la sélectivité et sur la rentabilité de la fabrication. En effet, le traitement de solutions photoréactives fortement concentrées en régime turbulent confine souvent le lieu de la réaction à proximité directe de la paroi, dans les zones d'amortissement de la turbulence où l'accumulation des espèces photoproduites peut s'accompagner d'effets d'absorption et de dégradation généralement désignés par l'expression phé

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19

Ferragh, Omar. "Etude du transfert de chaleur et de masse dans un écoulement d'air entre deux plaques parallèles en présence d'un ruissellement d'eau : Application aux réfrigérants industriels." Valenciennes, 1995. https://ged.uphf.fr/nuxeo/site/esupversions/4aad8950-0f32-46d7-9276-1f08fd498651.

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L'étude consiste a analyser les échanges thermiques et massiques découlant d'une évaporation par convection forcée, entre deux plaques parallèles en présence d'un ruissellement d'eau. L'étude est entreprise sous ses deux aspects: théorique et expérimental. La modélisation est basée sur les théories des couches limites dynamique et thermique couplées avec les concepts de transport de masse, au sein du fluide en écoulement, pour un régime de couches limites laminaires. Le couplage des deux problèmes thermique et massique est réalisé par l'intermédiaire des conditions à l'interface eau-air. Suite

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20

Craft, Kathleen L. "Boundary layer models of hydrothermal circulation on Earth and Mars." Thesis, Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26574.

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Continental and submarine hydrothermal systems are commonly found around the world. Similar systems that sustain water or other fluids are also likely to exist in planetary bodies throughout the solar system. Also, terrestrial submarine systems have been suggested as the locations of the first life on Earth and may, therefore, provide indications of where to find life on other planetary bodies. The study of these systems is vital to the understanding of planetary heat transfer, chemical cycling, and biological processes; hence hydrothermal processes play a fundamental role in planetary evol

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21

Silva, Guilherme Araújo Lima da. "Modelagem e simulação da operação de sistema antigelo eletrotérmico de um aerofólio." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/3/3132/tde-19092007-000212/.

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No presente trabalho foi implementado um modelo matemático para simular o sistema antigelo eletrotérmico de um aerofólio. Por meio do programa ONERA2D simulou-se o escoamento potencial completo com velocidade 44,7 m/s (100 mph) e 89,4 m/s (200 mph) em torno de um aerofólio perfil NACA0012 de corda 0,914 m (3 pés) com ângulo de ataque de 0°, e calculou-se a eficiência de coleta local de gotículas de água com diâmetro mediano volumétrico de 20 μm. Foram simuladas quatro condições de teste com diferentes distribuições de fluxo de calor nos aquecedores elétricos do sistema antigelo. O modelo

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22

Gamel, Hervé. "Caractérisation expérimentale de l'écoulement et de la dispersion autour d'un obstacle bidimensionnel." Thesis, Ecully, Ecole centrale de Lyon, 2015. http://www.theses.fr/2015ECDL0002/document.

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Depuis une dizaine d’années, l’évolution de la puissance des ordinateurs a permis de développer l’utilisation, dans les études d’ingénierie, des simulations 3D CFD (Computational Fluid Dynamics) pour l’étude de l’atmosphère à petite échelle, en particulier pour la dispersion de polluants sur des sites industriels et urbains complexes. Compte tenu de la complexité des domaines à étudier et des ressources de calcul généralement disponibles, ces études sont la plupart du temps réalisées à l’aide des modèles RANS (Reynolds Averaged Navier-Stokes), et particulièrement avec le modèle de fermeture k

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23

Josserand, Jacques, and Antoine Alemany. "Modélisation des processus de l'électrodéposition continue : approche couplée hydrodynamique et électrochimique." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0031.

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Les processus de depot electrolytique par voie humide sont utilises dans un grand nombre de secteurs industriels dans un but de protection contre la corrosion mais aussi d'amelioration du contact electrique ou de l'esthetique. Lorsque le revetement est realise en continu sur un substrat en mouvement, son homogeneite peut dependre fortement de l'hydrodynamique du bain electrolytique. Le travail presente concerne l'analyse des causes de non-uniformite du depot, liees a une distribution non homogene du courant electrique sur la cathode. Une description des phenomenes rappelle comment l'homogeneit

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24

El, Ghani Nouhayla. "Modélisation expérimentale du transfert de masse en croissance cristalline par des méthodes électrochimiques en présence d'ultrasons." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI037.

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Le brassage acoustique présente une alternative prometteuse pour l'amélioration des procédés de purification pendant la solidification du silicium photovoltaïque. Dans cette étude, on s'intéresse à la caractérisation de l'efficacité d'un brassage par acoustic streaming pour favoriser le phénomène de ségrégation. Nous avons ainsi développé une approche expérimentale originale basée sur des démonstrateurs en eau des phénomènes présents lors de la solidification. Cette démarche s'appuie sur une analogie entre d'une part la diffusion solutale des impuretés à travers la couche limite, au niveau du

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25

Leonard-Pugh, Eurion. "Acoustic anemometry on the surface of Mars." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:5179c757-3ec9-44a1-97ca-41b46b6d4873.

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There is a need for wind sensors with high accuracy and measurement frequency for deployment on the surface of Mars. The wind data obtained to date have been adversely affected by thermal contamination and calibration issues. Improved data would not only help to constrain and validate theoretical models, but also increase safety and longevity of lander operations. The mechanical and thermal wind sensing techniques used on previous missions, whilst sufficient for basic meteorology, are wholly inadequate for measuring fundamental phenomena such as dust and volatile transport. Two promising techn

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26

Rautenberg, Alexander [Verfasser], and Jens [Akademischer Betreuer] Bange. "Development of the Multi-Purpose Airborne Sensor Carrier MASC-3 and Turbulence Measurements in the Atmospheric Boundary Layer / Alexander Rautenberg ; Betreuer: Jens Bange." Tübingen : Universitätsbibliothek Tübingen, 2020. http://d-nb.info/1204422400/34.

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27

Somers, William R. "Testing Direct Simulation Monte Carlo Methods Against the Fluid Equations in the Inductively Coupled Plasma Mass Spectrometer." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2621.pdf.

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28

Harion, Jean-Luc. "Influence de différences de densité importantes sur les propriétés de transfert d'une couche limite turbulente." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0133.

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Les effets de differences de densite importantes sur les transferts turbulents en couche limite sont etudies experimentalement. L'installation principale est une soufflerie pressurisable. Les ecarts de densite au sein de la couche limite sont produits par injection tangentielle d'air ou d'helium dans un melange de ces deux constituants. Les mesures thermo-anemometriques portent sur les concentrations, vitesses et frottement parietal (valeurs moyennes, fluctuations) en aval de l'injection. Une sonde d'interference (fil+film) a ete mise au point avec de nouvelles conditions de surchauffes permet

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29

LI, YAO-HUA, and 李耀華. "Wave-induced mass transport in a turbulent bottom boundary layer." Thesis, 1987. http://ndltd.ncl.edu.tw/handle/81390784174448866380.

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30

Halatchev, Iordan Atanassov. "Hydrodynamic stability of boundary-layer flows in the presence of mass transfer / Iordan Atanassov Halatchev." Thesis, 2000. http://hdl.handle.net/2440/19835.

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Bibliography: leaves 201-207.<br>xxvi, 207 leaves : ill. ; 30 cm.<br>This thesis presents studies of the non-linear mass-transfer kinetics and a linear analysis of the hydrodynamic stability of systems under conditions of intense interfacial mass transfer.<br>Thesis (Ph.D.)--University of Adelaide, Dept. of Applied Mathematics, 2001

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31

O'Sullivan, Denis Gerard. "Fourier transform analysis of mass transfer in turbulent boundary layer flows with small diffusivities." 1992. http://catalog.hathitrust.org/api/volumes/oclc/28922380.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1992.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 44-47).

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32

Bueno, Pablo Cesar. "The effects of upstream mass injection by vortex generator jets on shock-induced turbulent boundary layer separation." Thesis, 2006. http://hdl.handle.net/2152/2469.

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33

LAI, KUN-NAN, and 賴昆男. "Surface mass flux and non-Darcy effects on the vortex instability of convective boundary layer flows." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/59803305694963404001.

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34

Narayanan, P. Sambath. "Laminar boundary layers with heat and mass transfer." Thesis, 1989. http://localhost:8080/xmlui/handle/12345678/4741.

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35

Tavakoli, Gheynani Babak. "Large eddy simulation of atmospheric boundary layer of Mars /." 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR19697.

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Thesis (M.Sc.)--York University, 2006. Graduate Programme in Earth and Space Science.<br>Typescript. Includes bibliographical references (leaves 108-114). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR19697

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36

Grounds, Stephanie Beth. "Mars Exploration Rover (MER) Panoramic Camera (Pancam) Twilight Image Analysis for Determination of Planetary Boundary Layer and Dust Particle Size Parameters." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8635.

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How the dust cycle works on Mars is a key atmospheric issue, as the dust cycle is arguably the dominant cycle in the current Martian climate. In addition, how much is known about the Martian planetary boundary layer is mostly determined from models with very little in-situ data from contemporaneous studies to validate such boundary layer characteristic assumptions, and the model studies have not been able to define a known height for a possible boundary layer on Mars using ground-based investigations prior to this research. The Mars Exploration Rovers (MERs), however, show promise in offering

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37

Beckmann, Alexander Felix. "Modeling evaporation in the rarefied gas regime by using macroscopic transport equations." Thesis, 2018. https://dspace.library.uvic.ca//handle/1828/9238.

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Due to failure of the continuum hypothesis for higher Knudsen numbers, rarefied gases and microflows of gases are particularly difficult to model. Macroscopic transport equations compete with particle methods, such as the direct simulation Monte Carlo method (DSMC) to find accurate solutions in the rarefied gas regime. Due to growing interest in micro flow applications, such as micro fuel cells, it is important to model and understand evaporation in this flow regime. To gain a better understanding of evaporation physics, a non-steady simulation for slow evaporation in a microscopic system, bas

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