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Dissertations / Theses on the topic 'Wall modeling for ibm'

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Published: 11 March 2023

Last updated: 31 July 2025

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1

Roman, Federico. "Large eddy simulation tool for environmental and industrial processes." Doctoral thesis, Università degli studi di Trieste, 2009. http://hdl.handle.net/10077/3210.

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2007/2008<br>Computational Fluid Dynamics (CFD) is an established tool for consulting and for basic research in fluid mechanics. CFD is required to provide information where analytical approaches or experiments would be impossible or too expensive. Most of the flows of engineering interest are turbulent. Turbulence is an unresolved problem of classical physics, because of the non linearity of the fluid motion equations. At the moment the only way to face them is numerically. Turbulence is composed of eddies in a broad range of size. To solve numerically the Navier-Stokes equations, the

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2

PASINATO, HUGO DARIO. "TURBULENCE IN WALL REGION MODELING." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1998. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=19290@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Neste trabalho são apresentados de uma pesquisa orientada à modelagem da turbulência de baixos números de Reynolds. Com esse objetivo foi caracterizado o escoamento turbulento de baixos números de Reynolds na região viscosa vizinha a uma parede, na base de dados experimentais e correlação empírica. Sobre essa caracterização foi feita uma análise dos valores médios de interesse para modelos de turbulência de duas equações, a qual permitiu obter conclusões sobre o comportamento da turbulência de baixos Reynolds e propor modelos par

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3

Lubchenko, Nazar. "Near-wall modeling of bubbly flows." Thesis, Massachusetts Institute of Technology, 2018. https://hdl.handle.net/1721.1/121709.

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This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Thesis: Ph. D., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2018<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 119-127).<br>Multiphase computational fluid dynamics (M-CFD) codes are gaining acceptance in the nuclear industry for the prediction of thermal-hydraulic behavior, offering the potential to improve the operation, economics, and safety of c

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4

Calafell, Sandiumenge Joan. "Efficient wall modeling for large eddy simulations of general non-equilibrium wall-bounded flows." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/667230.

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The main purpose of this thesis has been to contribute to the development of methodologies for wall modeling Large Eddy Simulations (LES) of wall-bounded flows, especially those at high Reynolds numbers. This flow configuration is widely found in a vast range of industrial applications. Unfortunately, given the physical nature of boundary layers, their accurate numerical resolution can be computationally unaffordable. Wall modeling aims at reproducing the inner layer effects on the flow without resolving it explicitly. This allows performing accurate numerical simulations of high Reynolds numb

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Krank, Benjamin [Verfasser], Wolfgang A. [Akademischer Betreuer] Wall, Wolfgang A. [Gutachter] Wall, and Claus-Dieter [Gutachter] Munz. "Wall Modeling via Function Enrichment for Computational Fluid Dynamics / Benjamin Krank ; Gutachter: Wolfgang A. Wall, Claus-Dieter Munz ; Betreuer: Wolfgang A. Wall." München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/1180602099/34.

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6

Pajayakrit, Palanunt. "Turbulence modeling for curved wall jets under adverse pressure gradient." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ26861.pdf.

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Kamel, Sherif I. (Sherif Ibrahim). "Mathematical modeling of wet flashover mechanism of HVDC wall bushings." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28792.

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HVDC wall bushings constitute a basic component of converter stations and their adequate performance is vital to insure a highly reliable level of operation. Service records show that the number of flashovers in converter stations has increased substantially during recent years and that the majority of flashovers occurred on HVDC wall bushings. This work presents the first mathematical model to provide the necessary and sufficient conditions for flashover of HVDC wall bushings under nonuniform wetting. The model suggests that the onset of streamers bridging the dry zone and initiated by the no

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8

Pajayakrit, Palanunt Carleton University Dissertation Engineering Mechanical and Aerospace. "Turbulence modeling for curved wall jets under adverse pressure gradient." Ottawa, 1997.

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9

Mensah-Gourmel, Johanne. "Modeling biodegradable stents and their effect on the arterial wall." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLX034/document.

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Les stents sont aujourd’hui le traitement le plus courant des stades avancés de l’athérosclérose. Le concept de stents bioresorbables (BRS) est basé sur l’idée qu’un stent n’est nécessaire que jusqu’à la guérison de l’artère – suite à quoi il serait préférable que le stent disparaisse, afin de retrouver un état plus physiologique. Le déploiement d’un stent altère significativement les contraintes mécaniques exercées sur la paroi artérielle, or celles-ci jouent un rôle important dans l’incidence de complications telle que la resténose et l’hyperplasie néointimale. Dans le cas d’un BRS, les cont

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10

NASSERI, SEYED ALI. "Magnetic Domain Wall Motion: Numerical Simulation and Collective Coordinate Modeling." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2710713.

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Manipulating magnetic domain walls in nanostructures has been linked with applications in spintronic logic, sensing and storage devices. Recent studies of domain wall motion have focused on perpendicular magnetic anisotropy heterostructures of ultrathin ferromagnets sandwiched between a heavy metal layer and an oxide, in which spin-orbit coupling and broken inversion symmetry can dominate domain wall motion. Specifically, chiral domain walls are stabilized in these systems due to the Dzyaloshinskii-Moriya interaction, and current-driven domain wall motion is enhanced due to the spin Hall eff

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11

Sjölinder, Emil. "Spray and Wall Film Modeling with Conjugate Heat Transfer in OpenFOAM." Thesis, Linköpings universitet, Mekanisk värmeteori och strömningslära, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-84487.

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This master thesis was provided by Scania AB. The objective of this thesis was to modify an application in the free Computational Fluid Dynamics software OpenFOAM to be able to handle spray and wall film modeling of a Urea Water Solution together with Conjugate Heat Transfer. The basic purpose is to widen the knowledge of the vaporization process of a Urea Water Solution in the exhaust gas after treatment system for a diesel engine by using OpenFOAM. First, urea has been modeled as a very viscous liquid at low temperature to mimic the solidication process of urea. Second, the development of th

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12

Thiele, Roman. "Mechanistic Modeling of Wall-Fluid Thermal Interactions for Innovative Nuclear Systems." Doctoral thesis, KTH, Reaktorteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-177370.

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Next generation nuclear power plants (GEN-IV) will be capable of not only producing energy in a reliable, safe and sustainable way, but they will also be capable of reducing the amount of nuclear waste, which has been accumulated over the lifetime of current-generation nuclear power plants, through transmutation. Due to the use of new and different coolants, existing computational tools need to be tested, further developed and improved in order to thermal-hydraulically design these power plants.This work covers two different non-unity Prandtl number fluids which are considered as coolants in G

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13

Rausch, Sophie [Verfasser], Wolfgang A. [Akademischer Betreuer] Wall, and Markus [Akademischer Betreuer] Böl. "Computational and Experimental Modeling of Lung Parenchyma / Sophie Rausch. Gutachter: Wolfgang A. Wall ; Markus Böl. Betreuer: Wolfgang A. Wall." München : Universitätsbibliothek der TU München, 2012. http://d-nb.info/1025150422/34.

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14

Pfaller, Martin [Verfasser], Wolfgang A. [Akademischer Betreuer] Wall, Wolfgang A. [Gutachter] Wall, and Dominique [Gutachter] Chapelle. "Predictive Computational Modeling of Patient-Specific Cardiac Mechanics / Martin Pfaller ; Gutachter: Wolfgang A. Wall, Dominique Chapelle ; Betreuer: Wolfgang A. Wall." München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/1190818744/34.

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15

Ismail, Mahmoud [Verfasser], Wolfgang A. [Akademischer Betreuer] Wall, and Perumal [Akademischer Betreuer] Nithiarasu. "Reduced Dimensional Modeling of the Entire Human Lung / Mahmoud Ismail. Gutachter: Wolfgang A. Wall ; Perumal Nithiarasu. Betreuer: Wolfgang A. Wall." München : Universitätsbibliothek der TU München, 2014. http://d-nb.info/1068315776/34.

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16

Li, Jinxia. "Lubricating grease Experiments and modeling of wall-bounded- and free-surface flows." Doctoral thesis, Luleå tekniska universitet, Maskinelement, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26489.

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Lubricating grease is commonly applied to lubricate e.g. rolling bearings, sealsand gears. Grease has some clear advantages over lubricating oil: it is a semisolidmaterial, which prevents it from flowing/ leaking out from the bearingsystem and gives it sealing properties, and it also protects the system fromcontaminants and corrosion. Due to its consistency, lubricating grease has manyadditional advantages over lubricating oil: it does not require pumps, filters andsumps. However, the rheology of grease makes it more difficult to measure andstudy its flow dynamics. This study focuses on the in

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17

Gil, Edward Matthew. "Computational Modeling of Glass Curtain Wall Systems to Support Fragility Curve Development." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/94051.

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With the increased push towards performance-based engineering (PBE) design, there is a need to understand and design more resilient building envelopes when subjected to natural hazards. Since architectural glass curtain walls (CW) have become a popular façade type, it is important to understand how these CW systems behave under extreme loading, including the relationship between damage states and loading conditions. This study subjects 3D computational models of glass CW systems to in- and out-of-plane loading simulations, which can represent the effects of earthquake or hurricane events. The

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18

Bair, Shawn D. "Computational Modeling of the Electrical Sensing Properties of Single Wall Carbon Nanotubes." Youngstown State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1441813278.

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19

Habteyes, Firdaweke. "Modeling Acute Changes in Bladder Wall Tension, Shape and Compliance During Filling." VCU Scholars Compass, 2014. http://scholarscompass.vcu.edu/etd/3537.

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The bladder wall consists primarily of detrusor smooth muscle. Tension-sensitive nerves in the bladder wall are responsible for providing bladder fullness information that is interpreted as urgency. Bladder wall tension, and therefore nerve output, is a function of bladder volume, shape and material properties. Studies have shown that the bladder wall exhibits acutely regulated detrusor compliance. In addition, bladder shape throughout filling depends on intra-abdominal forces and material properties of the bladder wall, such as regulated detrusor compliance. This thesis focused on modeling th

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20

Hörmann, Julia Maria [Verfasser], Wolfgang A. [Akademischer Betreuer] Wall, Wolfgang A. [Gutachter] Wall, and Björn H. [Gutachter] Menze. "Multiphysics Coupled Computational Modeling in Cardiac Electromechanics / Julia Maria Hörmann ; Gutachter: Wolfgang A. Wall, Björn H. Menze ; Betreuer: Wolfgang A. Wall." München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/1186889403/34.

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21

Roth, Christian J. [Verfasser], Wolfgang A. [Akademischer Betreuer] [Gutachter] Wall, and Marcel [Gutachter] Filoche. "Multi-dimensional Coupled Computational Modeling in Respiratory Biomechanics / Christian J. Roth ; Gutachter: Wolfgang A. Wall, Marcel Filoche ; Betreuer: Wolfgang A. Wall." München : Universitätsbibliothek der TU München, 2017. http://d-nb.info/1140165925/34.

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22

Valsecchi, Pietro. "Temporal Numerical Simulations of Turbulent Coanda Wall Jets." Diss., The University of Arizona, 2006. http://hdl.handle.net/10150/195025.

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In a novel application of the temporal numerical simulation, an investigation ofturbulence modeling techniques is carried for the turbulent wall jet over aconvex surface (Coanda wall jet.) The simultaneous presence of multipleinstability mechanisms and the interaction with the turbulence dynamics at thesolid boundary produces a unique combination of different large turbulentcoherent structures that constitutes both a consistent challenge for numericalsimulations and an ideal test bed for turbulence models.The Temporal Direct Numerical Simulation (TDNS) of the Coanda wall jetrestricts the focus

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23

LEE, KWANGDEOK. "QUANTIFYING BARRIERS TO MACROMOLECULAR TRANSPORT IN THE ARTERIAL WALL." Case Western Reserve University School of Graduate Studies / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=case1152557910.

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24

Kormendy, Imre, and Mustafa Muwaili. "Timber Shear Wall Analysis : Parameterized Finite Element Modelling." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-77199.

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This paper investigates the linear elastic behavior of timber shear walls under monotonic prescribed displacement. ABAQUS© 16.4-5, is a numerical finite element software used as the primary analysis methodology. Parameterized models are created for two shear wall specimens of different geometry concerning door and window configurations. The shear walls are simulated as solid timber framing which is mechanically connected to gypsum sheathing board through fasteners. The primary findings are the linear elastic shear force distribution of the mechanical joints. Additionally, deformations and rea

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25

Chung, Daniel Pullin Dale Ian Pullin Dale Ian. "Numerical simulation and subgrid-scale modeling of mixing and wall-bounded turbulent flows." Diss., Pasadena, Calif. : California Institute of Technology, 2009. http://resolver.caltech.edu/CaltechETD:etd-05292009-123828.

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Thesis (Ph.D.) -- California Institute of Technology,2009.<br>Advisor name found in the Acknowledgments pages of the thesis. Title from home page (viewed 05/04/2010). Includes bibliographical references.

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26

Barp, Stefan. "Numerical prediction of horizontal, thermally unstably stratified, turbulent wall flows by RANS modeling /." Zürich, 2005. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16016.

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27

Papadimitriou, Andreas. "Modeling, Identification and Control of a Wall Climbing Robot Based on Vortex Actuation." Thesis, Luleå tekniska universitet, Drift, underhåll och akustik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70626.

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28

Gupta, Ankit. "Multi-Scale Modeling of Mechanical Properties of Single Wall Carbon Nanotube (SWCNT) Networks." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/1022.

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Single wall carbon nanotubes (SWCNTs) show a variety of unparalleled properties such as high electrical and thermal conductivity, high specific surface area (SSA) and a large stiffness under axial loads. One of the major challenges in tapping the vast potential of SWCNTs is to fabricate nanotube based macrostructures that retain the unique properties of nanotubes. Pristine SWCNT aerogels are highly porous, isotropic structures of nanotubes mediated via van der Waals (VDW) interactions at junctions. The mechanical behavior of such aerogels is examined in several experimental studies. However, i

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Barrows, Richard James. "Two Dimensional Finite Element Modeling of Swift Delta Soil Nail Wall by "ABAQUS"." PDXScholar, 1994. https://pdxscholar.library.pdx.edu/open_access_etds/4741.

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Soil nail walls are a form of mechanical earth stabilization for cut situations. They consist of the introduction of passive inclusions (nails) into soil cut lifts. These nailed lifts are then tied together with a structural facing (usually shotcrete) . The wall lifts are constructed incrementally from the top of cut down. Soil nail walls are being recognized as having potential for large cost savings over other alternatives. The increasing need to provide high capacity roadways in restricted rights of way under structures such as bridges will require increasing use of techniques such as combi

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Mahmud, Khan Raqib. "Sensitivity Analysis of Near-Wall Turbulence Modeling for Large Eddy Simulation of Incompressible Flows." Thesis, KTH, Numerisk analys, NA, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146098.

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Wall layer models are very important for the simulation of turbulent flows in complex geometries to characterize the significant flow features. For the simulation of turbulent flows, the performance of Large Eddy Simulation techniques with different wall layer models which we refer to as near-wall turbulence modeling for turbulent flows are analyzed. The wall shear stress model and Delayed Detached Eddy Simulation wall model are two options, that can be used to model the turbulent boundary layer. In this project, a wall shear stress model is used as a near-wall turbulence model in the G2 simul

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31

Luo, Haoxiang. "The interaction of near-wall turbulence with compliant tensegrity fabrics : modeling, simulation, and optimization /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2004. http://wwwlib.umi.com/cr/ucsd/fullcit?p3144307.

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32

Jayamon, Jeena Rachel. "Seismic Performance Assessment of Wood-Frame Shear Wall Structures." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/84902.

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Wood-frame shear wall structures are widely used for residential and commercial buildings. These buildings are lightweight, have very ductile connections and includes multiple load paths. The main objective of this dissertation is to evaluate the seismic performance of a wide range of wood-frame shear wall building designs under the influence of modeling and analysis parameter variations. The first step towards the broad objective of seismic performance evaluation is to identify the different modeling and analysis parameters that can have a potential influence in the seismic response varia

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33

Alaoui, Miloud. "Coherent structures and wall-pressure fluctuations modeling in turbulent boundary layers subjected to pressure gradients." Thesis, Paris, ENSAM, 2016. http://www.theses.fr/2016ENAM0077/document.

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L'écoulement autour des véhicules produit une couche limite turbulente très proche de la paroi. Le caractère turbulent induit des fluctuations de pression pariétale qui font vibrer les panneaux du véhicule. Ces vibrations sont alors transmises à travers la structure et rayonnent du bruit dans l’habitacle. Les niveaux sonores dus à l'écoulement augmentent avec la vitesse du véhicule. Pour cette raison, cette problématique connaît un intérêt croissant dans le secteur aéronautique.Le but de cette thèse est double : comprendre les mécanismes à l’origine de ces fluctuations de pression à la paroi e

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34

Golshan, Roozbeh. "Residual-based Variational Multiscale LES with Wall-modeling for Oceanic Boundary Layers in Shallow Water." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5489.

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Large-eddy simulation (LES) of wind and wave forced oceanic turbulent boundary layers is performed using the residual-based variational multiscale method (RBVMS) and near-wall modeling. Wind and surface gravity wave forcing generates Langmuir turbulence characterized by Langmuir circulation (LC) with largest scales consisting of streamwise vortices aligned in the direction of the wind, acting as a secondary flow structure to the primary wind-driven component of the flow. The LES here is representative of a shallow water continental shelf flow (10 to 30 meters in depth) far from lateral boundar

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35

Wiechert, Lena [Verfasser], Gerhard A. [Akademischer Betreuer] Holzapfel, and Wolfgang A. [Akademischer Betreuer] Wall. "Computational Modeling of Multi-Field and Multi-Scale Phenomena in Respiratory Mechanics / Lena Wiechert. Gutachter: Gerhard A. Holzapfel ; Wolfgang A. Wall. Betreuer: Wolfgang A. Wall." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/1013436458/34.

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Metzke, Robert [Verfasser], Wolfgang A. [Akademischer Betreuer] Wall, and Mohammad R. K. [Akademischer Betreuer] Mofrad. "Modeling and experimental investigation of the mechanobiological environment associated with alveolar pneumocytes / Robert Metzke. Gutachter: Wolfgang A. Wall ; Mohammad R. K. Mofrad. Betreuer: Wolfgang A. Wall." München : Universitätsbibliothek der TU München, 2014. http://d-nb.info/1064695000/34.

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Laing, Jeffrey M. "Finite Element Modeling and Validation of a Novel Process for Extruding Thin Wall Hollow Copper Profiles." Ohio University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1327333357.

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Hazer, Dilana [Verfasser]. "Automated Patient-Specific Modeling of Blood Flow and Vessel Wall Mechanics in Aortic Pathology / Dilana Hazer." München : Verlag Dr. Hut, 2010. http://d-nb.info/100948530X/34.

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Wu, Ai. "Etudes comparatives des architectures des reseaux locaux et implementation du protocole x. 25 sur ibm pc." Paris, ENST, 1987. http://www.theses.fr/1987ENST0017.

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Ce travail est compose de deux parties: 1) etude comparative des architectures des reseaux locaux. Les problemes lies a la modelisation de protocoles et a l'evaluation de performances d'un systeme de communication sont analyses. 2) l'implementation du protocole x. 25 sur ibm-pc a pour objectif de connecter cette importante famille des ordinateurs personnels sur les reseaux x. 25. La conception du systeme et la realisation du logiciel sont presentees. Une serie de mesures de performance a ete realisee en utilisant une application de transfert de fichier. Les resultats sont analyses

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Vaal, Michael Hamman de [Verfasser], Wolfgang A. [Akademischer Betreuer] Wall, Ulrich A. [Akademischer Betreuer] Stock, and Michael W. [Akademischer Betreuer] Gee. "Computational modeling, clinical comprehension and improvement of aortic manipulation / Michael Hamman de Vaal. Betreuer: Wolfgang A. Wall. Gutachter: Wolfgang A. Wall ; Ulrich A. Stock ; Michael W. Gee." München : Universitätsbibliothek der TU München, 2015. http://d-nb.info/1079323937/34.

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Maier, Andreas [Verfasser], Wolfgang A. [Akademischer Betreuer] Wall, C. Alberto [Akademischer Betreuer] Figueroa, and Hans-Henning Georg Ulrich [Akademischer Betreuer] Eckstein. "Computational Modeling of Rupture Risk in Abdominal Aortic Aneurysms / Andreas Maier. Gutachter: C. Alberto Figueroa ; Wolfgang A. Wall ; Hans-Henning Georg Ulrich Eckstein. Betreuer: Wolfgang A. Wall." München : Universitätsbibliothek der TU München, 2012. http://d-nb.info/103626243X/34.

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42

Andrae, Johan. "Wall Related Lean Premixed Combustion Modeled with Complex Chemistry." Doctoral thesis, KTH, Kemiteknik, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3455.

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Increased knowledge into the physics and chemistrycontrolling emissions from flame-surface interactions shouldhelp in the design of combustion engines featuring improvedfuel economy and reduced emissions. The overall aim of this work has been to obtain afundamental understanding of wall-related, premixed combustionusing numerical modeling with detailed chemical kinetics. Thiswork has utilized CHEMKIN®, one of the leading softwarepackages for modeling combustion kinetics. The simple fuels hydrogen and methane as well as the morecomplex fuels propane and gasified biomass have been used inthe mod

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Wang, Jin. "Modeling of concrete dehydration and multhiphase transfer in nuclear containment concrete wall during loss of cooling accident." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30098/document.

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Les centrales nucléaires jouent un rôle important au niveau mondial dans la production d'électricité aujourd'hui. Dans l'histoire humaine, deux accidents tragiques ont déjà eu lieu, à Tchernobyl et Fukushima, provoquant des fuites des matières radioactives. Pour éviter ce genre d'accident dans la future, la construction en béton prend un rôle important en tant que matériau de construction de confinement qui est la dernière barrière pour isoler la matière radioactive de l'environnement. La compréhension des transferts dans le béton dans des circonstances graves, en particulier à étudier le comp

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Wells, Jesse Buchanan. "Effects of Turbulence Modeling on RANS Simulations of Tip Vortices." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/34343.

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The primary purpose of this thesis is to quantify the effects of RANS turbulence modeling on the resolution of free shear vortical flows. The simulation of aerodynamic wing-tip vortices is used as a test bed. The primary configuration is flow over an isolated finite wing with aspect ratio, , and Reynolds number, . Tip-vortex velocity profiles, vortex core and wake turbulence levels, and Reynolds stresses are compared with wind tunnel measurements. Three turbulence models for RANS closure are tested: the Lumley, Reece, and Rodi full Reynolds stress transport model and the Sparlart-Allmaras

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45

Andersson, Johan, and Oscar Wyckman. "Modeling of Fuel Dynamics in a Small Two-Stroke Engine Crankcase." Thesis, Linköpings universitet, Fordonssystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119061.

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For any crankcase scavenged two-stroke engine, the fuel dynamics is not easily predicted. This is due to the fact that the fuel has to pass the crankcase volume before it enters the combustion chamber. This thesis is about the development of a model for fuel dynamics in the crankcase of a small crankcase scavenged two-stroke engine that gives realistic dynamic behavior. The crankcase model developed in this thesis has two parts. One part is a model for wall wetting and the other part is a model for concentration of evaporated fuel in the crankcase. Wall wetting is a phenomenon where fuel is ac

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46

Maurya, Abhilasha. "Computational simulation and analytical development of Buckling Resistant Steel Plate Shear Wall (BR-SPSW)." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/34466.

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Steel plate shear walls (SPSWs) are an attractive option for lateral load resisting systems for both new and retrofit construction. They, however, present various challenges that can result in very thin web plates and excessively large boundary elements with moment connections, neither of which is economically desirable. Moreover, SPSW also suffers from buckling at small loads which results in highly pinched hysteretic behavior, low stiffness, and limited energy dissipation. To mitigate these shortcomings, a new type of SPSW has been developed and investigated. The buckling resistant steel pla

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Sharma, Abhinav. "ESTIMATING THE EFFECTS OF BLASTING VIBRATIONS ON THE HIGH-WALL STABILITY." UKnowledge, 2017. https://uknowledge.uky.edu/mng_etds/38.

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The stability of the high-walls is one of the major concerns for open pit mines. Among the various factors affecting the stability of high-walls, blast vibrations can be an important one. In general, worldwide the established respective government regulations and industry standards are used as guidance to determine the maximum recommended levels of the peak particle velocity and frequency from the blast to avoid any effects on the structures around the mining project. However, most of the regulations are meant for buildings or houses and do not concern high-walls. This thesis investigates the

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Ben, Nasr Ouissem. "Numerical simulations of supersonic turbulent wall-bounded flows." Phd thesis, INSA de Rouen, 2012. http://tel.archives-ouvertes.fr/tel-01059805.

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This work deals with spatially-evolving supersonic turbulent boundary layers over adiabatic and cold walls at M∞ = 2 and up to Re0 ≈ 2600 using 3 different SGS models. The numerical methodology is based on high-order split-centered scheme to discretize the convective fluxes of the Navier-Stokes equations . For the adiabatic case, it is demonstrated that all SGS models require a comparable minimum grid-refinement in order to capture accurately the near-wall-turbulence. Overall, the models exhibit correct behavior when predictiong the dynamic properties, but show different performances for the t

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Faisal, Md Tanvir. "A multiscale approach to mechancial modeling of a leaf petiole: integrating cell wall, cellular tissues, and structural morphology." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=121448.

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A plant is a natural hierarchical structure, which exhibits remarkable mechanical properties. The macro (scale) mechanical properties of a plant are the cumulative outcome of the structural properties of its preceding level of structural hierarchy. To develop engineering structures inspired by a plant and its organs, a comprehensive characterization of its mechanical properties exhibited at multiple hierarchical orders is essential to mimic such structures for engineering application. This thesis presents a set of theoretical and computational models at various orders of the structural hier

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50

Almohammed, Naser [Verfasser]. "Modeling and Simulation of Particle Agglomeration, Droplet Coalescence and Particle-Wall Adhesion in Turbulent Multiphase Flows / Naser Almohammed." Hamburg : Helmut-Schmidt-Universität, Bibliothek, 2018. http://d-nb.info/1153126729/34.

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