Log in

Relevant bibliographies by topics / The wave number / Dissertations / Theses

To see the other types of publications on this topic, follow the link: The wave number.

Dissertations / Theses on the topic 'The wave number'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'The wave number.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Semwogerere, Denis Bbija. "Wave Number Selection and Defect Dynamics in Patterns with Hexagonal Symmetry." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/5300.

Full text

Abstract:

Wave Number Selection and Defect Dynamics in Patterns with Hexagonal Symmetry Denis B. Semwogerere 108 Pages Directed by Dr. Michael F. Schatz We report quantitative measurements of wave number selection, secondary instability and defect dynamics in hexagonal patterns. A novel optical technique ("thermal laser writing") is used to imprint initial patterns with selected characteristics in a B뮡rd-Marangoni convection experiment. Initial patterns of ideal hexagons are imposed to determine the band of stable-pattern wave numbers. For small values of control parameter epsilon the measured st

APA, Harvard, Vancouver, ISO, and other styles

2

Weng, Chenyang. "Theoretical and numerical studies of sound propagation in low-Mach-number duct flows." Doctoral thesis, KTH, MWL Marcus Wallenberg Laboratoriet, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168031.

Full text

Abstract:

When sound waves propagate in a duct in the presence of turbulent flow, turbulent mixing can cause attenuation of the sound waves extra to that caused by the viscothermal effects. Experiments show that compared to the viscothermal effects, this turbulent absorption becomes the dominant contribution to the sound attenuation at sufficiently low frequencies. The mechanism of this turbulent absorption is attributed to the turbulent stress and the turbulent heat transfer acting on the coherent perturbations (including the sound waves) near the duct wall, i.e. sound-turbulence interaction. The purpo

APA, Harvard, Vancouver, ISO, and other styles

3

Fu, Yun. "Linear stability of an interface between two incompressible fluids." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1142955745.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Holmberg, Andreas. "Experimental Determination of Aeracoustic Sources in Low Mach Number Internal Flows." Licentiate thesis, KTH, MWL Strömningsakustik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-26133.

Full text

Abstract:

In this thesis, the in-duct experimental methods for determining aeroacoustic N-ports of in-duct elements are discussed and improved. The scattering matrix determination methods and the related wave decomposition methods are evaluated from measurements in an empty duct carrying a mean flow. The improvements of a new over-determination method for the source part of the N-port is studied using simulations and measurements; in quiescent air as well as measurements of the flow associated noise of a mixer plate, here a triangular plate inserted at an angle in a duct. The new method is shown to impr

APA, Harvard, Vancouver, ISO, and other styles

5

Grundvig, Dane Scott. "High Order Numerical Methods for Problems in Wave Scattering." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8617.

Full text

Abstract:

Arbitrary high order numerical methods for time-harmonic acoustic scattering problems originally defined on unbounded domains are constructed. This is done by coupling recently developed high order local absorbing boundary conditions (ABCs) with finite difference methods for the Helmholtz equation. These ABCs are based on exact representations of the outgoing waves by means of farfield expansions. The finite difference methods, which are constructed from a deferred-correction (DC) technique, approximate the Helmholtz equation and the ABCs to any desired order. As a result, high order numerical

APA, Harvard, Vancouver, ISO, and other styles

6

Wenger, Christian W. "Analysis of Two-point Turbulence Measurements for Aeroacoustics." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/30837.

Full text

Abstract:

Simultaneous two-point three-component four-sensor hot-wire velocity measurements taken in three flows of aeroacoustic interest are here analyzed. The analyses provide information on the turbulence structure of the flows as it would be encountered by hypothetical noise producing blades passing through the flows. Two-point measurements taken in the first flow, a lifting wake from a rectangular NACA 0012 half wing, are used to calculate space-time correlation functions and 'pointwise' wave number frequency spectra. Two upwash spectra, calculated for locations in the region of the wake that is

APA, Harvard, Vancouver, ISO, and other styles

7

McPhillips, Kenneth J. "Far field shallow water horizontal wave number estimation given a linear towed array using fast maximum likelihood, matrix pencil, and subspace fitting techniques /." View online ; access limited to URI, 2007. http://0-digitalcommons.uri.edu.helin.uri.edu/dissertations/AAI3276997.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Sahlée, Erik. "The Influence of Waves on the Heat Exchange over Sea." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-302874.

Full text

Abstract:

The main focus of this study is the influence of waves on the heat transfer over sea. In particular, the bulk transfer coefficient CH (the Stanton number), has been investigated for possible wave influence. Measurements from the site Östergarnsholm in the Baltic Sea have been used. The site has a large sector with undisturbed over water fetch. Data during the period 1995-1999 have been used. It is shown that CH behaves differently as it approach z/L=0 from the unstable side depending on the wave state. During growing sea, CH makes a rapid drop as it passes over neutrality, strikingly different

APA, Harvard, Vancouver, ISO, and other styles

9

Hu, Yikun. "A generic approach for the study of higher-order mode propagation in circular ducts with simple aperture devices." Thesis, Loughborough University, 2007. https://dspace.lboro.ac.uk/2134/19783.

Full text

Abstract:

The aim of the work reported in this thesis is to establish a generic approach for the study of the propagation of higher-order modes in ducts of circular cross section when a simple aperture device is installed in the duct. Additionally to describe the effects of the simple aperture device on the whole in duct acoustic field, especially in the frequency range after the first higher-order mode cuts on. The approach, which is based on approximating each higher-order mode as an uncoupled mode, requires an accurate and effective decomposition of the in duct field in the higher frequency range. In

APA, Harvard, Vancouver, ISO, and other styles

10

Kai, Yun [Verfasser], Ulrich [Akademischer Betreuer] Teubner, and Joachim [Akademischer Betreuer] Peinke. "Micro shock wave: a study of supersonic compressible flow with low Reynolds number by application of ultra short laser pulse and interferometry / Yun Kai ; Ulrich Teubner, Joachim Peinke." Oldenburg : BIS der Universität Oldenburg, 2018. http://d-nb.info/1162620870/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Gnadjro, Dossou. "Nombres d'ondes, masses volumiques et modules effectifs de milieux composites formés d'une matrice poro-élastique contenant des inclusions de forme cylindrique." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMLH16/document.

Full text

Abstract:

On étudie la propagation d’ondes acoustiques dans un milieu poreux obéissant à la théorie de Biotet contenant une distribution aléatoire de cavités cylindriques et celle d’une onde acoustique dans un fluide contenant une distribution polydisperse aléatoire de sphères poreuses. Dans le premier cas on utilise la généralisation de Conoir-Norris de la formule de Linton-Martin. En effet, elle permet de prendre en compte le phénomène de la conversion entre les trois ondes (deux longitudinales et une transversale) se propageant naturellement dans un milieu poreux de Biot contenant une distribution al

APA, Harvard, Vancouver, ISO, and other styles

12

Yalcin, Omer Fatih. "A Dynamic Theory For Laminated Composites Consisting Of Anisotropic Layers." Phd thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607116/index.pdf.

Full text

Abstract:

In this thesis, first a higher order dynamic theory for anisotropic thermoelastic plates is developed. Then, based on this plate theory, two dynamic models, discrete and continuum models (DM and CM), are proposed for layered composites consisting of anisotropic thermoelastic layers. Of the two models, CM is more important, which is established in the study of periodic layered composites using smoothing operations. CM has the properties: it contains inherently the interface and Floquet conditions and facilitates the analysis of the composite, in particular, when the number of laminae in the com

APA, Harvard, Vancouver, ISO, and other styles

13

Abdolahpour, Maryam. "Residence time in coastal canopies." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2017. https://ro.ecu.edu.au/theses/1997.

Full text

Abstract:

Aquatic canopies provide important ecosystem services such as improved water quality, oxygen flux, sediment stabilisation and trapping and recycling of nutrients. The ecological health of coastal canopies and the significant ecosystem services they provide depends largely on the continuous exchange of dissolved and particulate materials across the canopy boundaries. In coastal environments, where flow is typically wavedominated, vertical mixing is believed to be the dominant process controlling residence time and, therefore, exchange. However, experiments have shown that wave-driven flows over

APA, Harvard, Vancouver, ISO, and other styles

14

Szubert, Damien. "Physics and modelling of unsteady turbulent flows around aerodynamic and hydrodynamic structures at high Reynold number by numerical simulation." Phd thesis, Toulouse, INPT, 2015. http://oatao.univ-toulouse.fr/15129/2/szubert_1.pdf.

Full text

Abstract:

This thesis aims at analysing the predictive capabilities of statistical URANS and hybrid RANS-LES methods to model complex flows at high Reynolds numbers and carrying out a physical analysis of the near-region turbulence and coherent structures. This study handles configurations included in the European research programmes ATAAC (Advanced Turbulent Simulation for Aerodynamics Application Challenges) and TFAST (Transition Location Effect on Shock Wave Boundary Layer Interaction). First, the detached flow in a configuration of a tandem of cylinders, positionned behind one another, is investigat

APA, Harvard, Vancouver, ISO, and other styles

15

Giacobello, Matteo. "Wake structure of a transversely rotating sphere at moderate Reynolds numbers." Online version, 2005. http://repository.unimelb.edu.au/10187/2840.

Full text

Abstract:

Over the last century, the problem of a viscous flow past a sphere has received on-going attention due to its many engineering applications. These include combustion processes, sediment transport processes and atmospheric flow problems, where the sphere serves as a good model for more general bluff body particles. In these environments, particles may be subjected to both translational and rotational velocities. The objective of this study was to investigate the effect that sphere rotation, about an axis transverse to the freestream flow, has on the characteristics or the vertical wake struc

APA, Harvard, Vancouver, ISO, and other styles

16

Rifi, Mohamad Azzam. "Propagation d'ondes dans un canal plan en presence d'ecoulement." Poitiers, 1987. http://www.theses.fr/1987POIT2318.

Full text

Abstract:

La propagation du mode fondamental est etudiee au moyen de l'equation de la pression (sans dispersion). Les autres situations sont abordees au moyen d'une methode de perturbation. Une approche variationnelle est egalement envisagee

APA, Harvard, Vancouver, ISO, and other styles

17

Marty, Ludovic. "Etude numérique et expérimentale d'une onde de choc induite par impact laser dans une cible solide." Poitiers, 1988. http://www.theses.fr/1988POIT2273.

Full text

Abstract:

Etude experimentale de l'influence de la nature de la cible sur la pression induite par le laser d'une part et par l'utilisation du processus de desadaptation pour amplifier la pression de l'onde de choc dans des cibles multimateriaux d'autre part. Developpement d'analyses numeriques conduisant a la mise en place d'un code monodimensionnel multimateriaux et d'un code bidimensionnel. Ces codes ont permis de preciser les mecanismes de compression du milieu. Application a l'analyse des resultats experimentaux obtenus sur des materiaux de numero atomique tres different (al, au, cu, mo, mg, ta)

APA, Harvard, Vancouver, ISO, and other styles

18

Atef, Ali Hadi Mr. "ANALYSES OF URSEIS MOHO REFLECTIONS BENEATH THE PREURALIAN FOREDEEP OF THE URAL MOUNTAINS, RUSSIA." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1181569948.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Yehya, Yassar. "Propagation des ondes acoustiques dans les conduites cylindriques de révolution." Poitiers, 1988. http://www.theses.fr/1988POIT2275.

Full text

Abstract:

Etude de l'influence de l'ecoulement dans le cas de propagation non dispersive. Aux petits nombres de mach la solution de la propagation dispersive est donnee sous la forme d'un developpement en serie du nombre de mach (methode de perturbation). Dans le cas general, l'equation est resolue par la methode galerkin

APA, Harvard, Vancouver, ISO, and other styles

20

Howell, R. J. "Wake-separation bubble interactions in low Reynolds number turbomachinery." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604667.

Full text

Abstract:

There is a continual demand for a reduction in the cost and weight of aero-engines. Suppliers of engines always need to reduce manufacturing costs and airlines want to carry more passengers or cargo. This thesis will show that reducing the number of blades in the low pressure turbine is a potent way of achieving both of these goals. Through a program of experimental and numerical work, it is shown how it is possible to reduce the number of blades in the turbine by approximately 15% relative to the first generation of high lift blading employed in the BMW Rolls-Royce BR715 low pressure turbine.

APA, Harvard, Vancouver, ISO, and other styles

21

Lytle, Joshua W. "Stability for Traveling Waves." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/3063.

Full text

Abstract:

In this work we present some of the general theory of shock waves and their stability properties. We examine the concepts of nonlinear stability and spectral stability, noting that for certain classes of equations the study of nonlinear stability is reduced to the analysis of the spectra of the linearized eigenvalue problem. A useful tool in the study of spectral stability is the Evans function, an analytic function whose zeros correspond to the eigenvalues of the linearized eigenvalue problem. We discuss techniques for numerical Evans function computation that ensure analyticity, allowing sta

APA, Harvard, Vancouver, ISO, and other styles

22

Ménard, Richard. "Saturation d'ondes de gravité et balance non-linéaire." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65947.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Croquette, Vincent. "Etude des structures convectives de Rayleigh-Bénard en géométrie étendue." Paris 6, 1986. http://www.theses.fr/1986PA066050.

Full text

Abstract:

Analyse de la transition spatio-temporelle vers le chaos dans les écoulements de type Rayleigh-Bénard. On mesure l'équivalent des constantes élastiques d'une structure de rouleaux. On détermine la sélection du nombre d'onde réalisée par les dislocations, les joints de grains et les ombilics. On propose une méthode de visualisation des structures convectives dans les gaz.

APA, Harvard, Vancouver, ISO, and other styles

24

Paula, Adson Agrico de. "The airfoil thickness effects on wavy leading edge phenomena at low Reynolds number regime." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3150/tde-27092016-153422/.

Full text

Abstract:

Recently, the wavy leading edge airfoils, inspired by the humpback whale´s flipper, have been investigated, as flow control mechanisms, at low Reynolds numbers in order to improve aerodynamic performance in this particular flow regime. The overall aim of this work is to investigate the airfoil geometric effects on wavy leading edge phenomena in the low Reynolds number regime. Experimental investigations were carried out correlating force measurements with mini-tuft and oil visualizations in order to understand the airfoil thickness effects on wavy leading edge phenomena. Three sets of airfoil

APA, Harvard, Vancouver, ISO, and other styles

25

Derbazi, Maqboula. "Étude des caractéristiques Raman et optique non-linéaire des bronzes de tungstène quadratiques (A6M2M’8O30)." Thesis, Reims, 2013. http://www.theses.fr/2013REIMS041.

Full text

Abstract:

Des recherches très importantes ont été dédiées à l'étude des composés ferroélectriques de type bronze de tungstène quadratique (TTB). Cette thèse concerne la synthèse et la caractérisation de 7 matériaux TTB de formule générale A6M2M'8O30 (A = Sr2+, Ba2+ ou Pb2+, M = Ti4+, Zr4+ ou HF4+; M' = Nb5+ ou Ta5+). Ces composés cristallins de grande taille ∼100 nm ont été synthétisés sous forme de poudre. Les moyennes expérimentales : diffractions des rayons X, spectroscopie Raman, la microscopie électronique MEB et MET, l'optique non linéaire ONL, ont permis d'établir des relations étroites entre str

APA, Harvard, Vancouver, ISO, and other styles

26

Kierkegaard, Axel. "Numerical investigations of generation and propagation of sound waves in low mach number internal flows /." Stockholm : Department of Aeronautical and Vehicle Engineering, Royal Institute of Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9388.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

McMullin, Nathan K. "Numerical simulation of plasma-based actuator vortex control of a turbulent cylinder wake /." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1558.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Ryan, Kris. "The analysis of wake structures behind stationary, freely oscillating and tethered cylinders." Monash University, Dept. of Mechanical Engineering, 2004. http://arrow.monash.edu.au/hdl/1959.1/9605.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Stamatiou, Evangelos. "Experimental investigation of the wave-turbulence interaction at low reynolds numbers in a horizontal open-channel flow." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0007/MQ40914.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Sutkowy, Mark Louis Jr. "Relationship between Rotor Wake Structures and Performance Characteristics over a Range of Low-Reynolds Number Conditions." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1534768619864476.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Siregar, Edouard. "Etude de la stabilite des disques d'accretion en astrophysique." Toulouse 3, 1987. http://www.theses.fr/1987TOU30268.

Full text

Abstract:

Etude hydrodynamique du phenomene d'accretion sur un objet compact et stabilite dynamique d'un tel ecoulement. On effectue une simulation numerique d'un flot bidimensionnel keplerien pour permettre d'estimer l'echelle de temps dynamique en fonction de la turbulence

APA, Harvard, Vancouver, ISO, and other styles

32

Boss, Emmanuel. "Dynamics of potential vorticity fronts /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/11031.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

ZHANG, JIEHAI. "NUMERICAL SIMULATIONS OF STEADY LOW-REYNOLDS-NUMBER FLOWS AND ENHANCED HEAT TRANSFER IN WAVY PLATE-FIN PASSAGES." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1109015881.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Scheid, Benoît. "Evolution and stability of falling liquid films with thermocapillary effects." Doctoral thesis, Universite Libre de Bruxelles, 2004. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211185.

Full text

Abstract:

This thesis deals with the dynamics of a thin liquid film falling down a heated plate. The heating yields surface tension gradients that induce thermocapillary stresses on the free surface, thus affecting the stability and the evolution of the film. Accounting for the coherence of the flow due to viscosity, two main approaches that reduce the dimensionality of the original problem are usually considered depending on the flow rate (as measured by the Reynolds number): the `long wave' asymptotic expansion for small Reynolds numbers and the `integral boundary layer' approximation for moderate Rey

APA, Harvard, Vancouver, ISO, and other styles

35

Dimas, Athanassios A. "Interaction between a two-dimensional wake and the free surface at low Froude numbers." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14730.

Full text

Abstract:

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1988, and (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1988.<br>Bibliography: leaf 84.<br>by Athanassios A. Dimas.<br>M.S.

APA, Harvard, Vancouver, ISO, and other styles

36

Corlett, Anne Emily. "A near wake study of vortex shedding from bluff bodies at low Reynolds numbers." Thesis, University of Edinburgh, 1996. http://hdl.handle.net/1842/13465.

Full text

Abstract:

Vortex shedding in the near wakes behind a flat plate and a circular cylinder is studied for Reynolds numbers, <I>R, </I>between 80 and 235. Particle Image Velocimetry (PIV) is used to generate velocity maps of the surface flow from which the vorticity fields are found. The majority of results are taken within the two-dimensional shedding regime for which <I>R </I>< 180. Vortex strength calculations of the Karman vortices show that there is little variation of this quantity with Reynolds number for both bodies, and that, for a circular cylinder, there is no discontinuity at a Reynolds number o

APA, Harvard, Vancouver, ISO, and other styles

37

Nessler, Chase A. "Characterization of Internal Wake Generator at Low Reynolds Number with a Linear Cascade of Low Pressure Turbine Blades." Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1270749309.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Nasreddine, Omar Fuad. "An investigation of the accuracy of heat flux determination using wake traverse measurements in relatively low Reynolds number flows." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ63345.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Yakhina, Gyuzel. "Experimental study of the tonal trailing-edge noise generated by low-reynolds number airfoils and comparison with numerical simulations." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEC008/document.

Full text

Abstract:

Le bruit tonal rayonné au bord de fuite des profils à faible nombre de Reynolds est un phénomène observé sur les ailes de drones ou micro-drones qui sont utilisés partout dans la vie quotidienne. La diminution de ce bruit va augmenter la survivabilité et l'efficacité des appareils dans le domaine militaire. De plus, cela va augmenter le champ des applications civiles et minimiser la pollution par le bruit. La réduction efficace du bruit est indispensable et, par conséquent, une compréhension complète du processus de rayonnement du bruit tonal du profil est nécessaire. Malgré le fait que des es

APA, Harvard, Vancouver, ISO, and other styles

40

McMullin, Nathan Keith. "Numerical Simulation of Plasma-Based Actuator Vortex Control of a Turbulent Cylinder Wake." BYU ScholarsArchive, 2006. https://scholarsarchive.byu.edu/etd/783.

Full text

Abstract:

A numerical study has been performed to investigate the mechanics of the turbulent wake of a circular cylinder that is controlled by a plasma actuator. The numerical investigation implements a straightforward moving wall boundary condition to model the actuator's effects on the flow. Validations of the moving wall for this simulation are set forth with the understanding that the moving wall can model the plasma actuator bulk flow effects at a distance downstream and not in a region near or on the plasma actuator. The moving wall boundary condition is then applied to a circular cylinder at a Re

APA, Harvard, Vancouver, ISO, and other styles

41

Wang, Zexuan. "Evidence for Late Pliocene Deglacial Megafloods from Giant Sediment Waves in the Northern Gulf of Mexico." TopSCHOLAR®, 2017. https://digitalcommons.wku.edu/theses/2024.

Full text

Abstract:

Laurentide Ice Sheet outburst floods to the Gulf of Mexico have been mainly documented based on deep-sea cores, especially the megafloods, only during the last several interglacial episodes in the late Pleistocene. The paleoclimatic significance of giant sedimentary structures developed under unconfined Froude-supercritical turbidity currents in subaqueous settings is considerably under-examined. This research extensively documents >20-km-wide and 200-m-thick Plio-Pleistocene giant sediment waves for the first time on the northern Gulf of Mexico continental slope using 3D seismic data, which s

APA, Harvard, Vancouver, ISO, and other styles

42

Ozturk, Burak. "Combined effects of Reynolds number, turbulence intensity and periodic unsteady wake flow conditions on boundary layer development and heat transfer of a low pressure turbine blade." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1150.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Lee, Leon. "Studie av två jetströmsstråk associerade med kraftig flygturbulens." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-161400.

Full text

Abstract:

Jetströmmar betyder mycket för meteorologer och fungerar som ett hjälpmedel för prognostisering av lågtryck. Kvadrantmodellen för jetströmsstråk beskriver hur det kan bildas lågtryck och konvergens vid marknivå på olika sidor om jetströmmen. Jetströmmar är också av betydelse för flygtrafiken, eftersom man kan spara tid och bränsle genom att flyga in i – eller genom att inte flyga in i – en jetström. Det är känt att jetströmmar ibland kan ge upphov till klarluftsturbulens (CAT), och studier har visat att turbulensen ofta är associerade med stabilt stratifierade zoner i närheten av jetströmmen.

APA, Harvard, Vancouver, ISO, and other styles

44

Monavon, Arnault. "Etude d'une couche limite instationnaire sur une paroi déformable." Paris 6, 1986. http://www.theses.fr/1986PA066369.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Young, John Aerospace Civil &amp Mechanical Engineering Australian Defence Force Academy UNSW. "Numerical simulation of the unsteady aerodynamics of flapping airfoils." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Aerospace, Civil and Mechanical Engineering, 2005. http://handle.unsw.edu.au/1959.4/38656.

Full text

Abstract:

There is currently a great deal of interest within the aviation community in the design of small, slow-flying but manoeuvrable uninhabited vehicles for reconnaissance, surveillance, and search and rescue operations in urban environments. Inspired by observation of birds, insects, fish and cetaceans, flapping wings are being actively studied in the hope that they may provide greater propulsive efficiencies than propellers and rotors at low Reynolds numbers for such Micro-Air Vehicles (MAVs). Researchers have posited the Strouhal number (combining flapping frequency, amplitude and forward speed)

APA, Harvard, Vancouver, ISO, and other styles

46

Яковенко, Р. В., R. Yakovenko, А. П. Киглюк та A. Kyglyuk. "Актуальні проблеми розвитку підприємництва". Thesis, Sheffield : Science and education LTD, 2015. http://dspace.kntu.kr.ua/jspui/handle/123456789/7067.

Full text

Abstract:

Тези аналізують показники діяльності малих підприємств в Україні за 4 роки та визначають головну проблематику The thesis analyzes the performance of small enterprises in Ukraine for 4 years and defines the main issues

APA, Harvard, Vancouver, ISO, and other styles

47

Rodesten, Stephan. "Program för frekvensanalys." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-58157.

Full text

Abstract:

Denna rapport täcker arbetsprocessen bakom att skapa en spektrumanalysator. Läsaren kommer att få läsa om den valda metoden men även alternativa metoder. Utöver detta kommer även de teoretiska delarna bakom varje moment att undersökas samt jämföras med potentiella alternativa lösningar. Projektet har utförts på uppdrag av KA Automation. Syftet med projektet var att skapa en basplattform för analys av ljudfrekvenser. Målet med detta var att kunna identifiera ljudegenskaper i form av frekvenserna hos exempelvis servomotorer i vattenpumpar. Tanken var att i ett senare utvecklingsskede kunna ident

APA, Harvard, Vancouver, ISO, and other styles

48

Anxionnaz, Zoé. "Etude de l’influence de la géométrie des canaux sur les performances d’un réacteur/échangeur." Thesis, Toulouse, INPT, 2009. http://www.theses.fr/2009INPT024G/document.

Full text

Abstract:

Le couplage de la réaction et de l’échange thermique au sein du même appareil est intéressant lors de la mise en oeuvre de synthèses exothermiques. L’appareil étudié est un échangeur/réacteur fonctionnant en continu dont la structure est basée sur celle des échangeurs de chaleur à plaques. Le passage du batch au continu n’est pas sans difficultés et une des manières d’intensifier les transferts tout en conservant un temps de séjour suffisant (régime laminaire) est de structurer, en 2D, le chemin réactionnel. Les caractérisations expérimentales et numériques de différentes géométries de canaux

APA, Harvard, Vancouver, ISO, and other styles

49

Barberini, Riccardo. "Wind Tunnel Analysis of an Automotive Wheel and Comparison with Numerical Simulations." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19430/.

Full text

Abstract:

The main purpose of this thesis is to find a relation between the results obtained with numerical simulations and the results coming from the experiments in the case of an automotive wheel. Before this study, it was investigated the phenomenon of the vortex shedding of a 2D cylinder. It was proven that the shedding frequency has a linear relation with the free stream velocity and this relation depends on the Strouhal number. The last stage of this acquistion campaign was to compare the calibration of the hot-wire anemometer with the Pitot probe and the calibration exploiting the vortex shedd

APA, Harvard, Vancouver, ISO, and other styles

50

Zimmerhaklová, Tereza. "Analýza vývoje průměrné mzdy v České republice." Master's thesis, Vysoká škola ekonomická v Praze, 2010. http://www.nusl.cz/ntk/nusl-73659.

Full text

Abstract:

This thesis is focused on analysis of the development of gross month wage and in particular on development and examining seasonality. There are also described the institutions and their surveys of wages, such as the Czech Statistical Office, Ministry of Finance and the Ministry of Labor and Social Affairs, which administers the Information System of Average Earnings. The monthly income is compared between regions and between major classes KZAM. The development of time series is modeled by the Box-Jenkins methodology, further charts of seasonal values and seasonal indexes . For comparison the a

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!