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Dissertations / Theses on the topic 'Boundary layer function'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Dasi, Lakshmi P. "The small-scale structure of passive scalar mixing in turbulent boundary layers." Diss., Available online, Georgia Institute of Technology, 2004, 2004. http://etd.gatech.edu/theses/available/etd-08132004-065041/.

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Thesis (Ph. D.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2006.<br>Cvitanovic, Predrag, Committee Member ; Roberts, Phillip, Committee Member ; Sturm, Terry, Committee Member ; Webster, Donald, Committee Chair ; Yeung, Pui-Kuen, Committee Member.

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2

辻, 義之, Yoshiyuki TSUJI, 圭. 宮地, Kei MIYACHI, 育雄中村 та Ikuo NAKAMURA. "平板乱流境界層対数速度分布領域における変動速度確率密度関数の特性 (第２報, レイノルズ数依存性について)". 日本機械学会, 2002. http://hdl.handle.net/2237/9103.

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3

Palombo, Carlo Loris. "Development and validation of an improved wall-function boundary condition for computational aerodynamics." Thesis, KTH, Strömningsmekanik och Teknisk Akustik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-293754.

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Computational Fluid Dynamics is a powerful and widely used tool for developing projectsthat concern flow motion, in very different fields. Industrial CFD solvers are continuouslydeveloped with the aim of improving accuracy and reducing the computational cost of thesimulations. Turbulent wall-flow cases are particular demanding as the presence of a solidsurfaceinterface generates steep gradients in the proximity of the wall. Resolving suchgradients can be crucial to obtain a consistent solution but also very expensive in terms ofgrid refinement, and hence computational time. Wall functions are

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4

辻, 義之, Yoshiyuki TSUJI, 圭. 宮地 та ін. "平板乱流境界層対数速度分布領域における変動速度確率密度関数の特性 (第３報, 対数法則領域における整構造の役割)". 日本機械学会, 2004. http://hdl.handle.net/2237/9097.

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5

Ožana, Marek. "Mesoscopic superconductivity : quasiclassical approach." Doctoral thesis, Umeå universitet, Institutionen för fysik, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-91484.

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This Thesis is concerned with the quasiclassical theory of meso-scopic superconductivity. The aim of the Thesis is to introduce the boundary conditions for a quasiclassical Green’s function on partially transparent interfaces in mesoscopic superconducting structures and to analyze the range of applicability of the quasiclassical theory. The linear boundary conditions for Andreev amplitudes, factoring the quasiclassical Green’s function, are presented. The quasiclassical theory on classical trajectories is reviewed and then generalized to include knots with paths intersections. The main focus

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6

Nilsson, Erik. "Flux Attenuation due to Sensor Displacement over Sea." Thesis, Uppsala University, Department of Earth Sciences, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8024.

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<p>In this study the flux attenuation due to sensor displacement has been investigated over sea using an extensive set of data from the "Ocean Horizontal Array Turbulence Study". All previous investigations of the flux attenuation have been performed over land.</p><p>A function developed for correcting fluxes in the homogenous surface layer was compared to measured flux attenuation. This investigation revealed the possibility to find new functions describing the flux attenuation when measurements are carried out over sea. From the measured flux attenuation studied here a change in the form of

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7

Manomaiphiboon, Kasemsan. "Estimation of Emission Strength and Air Pollutant Concentrations by Lagrangian Particle Modeling." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5141.

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A Lagrangian particle model was applied to estimating emission strength and air pollutant concentrations specifically for the short-range dispersion of an air pollutant in the atmospheric boundary layer. The model performance was evaluated with experimental data. The model was then used as the platform of parametric uncertainty analysis, in which effects of uncertainties in five parameters (Monin-Obukhov length, friction velocity, roughness height, mixing height, and the universal constant of the random component) of the model on mean ground-level concentrations were examined under slightly

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8

Vande, Hey Joshua D. "Design, implementation, and characterisation of a novel lidar ceilometer." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/11853.

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A novel lidar ceilometer prototype based on divided lens optics has been designed, built, characterised, and tested. The primary applications for this manufacturable ground-based sensor are the determination of cloud base height and the measurement of vertical visibility. First, the design, which was developed in order to achieve superior performance at a low cost, is described in detail, along with the process used to develop it. The primary design considerations of optical signal to noise ratio, range-dependent overlap of the transmitter and receiver channels, and manufacturability, were bal

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9

Bertolotti, Fabio P. "Temporal and spatial growth of subharmonic disturbances in Falkner-Skan flows." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/90912.

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The transition from laminar to turbulent flow in boundary-layers occurs in three stages: onset of two-dimensional TS waves, onset of three-dimensional secondary disturbances of fundamental or subharmonic type, and onset of the turbulent regime. In free flight conditions, subharmonic disturbances are the most amplified. Recent modeling of the subharmonic disturbance as a parametric instability arising from the presence of a finite amplitude TS wave has given results in quantitative agreement with experiments conducted in a Blasius boundary-layer. The present work extends the analysis to the F

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10

Vahlberg, Caroline. "Non-dimensional gradient functions for water vapor and carbon dioxide in the marine boundary layer." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-251400.

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A better understanding of the exchange processes taking place over the oceans is of great importance since the oceans cover about 70 % of the Earth’s surface. With better knowledge the turbulent fluxes can be more accurate parameterized, which is essential in order to improve the weather- and climate models. In this study, the non-dimensional gradient functions for water vapor (Φq) and carbon dioxide (Φc) in the marine boundary layer have principally been studied. The quality of the instrumentation used in the study has also been evaluated. The study is mainly based on tower measurements of tu

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11

Furbo, Eric. "Evaluation of RANS turbulence models for flow problems with signigicant impact of boundary layers." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-138757.

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This master’s thesis was provided by the Swedish Defence Research Agency, FOI. The task is to test several RANS (Reynolds-averaged Navier-Stokes) models on two different case geometries and compare the results with LES and experimental data. The ﬁrst is two dimensional, constructed for flow separation at a sharp edge. The second is three dimensional and flow separation occurs at a smooth surface. The models tested are implemented in the open source CFD (Computational Fluid Dynamics) program, OpenFOAM. OpenFOAM uses the finite volume method and the SIMPLE algorithm as solution procedure. The ma

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12

Yarahmadian, Shantia. "Point wise Green function bounds and long-time stability of large-amplitude noncharacteristic boundary layers." [Bloomington, Ind.] : Indiana University, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3337271.

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Thesis (Ph.D.)--Indiana University, Dept. of Mathematics, 2008.<br>Title from PDF t.p. (viewed on Jul 28, 2009). Source: Dissertation Abstracts International, Volume: 69-12, Section: B, page: 7553. Adviser: Kevin Zumbrun.

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13

Lindgren, Kristina. "The Behaviour of the Latent Heat Exchange Coefficient in the Stable Marine Boundary Layer." Thesis, Uppsala University, Department of Earth Sciences, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9140.

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<p>Knowledge of the turbulent fluxes at the sea surface is important for understanding the interaction between atmosphere and ocean. With better knowledge, improvements in the estimation of the heat exchange coefficients can be made and hence models are able to predict the weather and future climate with higher accuracy.</p><p>The exchange coefficients of latent and sensible heat during stable stratification vary in the literature. Therefore it is necessary to investigate the processes influencing the air-sea exchange of water vapour and heat in order to estimate these values. With measurement

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14

Jiménez, Cortés Maria Antònia. "Stably stratified atmospheric boundary layer: study trough large-eddy simulations, mesoscale modelling and observations." Doctoral thesis, Universitat de les Illes Balears, 2005. http://hdl.handle.net/10803/9433.

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La capa límit atmosfèrica és l'àrea directament influenciada per la presència de la superfície de la terra i la seva alçada és d'uns centenars de metres a uns pocs quilòmetres. Durant el vespre, el refredament radiatiu estratifica establement l'aire prop del sòl i es forma el que es coneix com a Capa Límit Estable (CLE). D'avui en dia, la CLE és un règim que encara no està prou ben caracteritzat. La turbulència, que no és homogènia ni isòtropa, i la gran importància dels efectes locals com l'orografia, entre d'altres factors, dificulten l'estudi d'aquest règim. Per aquest motiu, la CLE és obje

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15

Pinier, Benoît. "Application de la théorie des similitudes en turbulence à l'interface océan atmosphère." Thesis, Rennes 1, 2019. http://www.theses.fr/2019REN1S002/document.

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Le modèle RANS à une équation de fermeture est utilisée avec une nouvelle longueur de mélange. par interpolation, notre loi est universelle. Nous avons étendue ce résultat pour considérer les fonds rugueux. L'existence d'une solution au système d'équation associée est montrée, c'est un problème elliptique avec un terme source dans L¹. Nous utilisons le modèle "under location uncertainty" pour obtenir un profil de vitesse cohérent dans toute la couche limite turbulente. Le raisonnement que nous apportons ici lie un terme sous-grille à ce profile. Nous apportons également une estimation des vari

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16

Alves, Claudia Marins. "Stochastic models for the treatment of dispersion in the atmosphere." Laboratório Nacional de Computação Científica, 2006. http://www.lncc.br/tdmc/tde_busca/arquivo.php?codArquivo=135.

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Lagrangian stochastic models are a largely used tool in the study of passive substances dispersion inside the Atmospheric Boundary Layer. Its application is related to the trajectory computation of thousands of particles, that numerically simulate the dispersion of suspense substances in the atmosphere. In this study, the basic concepts related to the Lagrangian stochastic modelling are presented and discussed together with its main characteristics and its computational implementation, to the study of particles dispersion in the atmosphere. In a computational experiment, the obtained result

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17

Alves, Claudia Marins. "Modelos estocásticos para tratamento da dispersão de material particulado na atmosfera." Laboratório Nacional de Computação Científica, 2006. https://tede.lncc.br/handle/tede/62.

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Made available in DSpace on 2015-03-04T18:50:49Z (GMT). No. of bitstreams: 1 tese.pdf: 5590910 bytes, checksum: a89ccd96ade2b696f0e5b9163dc31bf5 (MD5) Previous issue date: 2006-11-13<br>Lagrangian stochastic models are a largely used tool in the study of passive substances dispersion inside the Atmospheric Boundary Layer. Its application is related to the trajectory computation of thousands of particles, that numerically simulate the dispersion of suspense substances in the atmosphere. In this study, the basic concepts related to the Lagrangian stochastic modelling are presented and discu

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18

Kasnakoglu, Cosku. "Reduced order modeling, nonlinear analysis and control methods for flow control problems." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1195629380.

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19

LAN, CHENG-YANG, and 藍成陽. "Turbulent boundary layer diffusion flames:effects of probability density function." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/08267106797586692769.

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20

Sen, Shoham. "Simulation and Study of Noise Generated due to Turbulent Boundary Layer in Towed Hydrophone Array." Thesis, 2016. https://etd.iisc.ac.in/handle/2005/4331.

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In this thesis, a wave propagation based analytical model is developed for an underwater towed array. The towed array is modeled as an in finite tube filled with a certain liquid and submerged in an in finite volume of water. This tube is excited by turbulent boundary layer (TBL) excitation which is modeled using both the Corcos and the Chase models. The acoustic response (self-noise) of the towed array is found using the transfer function of the tube and the PSD of the turbulent excitation. The acoustic response spectrum is compared with the results from the literature. This happens to be th

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21

Zhang, Zheng. "Observational and Numerical Modeling Studies of Turbulence on the Texas-Louisiana Continental Shelf." Thesis, 2013. http://hdl.handle.net/1969.1/151031.

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Turbulent dynamics at two sites (C and D) in a hypoxic zone on the Texas- Louisiana continental shelf were studied by investigating turbulence quantities i.e. turbulence kinetic energy (TKE), dissipation rate of TKE (E), Reynolds stress (τ ), dissipation rate of temperature variance (χ), eddy diffusivity of temperature (ν't), and eddy diffusivity of density (ν'p). Numerical models were also applied to test their capability of simulating these turbulence quantities. At site D, TKE, E, and τ were calculated from velocity measurements in the bot- tom boundary layer (BBL), using the Kolmogo

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