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Dissertations / Theses on the topic 'Turbulent Scaling Laws'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Kishi, Tatsuro. "Scaling laws for turbulent relative dispersion in two-dimensional energy inverse-cascade turbulence." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263445.

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2

Donzis, Diego Aaron. "Scaling of turbulence and turbulent mixing using Terascale numerical simulations." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19794.

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Fundamental aspects of turbulence and turbulent mixing are investigated using direct numerical simulations (DNS) of stationary isotropic turbulence, with Taylor-scale Reynolds numbers ranging from 8 to 650 and Schmidt numbers from 1/8 to 1024. The primary emphasis is on important scaling issues that arise in the study of intermittency, mixing and turbulence under solid-body rotation. Simulations up to 2048^3 in size have been performed using large resource allocations on Terascale computers at leading supercomputing centers. Substantial efforts in algorithmic development have also been unde

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3

Gauding, Michael [Verfasser]. "Statistics and scaling laws of turbulent scalar mixing at high Reynolds numbers / Michael Gauding." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2014. http://d-nb.info/105834966X/34.

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4

Schäfer, Philip Morten [Verfasser]. "Statistics, Geometries and Scaling Laws of Streamlines and Streamline Segments in Turbulent Flows / Philip Morten Schäfer." Aachen : Shaker, 2013. http://d-nb.info/105157398X/34.

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5

Joseph, Liselle AnnMarie. "Pressure Fluctuations in a High-Reynolds-Number Turbulent Boundary Layer over Rough Surfaces of Different Configurations." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/79630.

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The pressure fluctuations under a high Reynolds Number, rough-wall, turbulent, boundary layer have been studied in the Virginia Tech Stability Wind Tunnel. Rough surfaces of varying element height (1-mm, 3-mm), shape (hemispheres, cylinders) and spacing (5.5-mm, 10.4-mm, 16.5-mm) were investigated in order to ascertain how the turbulent pressure fluctuations change with changes in roughness geometry. Rough surfaces which contain two types of elements are investigated and relationships between the combination surface and the individual surfaces have been uncovered. Measurements of the wall pres

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6

Stella, Francesco. "Caractérisation d’un décollement turbulent sur une rampe : entraînement et lois d’échelle." Thesis, Orléans, 2017. http://www.theses.fr/2017ORLE2043/document.

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Les décollements turbulents massifs sont des phénomènes communs qui peuvent causer des pertes et de nuisances aérodynamiques importantes dans les écoulements industriels, par exemple à l’arrière d’une aile d’avion. Ce travail contribue à leur compréhension par l’analyse phénoménologique d’un décollement turbulent, représentatif d’un grand nombre d’écoulements réels. Le premier objectif est d’identifier les lois d’échelle des décollements turbulents, notamment en rapport avec les caractéristiques de l’écoulement à l’amont de la rampe. Un deuxième objectif est l’analyse, à grande et à petite éch

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7

Marino, Raffaele. "Scaling laws in solar wind turbulence." Nice, 2009. http://www.theses.fr/2009NICE4104.

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Dans ma thèse de doctorat, je dérive la loi de Yaglom pour la magnétohydrodynamique, une relation de proportionnalité entre le moment mixte d’ordre 3 des incréments longitudinaux des variables d’Elsässer et l’échelle de ces incréments. En utilisant des mesures de la sonde spatiale Ulysses, j’ai montré pour la première fois la validité de cette relation, démontrant ainsi l’existence d’une cascade turbulente d’énergie et la nature turbulente des fluctuations de vitesse et champ magnétique dans les plasmas magnétisés. La relation de Yaglom pour la MHD permet aussi la première estimation directe d

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8

Marchand, Muriel. "Propriétés statistiques des petites structures dans les écoulements turbulents : influence du nombre de Reynolds sur l'intermittence." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0138.

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Une etude experimentale du champ de vitesse et de temperature (consideree comme un scalaire passif) a ete realisee dans divers ecoulements pleinement turbulents (jet, turbulence de grille, soufflerie s1 de l'onera), pour une large gamme de nombres de reynolds. En ce qui concerne la vitesse, des outils statistiques tels que la representation spectrale de l'energie, les densites de probabilite globales et conditionnelles, ou les moments des fonctions de structure, ont permis de mettre en evidence le role determinant du taux de transfert d'energie dans l'intermittence en turbulence tridimensionne

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9

Bouaniche, Alexandre. "A hybrid stochastic-sectional method for the simulation of soot particle size distributions Vitiated high karlovitz n-decane/air turbulent flames: scaling laws and micro-mixing modeling analysis A hybrid stochastic/fixed-sectional method for solving the population balance equation." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMIR23.

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Les particules de suie (qui sont un type de particules ultrafines) peuvent être produites et émises dans des conditions de combustion riche. Les secteurs comme les transports (routier et aérien), où l'industrie sont des contributeurs significatifs aux émissions de particules. Celles-ci sont habituellement considérées comme des polluants dans la mesure où leur impact négatif sur la santé a été mesuré. Dans certains cas spécifiques comme la production de nanomatériaux, elles peuvent être synthétisées de manière volontaire. Dans les deux cas, une compréhension précise et une capabilité de prédict

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10

Seis, Christian. "Scaling laws in two models for thermodynamically driven fluid flows." Doctoral thesis, Universitätsbibliothek Leipzig, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-81228.

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In this thesis, we consider two models from physics, which are characterized by the interplay of thermodynamical and fluid mechanical phenomena: demixing (spinodal decomposition) and Rayleigh--Bénard convection. In both models, we investigate the dependencies of certain intrinsic quantities on the system parameters. The first model describes a thermodynamically driven demixing process of a binary viscous fluid. During the evolution, the two components of the mixture separate into two domains of the different equilibrium volume fractions. One observes a clear tendency: Larger domains grow at t

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11

Naert, Antoine. "Turbulence dans un jet d'hélium gazeux à basse température." Université Joseph Fourier (Grenoble ; 1971-2015), 1995. http://www.theses.fr/1995GRE10009.

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Il est apparu recemment que la turbulence accessible a l'experience pouvait ne pas avoir atteint, meme aux plus grand nombres de reynolds (re), un regime ultime (reynolds infini) qui avait jusque-la fait l'objet de predictions theoriques. L'experience presentee ici est un jet d'helium gazeux a 4,2 k. A cette temperature proche de la temperature critique, modifier la pression du fluide permet de faire varier la viscosite, et donc le reynolds sur une large gamme (re=10#3 a 10#5) sans que la geometrie de l'ecoulement ne soit modifiee. Nous mesurons avec une haute resolution statistique les fluctu

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12

Rosteck, Andreas M. [Verfasser], Martin [Akademischer Betreuer] Oberlack, and Amsini [Akademischer Betreuer] Sadiki. "Scaling Laws in Turbulence - A Theoretical Approach Using Lie-Point Symmetries / Andreas M. Rosteck. Betreuer: Martin Oberlack ; Amsini Sadiki." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2014. http://d-nb.info/1110901445/34.

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13

Repasky, Russell James. "Turbulent Boundary Layers over Rough Surfaces: Large Structure Velocity Scaling and Driver Implications for Acoustic Metamaterials." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/90796.

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Turbulent boundary layer and metamaterial properties were explored to initiate the viability of controlling acoustic waves driven by pressure fluctuations from flow. A turbulent boundary layer scaling analysis was performed on zero-pressure-gradient turbulent boundary layers over rough surfaces, for 30,000≤〖Re〗_θ≤100,000. Relationships between fluctuating pressures and velocities were explored through the pressure Poisson equation. Certain scaling laws were implemented in attempts to collapse velocity spectra and turbulence profiles. Such analyses were performed to justify a proper scaling of

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14

Chanal, Olivier. "Vers les échelles dissipatives dans un jet d'hélium gazeux à basse température." Grenoble INPG, 1998. http://www.theses.fr/1998INPG0019.

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L'utilisation de l'helium gazeux vers 4,2 k nous permet d'etudier la turbulence developpee a fort nombre de reynolds dans un jet de dimension reduite. La variation controlee de la pression du fluide donne acces a une tres large gamme de reynolds, entre 10#3 et 10#6. En contrepartie, les echelles caracteristiques de dissipation de l'energie peuvent atteindre le micrometre. Afin de caracteriser les plus petites structures presentes au sein de l'ecoulement, nous avons etudie et developpe un anemometre-thermometre de taille micronique et non perturbatif vis a vis de l'ecoulement. Ce detecteur est

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15

Tchéou, Jean-Marcel. "Analyse statistique multifractale en turbulence développée et application à la finance." Cachan, Ecole normale supérieure, 1997. http://www.theses.fr/1997DENS0026.

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Cette thèse est consacrée à l'étude statistique (densité de probabilité et moments) des accroissements des variables d'état pour des systèmes présentant des lois d'échelle multifractales. A l'aide de la méthode du col, nous montrons qu'il existe dans ce cas une double relation asymptotique explicite et locale qui permet d'exprimer les densités de probabilité en fonction des moments et réciproquement. Les termes dominants (exponentiels) de la double asymptotique s'écrivent sous la forme d'une transformée de Legendre identique a celle du modèle de Parisi-Frisch. Cette asymptotique permet de reco

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16

Welter, Guilherme Sausen. "Leis de escala e análise do fenômeno de intermitência em turbulência bem desenvolvida." Universidade Federal de Santa Maria, 2010. http://repositorio.ufsm.br/handle/1/3913.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>This study presents a review of the statistical theory for the inertial range of welldeveloped turbulent flows. The main focus of the study is on the experimental estimation of the so called intermittency exponent through recently developed statistical methods and its possible dependence on large scale mechanisms. The analysis employed allows to observe that even in very high Reynolds number, as those occurring in atmospheric boundary layer flows, clear scaling laws (power laws) are never observed in the inertial range. Comparing

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17

Ayet, Alex. "Flux de quantité de mouvement à l'interface air-mer : approche théorique du couplage entre turbulence et vagues de vent On the Impact of Long Wind-Waves on Near-Surface Turbulence and Momentum Fluxes, in Boundary-Layer Meteorology volume 174, March 2020 Scalewise return to isotropy in stratified boundary layer flows, in JGR Atmospheres 125 (16), August 2020 Scaling laws for the length scale of energy‐containing eddies in a sheared and thermally stratified atmospheric surface layer, in Geophysical Research Letters 47(23), December 2020." Thesis, Brest, 2020. http://www.theses.fr/2020BRES0038.

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Malgré de nombreuses études, le lien de causalité entre vent et vagues fait toujours l’objet de controverses : cela est dû entre autres au caractère multi-échelle d'une surface océanique réaliste, et à la présence de déferlements, qui modifient radicalement sa topologie. Dans cette thèse, ces deux questions sont abordées sous un angle théorique, à travers un modèle phénoménologique, qui relie les propriétés spectrales et moyennées de la turbulence proche de paroi en utilisant la géométrie de tourbillons attachés à celle-ci. La première partie de la thèse revisite ce modèle phénoménologique en

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18

Pawar, Shashikant S. "Axially Homogeneous Turbulent Convection at High Rayleigh Numbers : Scaling Laws for Flux and Spectra." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/3642.

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Natural turbulent convection studies encompass a wide range of flows occurring in nature, for example, atmospheric and oceanic flows, con-vection in the Earth’s mantle, convection in the stars and also in many engineering applications. Rayleigh-Benard convection (RBC), i.e. con-vection in a horizontal fluid layer confined between two plates with a temperature diﬀerential maintained across them, has been a proto-type problem in the studies of turbulent natural convection. Many small scale and global features of the flow in the turbulent regime of RBC are known, yet the flow dynamics is not full

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19

Pawar, Shashikant S. "Axially Homogeneous Turbulent Convection at High Rayleigh Numbers : Scaling Laws for Flux and Spectra." Thesis, 2015. http://etd.iisc.ernet.in/2005/3642.

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Natural turbulent convection studies encompass a wide range of flows occurring in nature, for example, atmospheric and oceanic flows, con-vection in the Earth’s mantle, convection in the stars and also in many engineering applications. Rayleigh-Benard convection (RBC), i.e. con-vection in a horizontal fluid layer confined between two plates with a temperature diﬀerential maintained across them, has been a proto-type problem in the studies of turbulent natural convection. Many small scale and global features of the flow in the turbulent regime of RBC are known, yet the flow dynamics is not full

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20

Marino, Raffaele, Giovanni Falcone, Vincenzo Carbone, Alain Noullez, and Salvo Luca Sorriso. "Scaling laws in solar wind turbulence." Thesis, 2009. http://hdl.handle.net/10955/626.

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21

Seis, Christian. "Scaling laws in two models for thermodynamically driven fluid flows." Doctoral thesis, 2011. https://ul.qucosa.de/id/qucosa%3A11319.

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In this thesis, we consider two models from physics, which are characterized by the interplay of thermodynamical and fluid mechanical phenomena: demixing (spinodal decomposition) and Rayleigh--Bénard convection. In both models, we investigate the dependencies of certain intrinsic quantities on the system parameters. The first model describes a thermodynamically driven demixing process of a binary viscous fluid. During the evolution, the two components of the mixture separate into two domains of the different equilibrium volume fractions. One observes a clear tendency: Larger domains grow at t

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22

Rosteck, Andreas M. "Scaling Laws in Turbulence - A Theoretical Approach Using Lie-Point Symmetries." Phd thesis, 2014. http://tuprints.ulb.tu-darmstadt.de/4009/1/Rosteck_Scaling%20Laws%20in%20Turbulence.pdf.

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In the present work, scaling laws for special turbulent flow phenomena are investigated using a mathematical method based on Lie-point symmetries. Moreover, the theoretical results are compared to available DNS data. At first, a set of governing partial differential equations (PDEs), here the multi-point correlation equations, is introduced, describing a turbulent flow of a Newtonian fluid with constant density. Lie-point symmetries, which represent transformations of functions and variables leaving the form of a differential equation unchanged, are determined for this set of differential e

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23

GUALTIERI, Paolo. "Effect of constant mean gradients on scaling laws in homogeneous turbulence." Doctoral thesis, 2001. http://hdl.handle.net/11573/387907.

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24

Howell, James Frederick. "The influence of small scale variability on scaling relationships describing atmospheric turbulence." Thesis, 1993. http://hdl.handle.net/1957/28775.

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The statistics describing variations of turbulent motions within the so called inertial range of length scales depend on the scale over which the motions are varying and the "average" rate at which the turbulent kinetic energy is being dissipated on the molecular scale. This hypothesis stemmed from the similarity arguments published by A. N. Kolmogorov in 1941 and implies specific scaling relations between the average amplitude and length scale of turbulent motions. Turbulent motions agree to a good approximation with Kolmogorov scaling provided the fluid flow admits to the underlying assumpti

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25

Pu, Jaan H. "Turbulence modelling of shallow water flows using Kolmogorov approach." 2015. http://hdl.handle.net/10454/8322.

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Yes<br>This study uses an improved k –ε coupled shallow water equations (SWE) model that equipped with the numerical computation of the velocity fluctuation terms to investigate the turbulence structures of the open channel flows. We adapted the Kolmogorov K41 scaling model into the k –ε equations to calculate the turbulence intensities and Reynolds stresses of the SWE model. The presented model was also numerically improved by a recently proposed surface gradient upwind method (SGUM) to allow better accuracy in simulating the combined source terms from both the SWE and k –ε equations as pr

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