subject:(Dissipation Scales)

1. CARLOS EDUARDO KRASSINSKI SOARES. METODO DAS ESCALAS MULTIPLAS NA CONVERSÃO E AMPLIFICAÇÃO PARAMÉTRICA DE DOIS MODOS.

Degree: 2010, UNIVERSIDADE ESTADUAL DE PONTA GROSSA

URL: http://www.bicen-tede.uepg.br/tde_busca/arquivo.php?codArquivo=623

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Nesta dissertação, estudam-se propriedades físicas de um sistema aberto, composto por dois modos bosonicos interagentes (osciladores harmônicos quânticos) de frequências distintas, com o acoplamento explicitamente… (more)

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Nesta dissertação, estudam-se propriedades físicas de um sistema aberto, composto por dois modos bosonicos interagentes (osciladores harmônicos quânticos) de frequências distintas, com o acoplamento explicitamente dependente do tempo. Assume-se cada um dos modos bosônicos sob efeito de reservatórios téermicos e analisa-se a dinâmica de suas propriedades quânticas. Em se tratando de sistemas quadraticos e estados iniciais Gaussianos, determina-se a evolução ao temporal das propriedades dos modos acoplados a partir da evolução ao temporal dos momentos de segunda ordem não o simetrizados na formulação de sistemas quadraticos de evolucção não unitária. As propriedades dinamicas são o determinadas solucionando-se sistemas de equacões diferenciais para os segundos momentos não simetrizados. Sendo sistemas de equções diferenciais com coeficientes dependentes do tempo, no limite do acoplamento fraco, aplica-se o Método das Escalas Múltiplas para a construção e a resolução das equações diferenciais, determinando-se suas soluções em séries perturbativas em um parâmetro adequado, associado as ordens de grandeza dos acoplamentos. Dessa maneira, analisa-se a dinâmica da medida de compressão e da pureza para os casos da amplificação e conversão paramétrica para diferentes valores de parâmetros de estados iniciais. Neste contexto, considera-se também o problema da medida quantitativa do emaranhamento, analisando seu comportamento para diferentes conjuntos de parametros do sistema e configurações de estados iniciais Gaussianos.

In this dissertation, we study the physical properties of an open system, composed of two interacting bosonic modes (quantum harmonic oscillators) of different frequencies, with a explicitly time dependent coupling. It is assumed that each of the bosonic modes is under the effect of a thermal reservoir and the dynamics of their quantum properties is studied. In the case of quadratic systems and Gaussian initial states, the quantum properties of the coupled modes evolve in time according to the time evolution of the non-symmetrized second order moment which is described in the framework of the non-unitary evolution of quantum quadratic systems. The dynamical properties are determined by solving systems of differential equations for the second moments. These systems of differential equations have time-dependent coefficients and in the limit of weak coupling, the Method of Multiple Scales for constructing and solving differential equations is applied. This approach determines the differential equations solutions in a perturbative series of an appropriate parameter associated with orders of magnitude of the couplings. In this way it is obtained a description of the temporal behavior of the squeezing and the purity for each mode in the particular cases of parametric amplification and conversion. In this context, it is also considered the problem of the quantitative measure of entanglement, analyzing its dynamical behavior for different values of the system parameters and Gaussian initial states configurations.

Advisors/Committee Members: Fernando Luis Semião da Silva, Marcos Cesar de Oliveira, Antonio Sérgio Magalhães de Castro.

Subjects/Keywords: emaranhamento; dissipação; compressão; equações diferenciais; método das escalas múltiplas.; entanglement; dissipation; squeezing; differential equations; method of multiple scales; FISICA

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

SOARES, C. E. K. (2010). METODO DAS ESCALAS MULTIPLAS NA CONVERSÃO E AMPLIFICAÇÃO PARAMÉTRICA DE DOIS MODOS. (Thesis). UNIVERSIDADE ESTADUAL DE PONTA GROSSA. Retrieved from http://www.bicen-tede.uepg.br/tde_busca/arquivo.php?codArquivo=623

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

SOARES, CARLOS EDUARDO KRASSINSKI. “METODO DAS ESCALAS MULTIPLAS NA CONVERSÃO E AMPLIFICAÇÃO PARAMÉTRICA DE DOIS MODOS.” 2010. Thesis, UNIVERSIDADE ESTADUAL DE PONTA GROSSA. Accessed January 18, 2021. http://www.bicen-tede.uepg.br/tde_busca/arquivo.php?codArquivo=623.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

SOARES, CARLOS EDUARDO KRASSINSKI. “METODO DAS ESCALAS MULTIPLAS NA CONVERSÃO E AMPLIFICAÇÃO PARAMÉTRICA DE DOIS MODOS.” 2010. Web. 18 Jan 2021.

Vancouver:

SOARES CEK. METODO DAS ESCALAS MULTIPLAS NA CONVERSÃO E AMPLIFICAÇÃO PARAMÉTRICA DE DOIS MODOS. [Internet] [Thesis]. UNIVERSIDADE ESTADUAL DE PONTA GROSSA; 2010. [cited 2021 Jan 18]. Available from: http://www.bicen-tede.uepg.br/tde_busca/arquivo.php?codArquivo=623.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

SOARES CEK. METODO DAS ESCALAS MULTIPLAS NA CONVERSÃO E AMPLIFICAÇÃO PARAMÉTRICA DE DOIS MODOS. [Thesis]. UNIVERSIDADE ESTADUAL DE PONTA GROSSA; 2010. Available from: http://www.bicen-tede.uepg.br/tde_busca/arquivo.php?codArquivo=623

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Kentucky

2. Alhamdi, Sabah Falih Habeeb. INTERMITTENCY EFFECTS ON THE UNIVERSALITY OF LOCAL DISSIPATION SCALES IN TURBULENT BOUNDARY LAYER FLOWS WITH AND WITHOUT FREE-STREAM TURBULENCE.

Degree: 2018, University of Kentucky

URL: https://uknowledge.uky.edu/me_etds/116

► Measurements of the small-scale dissipation statistics of turbulent boundary layer flows with and without free-stream turbulence are reported for Reτ ≈ 1000 (Reθ ≈ 2000).… (more)

▼ Measurements of the small-scale dissipation statistics of turbulent boundary layer flows with and without free-stream turbulence are reported for Reτ ≈ 1000 (Reθ ≈ 2000). The scaling of the dissipation scale distribution is examined in these two boundary conditions of external wall-bounded flow. Results demonstrated that the local large-scale Reynolds number based on the measured longitudinal integral length-scale fails to properly normalize the dissipation scale distribution near the wall in these two free-stream conditions, due to the imperfect characterization of the upper bound of the inertial cascade by the integral length-scale. When a length-scale based on Townsend's attached-eddy hypothesis is utilized to describe the local large-scale Reynolds number near the wall, the description of the Reynolds number scaling was determined to be significantly improved and agreed with that found in homogeneous, isotropic turbulence. However, the scaling based on Townsend's attached-eddy hypothesis agreed best for the lowest 40% of the boundary layer thickness and then it degraded due to the loss of the validity of the attached eddy-hypothesis and the onset of external intermittency. A surrogate large-scale found from turbulent kinetic energy and mean dissipation rate improved the scaling of the dissipation scales, relative to the measured integral length-scale. The probability density functions of the local dissipation scales were calculated. When the three local large-scale Reynolds numbers are used for normalization, the one based on the longitudinal integral length-scale and the one based on the length-scale of attached-eddy hypothesis provide support for the existence of a universal distribution of the local dissipation scales up to the edge of the outer region of the turbulent boundary layer, which scales differently for inner and outer regions. However, the probability density functions of the local dissipation scales normalized by these two large-scale Reynolds numbers are deviated in interface locations for the flow without free-stream turbulence due to external intermittency. The surrogate large-scale provided the best agreement throughout the entire depth of the boundary layer. However, in the outer part of the boundary layer, a significantly reduced collapse in the scaled probability density functions was shown due to bias in the calculation introduced by the intermittent presence of laminar flow in the time series. To support that intermittency argument, injection of the free-stream turbulence was determined to improve the distribution of these normalized probability density functions in the intermittency locations for the flow regime without free-stream turbulence. In addition, unlike in channel flow, in the outer part of the turbulent boundary layer, the normalized distributions of the local dissipation scales were observed to be dependent on wall-normal position. This was found to be attributable to the presence of external intermittency in this outer part as the presence of free-stream turbulence was found…

Subjects/Keywords: Turbulence; Turbulent Boundary Layer; Dissipation Scales; External Intermittency; Free-Stream Turbulence; Turbulent/Non-Turbulent Interfaces; Aerodynamics and Fluid Mechanics; Complex Fluids; Mechanical Engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Alhamdi, S. F. H. (2018). INTERMITTENCY EFFECTS ON THE UNIVERSALITY OF LOCAL DISSIPATION SCALES IN TURBULENT BOUNDARY LAYER FLOWS WITH AND WITHOUT FREE-STREAM TURBULENCE. (Doctoral Dissertation). University of Kentucky. Retrieved from https://uknowledge.uky.edu/me_etds/116

Chicago Manual of Style (16^th Edition):

Alhamdi, Sabah Falih Habeeb. “INTERMITTENCY EFFECTS ON THE UNIVERSALITY OF LOCAL DISSIPATION SCALES IN TURBULENT BOUNDARY LAYER FLOWS WITH AND WITHOUT FREE-STREAM TURBULENCE.” 2018. Doctoral Dissertation, University of Kentucky. Accessed January 18, 2021. https://uknowledge.uky.edu/me_etds/116.

MLA Handbook (7^th Edition):

Alhamdi, Sabah Falih Habeeb. “INTERMITTENCY EFFECTS ON THE UNIVERSALITY OF LOCAL DISSIPATION SCALES IN TURBULENT BOUNDARY LAYER FLOWS WITH AND WITHOUT FREE-STREAM TURBULENCE.” 2018. Web. 18 Jan 2021.

Vancouver:

Alhamdi SFH. INTERMITTENCY EFFECTS ON THE UNIVERSALITY OF LOCAL DISSIPATION SCALES IN TURBULENT BOUNDARY LAYER FLOWS WITH AND WITHOUT FREE-STREAM TURBULENCE. [Internet] [Doctoral dissertation]. University of Kentucky; 2018. [cited 2021 Jan 18]. Available from: https://uknowledge.uky.edu/me_etds/116.

Council of Science Editors:

Alhamdi SFH. INTERMITTENCY EFFECTS ON THE UNIVERSALITY OF LOCAL DISSIPATION SCALES IN TURBULENT BOUNDARY LAYER FLOWS WITH AND WITHOUT FREE-STREAM TURBULENCE. [Doctoral Dissertation]. University of Kentucky; 2018. Available from: https://uknowledge.uky.edu/me_etds/116

3. Kokoszka, Florian. Estimations du mélange vertical le long de sections hydrologiques en Atlantique Nord : Vertical mixing estimates along hydrological sections en Atlantique Nord in North Atlantic.

Degree: Docteur es, Océanographie physique, 2012, Brest

URL: http://www.theses.fr/2012BRES0097

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Le mélange vertical dans l’océan contribue au maintien de la Cellule Méridienne de Circulation Océanique (MOC) en permettant le renouvellement des eaux profondes. Une coupe… (more)

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Le mélange vertical dans l’océan contribue au maintien de la Cellule Méridienne de Circulation Océanique (MOC) en permettant le renouvellement des eaux profondes. Une coupe transverse d’une partie de la MOC est réalisée par la radiale hydrologique OVIDE qui a lieu tous les 2 ans depuis 2002 entre le Portugal et le Groenland. L’énergie nécessaire au mélange est fournie par les ondes internes générées par le vent et la marée, et des mesures de micro-structure (VMP) en 2008 montrent des valeurs de dissipation Evmp intensifiées dans la thermocline principale et au niveau des topographies. Notre étude se base sur ces observations pour étudier la fine-structure verticale de l’océan et estimer indirectement la dissipation E due aux ondes internes à l’aide de mesures CTD et LADCP. La comparaison au mesures du VMP permet d’optimiser la paramétrisation de E en encadrant les observations par facteur 3 et leurs valeurs moyennes à ±30%. L’application sur l’ensemble des données OVIDE permet d’obtenir une cartographie du mélange a travers le bassin. La distribution géographique de la diffusion verticale K est similaire le long des 5 sections, avec des valeurs de l’ordre de 10−4m2/s dans la thermocline principale, au fond et au niveau des topographies, et de l’ordre de 10−5m2/s dans l’océan intérieur. Des différences régionales sont présentes et K peut être localement proche de 10−3m2/s. L’étude de la section FOUREX 1997 révèle une intensification de K le long de la dorsale médio-Atlantique où les valeurs moyennes sont de 2 à 3 plus fortes que le long des sections OVIDE. La distribution spatiale des échelles de Thorpe LT est corrélée avec celle du mélange. Néanmoins la dissi-pation basée sur LT surestime Evmp d’un facteur 10 à100, ce qui pourrait être dû à une mauvaise représentation de la durée de vie de la turbulence dans l’océan. Certains mécanismes susceptibles de générer des ondes internes sont proposés. Des sites possibles de génération par la marée sont localisés à l’aide d’un modèle simple de la trajectoire des rayons d’ondes. Une corrélation possible entre les mouvements géostrophiques et les ondes internes est envisagée dans la thermocline principale. Enfin l’étude des angles de Turner montre que des instabilités de double-diffusion peuvent être présentes sur une grande partie de la section.

Vertical mixing in the ocean contributes to sustain the Meridionnal Overturning. Circulation (MOC) by allowing the renewal of deep waters. A section across the MOC is performed by the hydrological radial OVIDE repeated every two years between Portugal and Greenland since 2002. The energy required for mixing is provided by internal waves generated by wind and tides and micro-structure measurements(VMP) in 2008 show intensified values of dissipation Evmp in the main thermocline and near topographies. Our study is based on these observations and aims tostudy the vertical fine-scale structure of the ocean. Estimates of the dissipation E due to internal waves are made with CTD and LADCP measurements. The comparison with VMP measurements…

Advisors/Committee Members: Mercier, Herlé (thesis director), Ferron, Bruno (thesis director).

Subjects/Keywords: Atantique Nord; Section Hydrologique; Analyse de données; Ondes Internes; Echelles de Thorpe; Modèle de Garrett et Munk; Turbulence; Mélange vertical; Dissipation; Finestructure; Microstructure; Paramétrisations; Topographie; North Atlantic; Hydrological Section; Data Analysis; InternalWaves; Thorpe Scales; Garrett and Munk Model; Turbulence; Vertical Mixing; Dissipation; Fine-structure; Micro-structure; Parameterizations; Topography

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kokoszka, F. (2012). Estimations du mélange vertical le long de sections hydrologiques en Atlantique Nord : Vertical mixing estimates along hydrological sections en Atlantique Nord in North Atlantic. (Doctoral Dissertation). Brest. Retrieved from http://www.theses.fr/2012BRES0097

Chicago Manual of Style (16^th Edition):

Kokoszka, Florian. “Estimations du mélange vertical le long de sections hydrologiques en Atlantique Nord : Vertical mixing estimates along hydrological sections en Atlantique Nord in North Atlantic.” 2012. Doctoral Dissertation, Brest. Accessed January 18, 2021. http://www.theses.fr/2012BRES0097.

MLA Handbook (7^th Edition):

Kokoszka, Florian. “Estimations du mélange vertical le long de sections hydrologiques en Atlantique Nord : Vertical mixing estimates along hydrological sections en Atlantique Nord in North Atlantic.” 2012. Web. 18 Jan 2021.

Vancouver:

Kokoszka F. Estimations du mélange vertical le long de sections hydrologiques en Atlantique Nord : Vertical mixing estimates along hydrological sections en Atlantique Nord in North Atlantic. [Internet] [Doctoral dissertation]. Brest; 2012. [cited 2021 Jan 18]. Available from: http://www.theses.fr/2012BRES0097.

Council of Science Editors:

Kokoszka F. Estimations du mélange vertical le long de sections hydrologiques en Atlantique Nord : Vertical mixing estimates along hydrological sections en Atlantique Nord in North Atlantic. [Doctoral Dissertation]. Brest; 2012. Available from: http://www.theses.fr/2012BRES0097

4. Muñoz Blanc, Carlos. Simulación físico-matemática de las turbulencias en los incendios de edificación. Propuesta de una nueva metodología de análisis relativa a la verificación cualitativa de las turbulencias simuladas.

Degree: Departament d'Estructures a l'Arquitectura, 2014, Universitat Politècnica de Catalunya

URL: http://hdl.handle.net/10803/145388

► In the European Union, and more specifically in Spain, the analysis of the effect of fire on any building remains an isolated and unusual fact,… (more)

Subjects/Keywords: Computational fluid dynamics; Fire simulation; Large Eddy simulation; Navier-Stokes; Kolmogorov scales; Kinetic energy dissipation; Reynolds number; Direct numerical simulation; Smagorinsky; Spectral analysis; 536; 624; 72

…Direct Numerical Simulation (D.N.S.), Kolmogorov Scales, Kinetic Energy dissipation…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Muñoz Blanc, C. (2014). Simulación físico-matemática de las turbulencias en los incendios de edificación. Propuesta de una nueva metodología de análisis relativa a la verificación cualitativa de las turbulencias simuladas. (Thesis). Universitat Politècnica de Catalunya. Retrieved from http://hdl.handle.net/10803/145388

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Muñoz Blanc, Carlos. “Simulación físico-matemática de las turbulencias en los incendios de edificación. Propuesta de una nueva metodología de análisis relativa a la verificación cualitativa de las turbulencias simuladas.” 2014. Thesis, Universitat Politècnica de Catalunya. Accessed January 18, 2021. http://hdl.handle.net/10803/145388.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Muñoz Blanc, Carlos. “Simulación físico-matemática de las turbulencias en los incendios de edificación. Propuesta de una nueva metodología de análisis relativa a la verificación cualitativa de las turbulencias simuladas.” 2014. Web. 18 Jan 2021.

Vancouver:

Muñoz Blanc C. Simulación físico-matemática de las turbulencias en los incendios de edificación. Propuesta de una nueva metodología de análisis relativa a la verificación cualitativa de las turbulencias simuladas. [Internet] [Thesis]. Universitat Politècnica de Catalunya; 2014. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/10803/145388.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Muñoz Blanc C. Simulación físico-matemática de las turbulencias en los incendios de edificación. Propuesta de una nueva metodología de análisis relativa a la verificación cualitativa de las turbulencias simuladas. [Thesis]. Universitat Politècnica de Catalunya; 2014. Available from: http://hdl.handle.net/10803/145388

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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