Coherent Structures
Mostrando 1-12 de 57 artigos, teses e dissertações.
-
1. QUANTIFICAÇÃO DE MULLITA PROVENIENTE DE RESÍDUOS DE CAULIM DA REGIÃO AMAZÔNICA: USO DO MÉTODO DE RIETVELD
Mullite is used to obtain a refractory material, there are several factors that influence the synthesis process of mullite: the preparation of the mixture, the precipitation and the reaction of SiO2 and Al2O3. For the synthesis of mullite, samples of kaolin processing residues were used as precursor material, because it presents SiO2 and Al2O3 in its composi
Quím. Nova. Publicado em: 2021-04
-
2. A computational framework for predicting onset and crack propagation in composite structures via eXtended Finite Element Method (XFEM)
Abstract The eXtended Finite Element Method (XFEM) has been reliably used for analyzing crack growth in 3D structural elements over last years. In fact, many researchers have worked in this field, but it is scarce to find scientific contributions about 3D XFEM models applied to the failure of non-standard composite parts, such as tapered structures and thick
Lat. Am. j. solids struct.. Publicado em: 29/10/2018
-
3. Investigation of persistent coherent structures along the Southern Brazilian Shelf
Resumo Dentre as diferentes influências que a hidrodinâmica da plataforma continental sul brasileira sofre, uma de destaque é a pluma de água proveniente da Lagoa dos Patos, gerando no seu entorno uma região com elevada complexidade na dinâmica do escoamento. Além disto, ventos sazonais, sinóticos e variáveis, bem como as condições das correntes c
Braz. j. oceanogr.. Publicado em: 2018-06
-
4. A bilinear elastic constitutive model applied for midpalatal suture behavior during rapid maxillary expansion
Introduction : This study aims to evaluate the influence of the biomechanical behavior of the midpalatal suture (MPS) during the rapid maxillary expansion (RME) when modeled by the Finite Element Method. Methods Four simulation alternatives are discussed and, for each analysis, the suture is considered as a functional unit with a different mechanical behavi
Res. Biomed. Eng.. Publicado em: 27/11/2015
-
5. Coherent structures in wall-bounded turbulence
A dificuldade intrínseca à compreensão da turbulência em fluidos estimulou o uso de diferentes metodologias para o tratamento deste problema. Algumas abordagens mostraram-se mais promissoras que outras, mas todas padecem por focar somente em parte do amplo espectro do problema. Uma forma bem sucedida de modelar a turbulência consiste em decompor a estru
An. Acad. Bras. Ciênc.. Publicado em: 09/06/2015
-
6. A limitação da responsabilidade das sociedades empresárias agrupadas em redes de cooperação empresarial: as associações de interesse econômico do estado do Rio Grande do Sul
There is a new associative mechanism in Brazil referred to as a Business Cooperation Network (BCN) that has come to be utilized more and more frequently. BCNs consist of a clustering of small or middle-sized business entities that come together with the objective of the joint development of some activity that are common to all of them. This is achieved throu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/09/2012
-
7. Occurrence of Defects in Laser Beam Welded Al-Cu-Li Sheets with T-Joint Configuration
Abstract: In the aerospace industry, laser beam welding has been considered as one of the most promising routes among the new manufacturing processes. Substitution of riveting by laser beam welding of aircraft structures has contributed to weight and cost savings. Concurrently, new aluminum alloys have been developed with the addition of lithium with better
J. Aerosp. Technol. Manag.. Publicado em: 2012-12
-
8. Edge structures and turbulence in space plasmas / Estruturas de fronteira e turbulência em plasmas espaciais
Neste trabalho foi investigada uma série de problemas físicos não-lineares relevantes para o ambiente espacial, baseando-se tanto em dados observacionais quanto numa abordagem de sistemas dinâmicos. Primeiro, foi estudada a relação entre as lâminas de corrente, a turbulência e a reconexão magnética na borda frontal de uma ejeção de massa coronal
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/09/2011
-
9. Synchronization in intermittent turbulence and spatiotemporal chaos in the solar-terrestrial environment / Sincronização em turbulência intermitente e caos espaço-temporal no ambiente solar-terrestre
In this work we analyze synchronization due to multiscale interactions in observations of intermittent turbulence and numerical simulations of spatiotemporal intermittency in neutral fluids and space plasmas. This study is carried out in two parts. First, we apply two distinct nonlinear techniques, kurtosis and phase coherence index, to measure the degree of
Publicado em: 2010
-
10. Synchronization in intermittent turbulence and spatiotemporal chaos in the solar-terrestrial environment / Sincronização em turbulência intermitente e caos espaço-temporal no ambiente solar-terrestre
In this work we analyze synchronization due to multiscale interactions in observations of intermittent turbulence and numerical simulations of spatiotemporal intermittency in neutral fluids and space plasmas. This study is carried out in two parts. First, we apply two distinct nonlinear techniques, kurtosis and phase coherence index, to measure the degree of
Publicado em: 2010
-
11. OS CUSTOS DE TRANSAÇÃO DA CADEIA PRODUTIVA DO BIODIESEL À BASE DE SOJA NO RIO GRANDE DO SUL: IMPACTOS SOBRE A GESTÃO DAS CADEIAS DE SUPRIMENTOS DAS USINAS INSTALADAS / THE TRANSACTION COSTS OF THE PRODUCTIVE CHAIN OF THE BIODIESEL BASED ON SOYBEAN IN RIO GRANDE DO SUL: IMPACTS ON THE MANAGEMENT OF SUPPLY CHAINS OF PLANTS INSTALLED
This research aims to identify and assess the main sources of transaction costs of the productive chain of soy biodiesel in Rio Grande do Sul and how they affect the management of supply chains of organizations. To do so, proceeded with semi-structured interviews and visits to four plants in operation in Rio Grande do Sul state. It is diagnosed that the main
Publicado em: 2010
-
12. Comparisons between two wavelet functions in extracting coherent structures from solar wind time series
Nowadays, wavelet analysis of turbulent flows have become increasingly popular. However, the study of geometric characteristics from wavelet functions is still poorly explored. In this work we compare the performance of two wavelet functions in extracting the coherent structures from solar wind velocity time series. The data series are from years 1996 to 200
Brazilian Journal of Physics. Publicado em: 2009-03