Piv
Mostrando 1-12 de 203 artigos, teses e dissertações.
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1. Simulação CFD e validação PIV do comportamento gás/líquido em um reator UASB
RESUMO Conforme a população mundial aumenta, a necessidade de desenvolvimento de sistemas de tratamento de efluentes mais eficientes requer o uso de novas tecnologias. O projeto e otimização de biorreatores e bioprocessos auxiliados por softwares têm se tornado uma questão de interesse, em especial devido ao avanço no estado da arte quando se trata de
Eng. Sanit. Ambient.. Publicado em: 2020-01
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2. PARTICLE IMAGE VELOCIMETRY FOR ESTIMATING THE YOUNG’S MODULUS OF WOOD SPECIMENS
ABSTRACT Proposing technological innovations in the investigation of the structure and behaviour of wood is important to optimize its use. The assimilation of methods diffused in other areas, such as particle image velocimetry (PIV), can allow a rich range of information for different aspects. The aim of this study was to estimate the Young’s modulus usin
CERNE. Publicado em: 09/09/2019
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3. ON THE PERFORMANCE OF DIFFERENT RANS BASED MODELS TO DESCRIBE THE TURBULENT FLOW IN AN AGITATED VESSEL USING NON-STRUCTURED GRIDS AND PIV VALIDATION
ABSTRACT The performances of the Standard κ-ε, RNG, Realizable, κ-ω and RSM turbulence models to describe the behavior of the flow in agitated tank reactors were evaluated. Because most of these tanks have complex geometries, structured meshing schemes are not a practical alternative in engineering. Two particular unstructured meshing schemes composed of
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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4. CARACTERIZAÇÃO QUÍMICA E AVALIAÇÃO DA CITOTOXICIDADE DE UM HETEROPOLISSACARÍDEO ISOLADO DA BIOMASSA DO Colletotrichum gloeosporioides
Colletotrichum gloeosporioides biomass was submitted to ethanolic extraction (78 ºC, 12 h) to remove low molecular weight compounds followed by hot aqueous extraction (100 ºC, 4 h, 4x) to obtain polysaccharides. Consecutive freezing/thawing treatments of the aqueous extract yielded a soluble fraction in cold water that was separated on five components (PI
Quím. Nova. Publicado em: 27/05/2019
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5. DISPLACEMENT MEASUREMENT IN SAWN WOOD AND WOOD PANEL BEAMS USING PARTICLE IMAGE VELOCIMETRY
ABSTRACT Throughout their useful life structures demand monitoring to verify their conditions of use. Thus, the need arises to seek methodologies capable to evaluate displacements and deformations in structural components of buildings. The objective of this research was to evaluate the use of the particle image velocimetry (PIV) technique to analyze test spe
CERNE. Publicado em: 20/05/2019
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6. Wind Tunnel Investigation of the Wind Patterns in the Launching Pad Area of the Brazilian Alcântara Launch Center
ABSTRACT This paper presents a wind tunnel study of the flow patterns in the main Brazilian Space Port, the Alcântara Launch Center (ALC), located in the Northwest region, over an irregular coastal cliff of 40 m height. In the ALC region, constant winds of strong incidence are very common, which can change the characteristics of the atmospheric boundary lay
J. Aerosp. Technol. Manag.. Publicado em: 14/01/2019
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7. Proper Orthogonal Decomposition and Spectral Analysis of a Wall-Mounted Square Cylinder Wake
ABSTRACT: The flow patterns over a finite square cylinder of aspect ratio of 3 were analyzed experimentally in a subsonic wind tunnel using the time-resolved particle image velocimetry (TR - PIV) techniques. The near wake flow structures and vortex shedding characteristics were investigated using mean flow analysis, spectral analysis and proper orthogonal de
J. Aerosp. Technol. Manag.. Publicado em: 03/05/2018
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8. ANALYSIS OF ELASTICITY IN WOODS SUBMITTED TO THE STATIC BENDING TEST USING THE PARTICLE IMAGE VELOCIMETRY (PIV) TECHNIQUE
ABSTRACT The most important parameter in terms of material mechanical behavior knowledge is the modulus of elasticity, being traditionally obtained through destructive tests. The objective of this study is the verification of the potential use of the particle image velocimetry technique (PIV) as a tool to obtain the modulus of elasticity in sawed wood sample
Eng. Agríc.. Publicado em: 2018-04
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9. Characterization of Vibrio cholerae isolates from 1976 to 2013 in Shandong Province, China
Abstract Cholera continues to be a serious public health issue in developing countries. We analyzed the epidemiological data of cholera from 1976 to 2013 in Shandong Province, an eastern coastal area of China. A total of 250 Vibrio cholerae isolates were selected for PCR analysis of virulence genes and pulsed-field gel electrophoresis (PFGE). The analysis of
Braz. J. Microbiol.. Publicado em: 2017-03
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10. Pré-incubação dos espermatozoides suínos diminui polispermia e aumenta a produção embrionária em oócitos de baixa qualidade
RESUMO: A principal causa da baixa eficiência na PIV de embriões suínos é a elevada taxa de polispermia, que é exacerbada em oócitos de baixa qualidade. O experimento 1 avaliou o desenvolvimento embrionário de oócitos de baixa e alta qualidade. O experimento 2 avaliou a qualidade e o desenvolvimento embrionário de oócitos de baixa qualidade fecund
Cienc. Rural. Publicado em: 2016-06
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11. Maps of deformations in a cantilever beam using particle image velocimetry (PIV) and speckle patterns
PIV (particle image velocimetry) has been spreading in studies that use the movement of particles to monitor the displacement of an object or the flow of a fluid by means of velocity vectors using optical techniques and second order statistics. PIV is also known as laser speckle velocimetry when associated with speckle patterns. This technique has been used
Rem: Rev. Esc. Minas. Publicado em: 2015-09
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12. Desafios e perspectivas na produção in vitro de embriões bovinos: enfoque epigenético e em vesículas secretadas por células
Nesta revisão, apresentamos alguns problemas clínicos encontrados nos animais derivados de PIV, principalmente derivados de transferência de núcleo, e discutimos o possível papel da epigenética em tais processos. Além disso, uma vez que vesículas secretadas por células têm sido descritas como possíveis reguladores de processos reprodutivos fisiol�
Cienc. Rural. Publicado em: 07/08/2015