Results 81 to 90 of about 939,565 (189)

Numerical modeling of thermal refraction in liquids in the transient regime

Optics Express, 1999
We present the results of modeling of nanosecond pulse propagation in optically absorbing liquid media. Acoustic and electromagnetic wave equations must be solved simultaneously to model refractive index changes due to thermal expansion and/or electrostriction, which are highly transient phenomena on a nanosecond time scale.
Kovsh, Dmitriy I., Hagan, David J., Van Stryland, Eric W.   +2 more
openaire   +2 more sources

Comparação de modelos computacionais para a simulação de um hidrociclone utilizado na separação de células animais [PDF]

, 2013
O presente trabalho visou reproduzir computacionalmente o escoamento em um hidrociclone especialmente projetado para a separação de células animais, comparando modelos de CFD que possam representá-lo de forma mais rápida e eficaz para que se possa ...
Costa, Sara Martins
core  

Steady and transient regimes in hydropower plants

IOP Conference Series: Materials Science and Engineering, 2013
Hydropower plant that has been in operation for about 30 years has to be reconstructed. They have already installed 12 Kaplan turbines, the largest in the world at that time. The existing CAM relationship was determined based on hydraulic model tests and checked by efficiency on-site tests. It was also tested based on turbine bearing vibrations.
openaire   +1 more source

PRESSURE AND PRESSURE DERIVATIVE TRANSIENT ANALYSIS WITHOUT TYPE-CURVE MATCHING FOR ELONGATED RESERVOIRS WITH CHANGES IN FACIES OR WIDTH

CT&F Ciencia, Tecnología & Futuro, 2010
Due to geologic and tectonic events many reservoirs have an elongated geometry in which dual-linear and single-linear flow regimes may be developed.
Freddy-Humberto Escobar, Matilde Montealegre, Daniel Carrillo-Moreno   +2 more
doaj  

DETERMINATION OF VERTICAL AND HORIZONTAL PERMEABILITIES FOR VERTICAL OIL AND GAS WELLS WITH PARTIAL COMPLETION AND PARTIAL PENETRATION USING PRESSURE AND PRESSURE DERIVATIVE PLOTS WITHOUT TYPE-CURVE MATCHING DETERMINACIÓN DE PERMEABILIDADES VERTICAL Y HORIZONTAL EN POZOS VERTICALES DE GAS Y PETRÓLEO, CON COMPLETAMIENTO Y PENETRACIÓN PARCIAL A PARTIR DE PLOTEOS DE PRESIÓN Y PRESIÓN DERIVADA, SIN AJUSTE TIPO CURVA

CT&F Ciencia, Tecnología & Futuro, 2005
it has been long recognized that in some reservoirs the flow does not follow the expected radial cylindrical pattern. Spherical flow may take place in systems with wells completed in thick reservoirs where a short completion interval is open to flow ...
Katherine Moncada, Djebbar Tiab, Freddy-Humberto Escobar, Matilde Montealegre, Abel Chacon, Renzon Zamora, Sandra-L. Nese   +6 more
doaj  

PRESSURE AND PRESSURE DERIVATIVE ANALYSIS FOR VERTICAL GAS AND OIL WELLS IN STRESS SENSITIVE HOMOGENEOUS AND NATURALLY FRACTURED FORMATIONS WITHOUT TYPE-CURVE MATCHING Analisis de la presión y derivada de presión para pozos verticales de gas y petróleo en formaciones homogéneas y naturalmente fracturadas sensibles a los esfuerzos

CT&F Ciencia, Tecnología & Futuro, 2007
Currently, rock mechanics plays an important role in the oil industry. Effects of reservoir subsidence, compaction and dilation are being taken into account in modern reservoir management of complex systems.
Freddy-Humberto Escobar, José-Humberto Cantillo, Matilde Montealegre-M   +2 more
doaj  

Anisotropic conductivity rotates heat fluxes in transient regimes

Optics Express, 2013
We present a finite element analysis of a diffusion problem involving a coated cylinder enabling the rotation of heat fluxes. The coating consists of a heterogeneous anisotropic conductivity deduced from a geometric transformation in the time dependent heat equation.
Guenneau, Sébastien, Amra, Claude
openaire   +4 more sources

SBC Guideline on the Diagnosis and Treatment of Patients with Cardiomyopathy of Chagas Disease - 2023. [PDF]

Arq Bras Cardiol, 2023
Marin-Neto JA, Rassi A, Oliveira GMM, Correia LCL, Ramos Júnior AN, Luquetti AO, Hasslocher-Moreno AM, Sousa AS, Paola AAV, Sousa ACS, Ribeiro ALP, Correia Filho D, Souza DDSM, Cunha-Neto E, Ramires FJA, Bacal F, Nunes MDCP, Martinelli Filho M, Scanavacca MI, Saraiva RM, Oliveira Júnior WA, Lorga-Filho AM, Guimarães AJBA, Braga ALL, Oliveira AS, Sarabanda AVL, Pinto AYDN, Carmo AALD, Schmidt A, Costa ARD, Ianni BM, Markman Filho B, Rochitte CE, Macêdo CT, Mady C, Chevillard C, Virgens CMBD, Castro CN, Britto CFPC, Pisani C, Rassi DDC, Sobral Filho DC, Almeida DR, Bocchi EA, Mesquita ET, Mendes FSNS, Gondim FTP, Silva GMSD, Peixoto GL, Lima GG, Veloso HH, Moreira HT, Lopes HB, Pinto IMF, Ferreira JMBB, Nunes JPS, Barreto-Filho JAS, Saraiva JFK, Lannes-Vieira J, Oliveira JLM, Armaganijan LV, Martins LC, Sangenis LHC, Barbosa MPT, Almeida-Santos MA, Simões MV, Yasuda MAS, Moreira MDCV, Higuchi ML, Monteiro MRCC, Mediano MFF, Lima MM, Oliveira MT, Romano MMD, Araujo NNSL, Medeiros PTJ, Alves RV, Teixeira RA, Pedrosa RC, Aras Junior R, Torres RM, Povoa RMDS, Rassi SG, Alves SMM, Tavares SBDN, Palmeira SL, Silva Júnior TLD, Rodrigues TDR, Madrini Junior V, Brant VMDC, Dutra WO, Dias JCP.   +91 more
europepmc   +1 more source

The Kramers problem in the energy diffusion regime: transient times

Journal of Physics: Conference Series, 2018
Brownian motion driven by thermal fluctuations play an important role in the work of nanomachines and in single-molecule pulling experiments. Some problems in this field are reduced to the so-called Kramers problem concerning the decay rate of a quasistationary state.
Chushnyakova, M. V., Gontchar, I. I., Blesman, A. I.   +2 more
openaire   +2 more sources

DETERMINAÇÃO DE PROPRIEDADES TÉRMICAS EM REGIME TRANSIENTE

, 1978
Este trabalho apresenta um método para a determinação de propriedades que aparecem em equações diferenciais parabólicas. O método é aplicado na determinação da difusidade térmica e da condutividade térmica de materiais utilizando temperaturas medidas em ...
WASHINGTON BRAGA FILHO
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