Cross Flow Velocity
Mostrando 1-12 de 61 artigos, teses e dissertações.
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1. The Relationship Between Epicardial Adipose Tissue Thickness and Presence of Left Atrial Thrombus in Mitral Stenosis Patients
Abstract Objective: To examine the relationship between the left atrial (LA) thrombus presence and the epicardial adipose tissue (EAT) thickness. Methods: Three hundred and twelve consecutive rheumatic mitral valve stenosis (RMVS) patients with mitral valve area (MVA) < 2 cm2 were included in this cross-sectional study. Patients were divided into two group
Braz. J. Cardiovasc. Surg.. Publicado em: 2020-08
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2. Endothelial Dysfunction and Pulse Wave Reflection in Women with Polycystic Ovarian Syndrome
Abstract Background: Patients with polycystic ovarian syndrome (PCOS) have an increased prevalence of metabolic syndrome and traditional atherosclerotic risk factors, such as dyslipidemia, diabetes and hypertension. Endothelial function and vascular stiffness are surrogate markers of early atherosclerosis, able to predict cardiovascular events. Objective:
Int. J. Cardiovasc. Sci.. Publicado em: 2019-02
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3. Endothelial Dysfunction and Pulse Wave Reflection in Women with Polycystic Ovarian Syndrome
Abstract Background: Patients with polycystic ovarian syndrome (PCOS) have an increased prevalence of metabolic syndrome and traditional atherosclerotic risk factors, such as dyslipidemia, diabetes and hypertension. Endothelial function and vascular stiffness are surrogate markers of early atherosclerosis, able to predict cardiovascular events. Objective:
Int. J. Cardiovasc. Sci.. Publicado em: 06/09/2018
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4. Analog Models of Flanking Structures and a Natural Example in the Quadrilátero Ferrífero, Minas Gerais
ABSTRACT The aim of this study is to present analog models of flanking structures and to analyze the Fábrica Nova synform, Quadrilátero Ferrífero, Minas Gerais, from a geometric point of view. We set up seven models using a linear viscous silicone and produced flanking structures with a shear velocity of 2 cm h-1. At different initial orientations with re
An. Acad. Bras. Ciênc.. Publicado em: 31/07/2017
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5. Entropy Generation Minimization Analysis of Active Magnetic Regenerators
Abstract A performance assessment of active magnetocaloric regenerators using entropy generation minimization is presented. The model consists of the Brinkman-Forchheimer equation to describe the fluid flow and coupled energy equations for the fluid and solid phases. Entropy generation contributions due to axial heat conduction, fluid friction and interstiti
An. Acad. Bras. Ciênc.. Publicado em: 2017-05
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6. Effects of temperature-dependent viscosity on fluid flow and heat transfer in a helical rectangular duct with a finite pitch
An incompressible fully developed laminar flow in a helical rectangular duct having finite pitch and curvature with temperature-dependent viscosity under heating condition is studied in this work. Both the cases of one wall heated and four walls heated are studied. The cross-sectional dimensions of the rectangular duct are 2a and 2b. The aspect ratio n=2b/2a
Braz. J. Chem. Eng.. Publicado em: 2014-09
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7. Fouling behavior and performance of microfiltration membranes for whey treatment in steady and unsteady-state conditions
Whey pretreatment for protein purification is one of the main applications of cross-flow microfiltration before an ultrafiltration process. In this paper, the effects of the operating pressure and crossflow velocity on the membrane performance and the individual resistances in microfiltration of whey for both unsteady and steady-state conditions were investi
Braz. J. Chem. Eng.. Publicado em: 2014-06
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8. Crohn's disease activity assessed by doppler sonography: the role of aortic flow parameters
OBJECTIVES: Intestinal neovascularization and abnormal abdominal arterial flow rates have been reported in Crohn's disease. The aim of this study was to evaluate Doppler sonography as a method for assessing Crohn's disease activity based on changes in splanchnic hemodynamics. METHODS: Forty-eight patients with Crohn's disease, 22 healthy volunteers and 12
Clinics. Publicado em: 2013-04
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9. Pore blocking mechanism for the recovery of milk solids from dairy wastewater by ultrafiltration
This paper evaluates the pore blocking mechanism of two ultrafiltration membranes with different geometries (tubular and spiral wound) when dairy wash water is filtered. The work evaluated the effect of transmembrane pressure and the cross-flow velocity with a 3² experimental design using classical Hermia's models and the resistance-in-series model. The res
Brazilian Journal of Chemical Engineering. Publicado em: 2012-06
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10. Dilute-phase pneumatic conveying of polystyrene particles: pressure drop curve and particle distribution over the pipe cross-section
During the pneumatic conveying of plastic pellets, it has been observed that materials with similar physical characteristics may develop a substantial difference in pressure drop. In this work, the pressure drop in a particle-laden 2.7 meter long horizontal channel with circular cross-section is presented from an experimental perspective. Experiments are car
Brazilian Journal of Chemical Engineering. Publicado em: 2011-03
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11. Development of a micro-heat exchanger with stacked plates using LTCC technology
A green ceramic tape micro-heat exchanger was developed using Low Temperature Co-fired Ceramics technology (LTCC). The device was designed by using Computational Aided Design software and simulations were made using a Computational Fluid Dynamics package (COMSOL Multiphysics) to evaluate the homogeneity of fluid distribution in the microchannels. Four geomet
Brazilian Journal of Chemical Engineering. Publicado em: 2010-09
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12. Influência da velocidade cross-flow na câmara de flotação na eficiência de unidades de flotação por ar dissolvido tratando água para abastecimento / The influence of cross-flow velocity in the flotation chamber on efficiency of a dissolved air flotation unit treating drinking water
O reator de FAD deve propiciar condições adequadas para contato entre as micro-bolhas e os flocos formados no pré-tratamento e também condições para que o conjunto floco/bolha possa ser direcionado ao topo do reator, e assim ser removido. O projeto de pesquisa visou estudar condições hidrodinâmicas proporcionadas pela variação da Velocidade Cross-
Publicado em: 2010