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The growth of delaminations in polymer-matrix fibre composites under cyclic-fatigue loading in operational aircraft structures has always been a very important factor which has the potential to significantly affect the service-life of... more
Hollerbach and Rüdiger have reported a new type of magnetorotational instability (MRI) in magnetized Taylor-Couette flow in the presence of combined axial and azimuthal magnetic fields. The salient advantage of this "helical" MRI (HMRI)... more
, we examined the axisymmetric stability of viscous resistive magnetized Couette flow with emphasis on flows that would be hydrodynamically stable according to Rayleigh's criterion: opposing gradients of angular velocity and specific... more
Axisymmetric stability of viscous resistive magnetized Couette flow is re-examined, with emphasis on flows that would be hydrodynamically stable according Rayleigh's criterion: opposing gradients of angular velocity and specific angular... more
Hollerbach and Rüdiger have reported a new type of magnetorotational instability ͑MRI͒ in magnetized Taylor-Couette flow in the presence of combined axial and azimuthal magnetic fields. The salient advantage of this "helical" MRI ͑HMRI͒... more
The effects of radiation on heat transfer in MHD mixed convection flow and mass transfer past an infinite vertical plate with Ohmic heating and viscous dissipation have been discussed. Approximate solutions have been derived for the... more
The effects of radiation on heat transfer in MHD mixed convection flow and mass transfer past an infinite vertical plate with Ohmic heating and viscous dissipation have been discussed. Approximate solutions have been derived for the... more
Tesla valve is a passive type check valve that empowers flow in one direction without moving parts used for flow control in mini or microchannel systems. It is a system that can be used for a long time with low fatigue and low wear due to... more
Mean wind pressure coefficients on surfaces of a gable-roofed low-rise building are measured in a wind tunnel test and calculated with CFD technique. The errors between these two sets of data are shown and analyzed by detailed comparison.... more
In the petroleum industry, solid particles are often present along with the produced fluids. It is imperative to keep particles from accumulating in flow lines. In this study, various experiments are conducted to study sand particle... more
In the petroleum industry, solid particles are often present along with the produced fluids. It is imperative to keep particles from accumulating in flow lines. In this study, various experiments are conducted to study sand particle... more
The objective of this study is to characterize flow parameters for two-dimensional turbulent jets impinging on a flat surface. An integral form of the momentum equation has been used to obtain a hydrodynamic solution. The boundary layer... more
The use of Gas-Liquid Cylindrical Cyclone (GLCC©) separators for gas-liquid separation is a new technology for oil and gas industry. Consequently, it is important to understand the flow behavior in the GLCC© and effect of different... more
In the production and pipeline transport of various fluids, such as oil and natural gas, solid particles may be entrained in the fluid. These particles, commonly consisting of numerous types and sizes of sand, can travel apart from the... more
The petroleum industry has shown interest in utilizing the Gas-Liquid Cylindrical Cyclone (GLCC) separator as an alternative to the vessel-type separator. Thus, it is important to develop predictive tools for design and to improve the... more
This paper presents new experimental data and an improved mechanistic model for the Gas-Liquid Cylindrical Cyclone (GLCC) separator. The data were acquired utilizing a 3" ID laboratory-scale GLCC, and are presented along with a... more
Several mechanistic models have been already developed for predicting the onset of liquid carryover in gas-liquid cylindrical cyclone (GLCC) separators. However, currently no model is available to predict gas carryunder. A bubble... more
Local measurements and 3D CFD simulations in gas-liquid cylindrical cyclone separators are scarce. The main objective of this study is to conduct local measurements and 3D CFD simulations to understand the swirling flow behavior in a... more
An inflatable beam is an airtight structure made of a soft technical fabric and subjected to an internal pressure which gives it a final cylindrical shape, a pre-stress in the membrane and a bearing capacity. Against all appearances, it... more
HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or... more
Triangular sharp-crested weirs are commonly used to measure low-flow measurements in open channels. The flow over such a V-notch is proportional to the height of water above the weir on the upstream side. Therefore, it is relatively easy... more
Cooling towers are widely used in most industrial units to reject waste heat to the atmosphere. This paper deals with an experimental analysis of heat and mass transfer phenomena between water and air by direct contact in a cooling tower.... more
An experimental study was carried out on the wake of a cylinder on the back of which a plate is installed parallel to the fluid flow, with different terminal angles, where the Reynolds number is 50000. At the end of the plate, blades with... more
This paper presents the results of two triaxial compression tests performed on approximately 9 × 10 3 oblate spheroids (lentils) with different initial orientations with respect to the loading axis (approximately 30°a nd 60°). Typical... more
Mixed convection during evaporation of a water falling film in a vertical concentric annulus was studied numerically. The water thin film falls on the inner tube and is subjected to a constant heat flux density, whereas the outer cylinder... more
The finite element incompressible viscous flow solver, with discretization of total derivative, has been originally developed. Optimization with conjugate gradient method, with finite difference approximation of gradient of objective... more
This paper summarizes the optimization process for deflectors designed to lower the water level and ceiling overflow in the S-shaped outflow channel of HPP Vinodol. Parameterized designs of deflectors were optimized using a genetic... more
Predictions are reported of the two-dimensional turbulent flow around a square cylinder with rounded corners at high Reynolds numbers. The effects of rounded corners have proved difficult to predict with conventional turbulence closures,... more
The use of fossil fuels to supply energy to the buildings is associated with many constraints, including the reduction of the resources and the environmental degradation, and the use of free and renewable sources of energy is noteworthy... more
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Ficha catalográfica preparada pela Seção de Catalogação e Classificação da Biblioteca Central da UFV T Monnerat, Lúcia Patrícia, 1966-M748a Uma abordagem para melhoria do processo de ensino-2012 aprendizagem em desenho técnico utilizando... more
Ficha catalográfica preparada pela Seção de Catalogação e Classificação da Biblioteca Central da UFV T Monnerat, Lúcia Patrícia, 1966-M748a Uma abordagem para melhoria do processo de ensino-2012 aprendizagem em desenho técnico utilizando... more
The numerical results from a simple computational fluid dynamic model of a forced air agricultural produce cooling tunnel are compared with experimental measurements made on a full scale tunnel. The experimental tunnel consists of four... more
The pulsatile ¯ow in a pipe with a moving boundary has been studied for a viscous, incompressible ¯uid by solving the Navier-Stokes equations numerically. The governing equations were formulated in boundary ®tted curvilinear coordinates... more
A numerical simulation of a cold gas dynamic spray process using a computational fluid dynamic (CFD) technique is presented. Distribution of particulate matter in the immediate surroundings of spray application site is of interest. The... more
The main purpose of this article is to verify and validate the mathematical description of the airflow around a wind turbine with vertical axis of rotation, which could be considered as representative for this type of devices.... more
Numerical modelling and experimental validation of the pneumatic powder injection into liquid alloys
The pneumatic powder injection is well-known and widely used with injection lances submerged into metal bath. However, sometimes better is to not introduce the lance below the liquid metal surface because of the metal splashing and... more
In the paper, the numerical model of the flow phenomena in the flotation machine is presented. The process of flotation consists of a number of phenomena which provide serious numerical difficulties. One can enumerate rotation, two phase... more
The main purpose of this article is to verify and validate the mathematical description of the airflow around a wind turbine with vertical axis of rotation, which could be considered as representative for this type of devices.... more