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Wednesday, May 13, 2020 | History

2 edition of Studies of gas-liquid flow in bends found in the catalog.

Studies of gas-liquid flow in bends

Albina Maria de Sa Ribeiro

Studies of gas-liquid flow in bends

by Albina Maria de Sa Ribeiro

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  • 2 Currently reading

Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D) - University of Birmingham, School of Chemical Engineering, 1994.

Statementby Albina Maria de Sa Ribeiro.
ID Numbers
Open LibraryOL21123192M

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus. Of the four type of Two-Phase Flow (Gas-Liquid, Gas-Solid, Liquid-Liquid and Liquid-Solid), gas-liquid flows are the most complex, since they combine the characteristics of a deformable interface and the compressibility of one of the given flows of the two phases in a given channel, the gas-liquid interfacial distribution can take any of an infinite number of possible forms.

BASIC HYDRAULIC PRINCIPLES OF OPEN-CHANNEL FLOW by Harvey E. Jobson and David C. Froehlich ABSTRACT The three basic principles of open-channel-flow analysis the conserva­ tion of mass, energy, and momentum are derived, explained, and applied to solve problems of open-channel flow. These principles are introduced at a. studies have been conducted to determine the principles governing the flow of heterogeneous gas-liquid mixtures in vertical and inclined wells [2,3,4,8,9]. The basis for any fluid flow calculations is an energy balance for the flow in fluid between two points. A steady-state mechanical energy balance equation for one pounce mass of fluid.

Indication of Laminar or Turbulent Flow The term fl tflowrate shldbhould be e reprepldbR ldlaced by Reynolds number,,where V is the average velocity in the pipe, and L is the characteristic dimension of a flow.L is usually D R e VL / (diameter) in a pipe flow. in a pipe flow. --> a measure of inertial force to the > a measure of inertial force to the. Am Minimum pipe cross-sectional flow area required, in (mm per m³/h liquid flow) Amm Cross-section of pipe, in (mm²) Bd Rate of flow in barrels (42 U.S gallons)per day Bh Rate of flow in barrels (42 U.S gallons) per hour BX & B Y Baker parameters C Hazen-Williams constant D Inside diameter of pipe, in (m) D p Particle diameter, in (mm) d i.


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Studies of gas-liquid flow in bends by Albina Maria de Sa Ribeiro Download PDF EPUB FB2

The reduction in entrained liquid mass flux after the bend above certain flow conditions, is caused by drops depositing on the outside wall of the bend.

For the flow conditions under study, the Sauter mean diameter varies between um. Gas velocity has a strong influence on drop size, ie, the higher the gas velocity the smaller the drop size.

Enter the password to open this PDF file: Cancel OK. File name:. Request PDF | Experimental and computational fluid dynamics (CFD) studies of gas-liquid flow in bends | Within the oil industry there is a need to measure and predict the form of the multiphase Author: Mukhtar Abdulkadir.

Variations between Studies of gas-liquid flow in bends book liquid film thickness and bend angles are reported for the vertical o bend. Contrary to the conclusions reached by Hills () and Anderson and Hills (), the liquid film thickness becomes annular flow in the o bend at low liquid flow rates and stratified flow at higher liquid superficial velocities.

Bao ZY, Fletcher DF, Haynes BS () An experimental study of gas–liquid flow in a narrow conduit. Int J Heat Mass Transfer – CrossRef Google Scholar Barajas AM, Panton RL () The effect of contact angle on two-phase flow in capillary tubes.

They also reported that the flow ° behaviour round the bend is affected due to existence of centrifugal and gravitational forces. The objective of current work is to expand the understandinthe g of flow behaviour in large diameter pipes connected together by bends.

The ° experimental investigation focused on the gas-liquid two-phase flow. Experimental investigation has been carried out on upward and downward vertical pipes with ° bends to study gas-liquid two-phase flow behaviours in pipes with serpentine configuration.

Wire mesh sensor (WMS) is installed at top and bottom positions of upward and downward sections in order to identify the void fraction distributions.

of flow in various pipe bends attached to the end of a long straight pipe, for a pipe Reynolds number of x lo5. The behaviour of the induced secondary flows is presented in detail. In a " bend it is found that, from the start of tho bend, the secondary flows increase to a.

Bends, Flow and Pressure Drop in. Jayanti, Sreenivas. DOI: /_flow_and_pressure_drop_in. Single-Phase Flow. The main feature of flow through a bend is the presence of a radial pressure gradient created by the centrifugal force acting on the fluid. Because of this, the fluid at the center of the pipe moves towards the outer.

Figure indicates flow approaching a bend with a uniform velocity U. Within the bend we shall assume a free vortex distribution of velocity, given by u C r = () where u is the streaming velocity at radius r from the centre of curvature of the bend.

Separation and secondary flow will be neglected. The constant C may be found by. Bends installed in the path of oil and gas pipelines are at risk of such erosion as mentioned. This paper is a study of computational fluid dynamics to predict erosion in the bend geometry.

Experimental and computational fluid dynamics (CFD) studies of gas-liquid flow in bends one component which has received little attention is the characterisation of the multiphase flow around bends under various process conditions.

To predict the flow regimes in greater details requires the development of instrumentation that can measure. Reynolds number is ~ The studies that address problem of oscillaorty flow through bends are generally limited, in comparison with the steady flow study.

However, numerical study of the flow phenomena and losses associated with the oscillatory flow through the curved bends of constant circular cross section are even more difficult to find. These results were confirmed by the high-speed videos taken around the bend. For the vertical o return bend, the average film fraction was identified to be higher in straight pipes than in bends.

For low liquid and higher gas flow rates, due to the action of gravity drainage, film breakdown occurs at the 45o bend. For air, a psi air supply line was used, and after the flow was filtered, the maximum flow achieved was SLPM.

For the measurement of the gas flow, two rotameters were used; the first one allows the measurement of flows below 10 SLPM with a precision of 1 SLPM. Above 10 SLPM, the precision decreases to 20 SLPM. The purpose of this study is to simulate numerically the flow pattern and characterize the swirling secondary flow in 90° bends.

Flow simulation using CFD techniques are performed to understand. Slurry flow through a pipe bend is of most important concern as it contributes not only to high pressure drop and prone to extra erosion in the pipeline.

Pipe bends also provide flexibility in a route of slurry pipelines. Pipe bends acquire relatively higher pressure drop. The title Flow, Turbulence and Combustion, adopted inreflects this thematic inclination and focus.

Flow, Turbulence and Combustion is published in association with ERCOFTAC – the European Research Community on Flow, Turbulence and Combustion. ERCOFTAC is an active worldwide association of universities, research institutes and industries collaborating in the area of fluid. In a bend, secondary flow is produced as shown in the figure because of the introduction of the centrifugal force, and the loss increases.

If guide blades are fixed in. DESIGN AND ANALYSIS OF FUEL FLOW IN BEND PIPES anan, 2 Renjith 1,2 Assistant Professor Department of Mechanical Engine ering, BIST, BIHER, Bharath University, Chennai. @ Abstract: Pipe flow, a branch of Hydraulics and Fluid Mechanics, was a type of liquid flow within a.

Below, a review of recent studies regarding pressure drop in elbows is presented. Mandal S. N., and Das S. K. (), evaluated pressure drop on different types of horizontal bends for gas-liquid flow and developed correlations to predict the two-phase friction factor.

After comparing the predicted val.Experimental study of kerosene-water two-phase flow in a vertical pipe using hot-film and dual optical probes. The Canadian Journal of Chemical Engineering, Vol. 91, Issue. 7, p. The Canadian Journal of Chemical Engineering, Vol.

91, Issue. 7, p. We investigate the effect of a return U-bend on flow behaviour in the vertical upward section of a large-diameter pipe. A wire mesh sensor was employed to study the void fraction distributions at axial distances of 5, 28 and 47 pipe diameters after the upstream bottom bend.

The study found that, the bottom bend has considerable impacts on up-flow behaviour.