This paper discusses the relationship between the change of flow patterns and the flow rates. Furthermore, a convolutional neural network (CNN) algorithm is proposed to predict the oil flow rate, gas flow rate, and GVF (gas void fraction, especially referring to sectional gas fraction) of the twophase flow.
Studies are reported of the flow patterns in vertical upwards flow of airwater mixtures in a 1 1/4 inch bore tube at pressures ranging from 6 65 psig. The flow pattern was observed by means of simultaneous high speed flash and high speed Xray photography. Particular attention was paid to the region of high liquid rates where ordinary photographic methods are inadequate.
Accepted 02 April, 2012 In this article, a numerical model was obtained in a two dimensional flow pattern simulation around a groyne. The model approximates the depthaveraged, shallow water equations with a finite volume, semiimplicit and semiLagrangian representation. RungeKutta scheme was used for departure point determination.
TwoStep Flow of Communiion Theory 889 the presidential candidates more from family mem media messages. People were assumed to be powerless bers and other daily social contacts than from the news and easily influenced by propagandists using modern media. The study also revealed that "opinion leaders" mass media.
A pair of ultrahighfrequency (UHF) radars system for measuring the twodimensional river flow patterns is presented. The system consists of two alldigital UHF radars with exactly the same hardware structure, operating separately at 329–339 MHz and 341–351 MHz. The adoption of direct radio frequency (RF) sampling technique and digital pulse compression simplifies the structure of radar ...
Flow Pattern Parameters. Each task in a flow pattern supports task actions, such as submit, roll back, mark for retry, retry, and view. Task action parameters control how the appliion processes a task and how the task relates to other tasks in the flow pattern. Flow parameters are .
Jul 28, 2015 · The two inferred clusters clearly corresponded with the Atlantic and the Pacific ocean basins, highlighting the importance of the CAI as a barrier to gene flow for the mangrove species (Figs 1A,B and 2A,B). Analyses performed on samples from each ocean basin also revealed genetic structure mainly associated with the geographic distribution of ...
Here, we investigate genomic differentiation and geneflow patterns for autosomes using RADseq data between two closely related species of longtailed tits (Aegithalos bonvaloti and A. fuliginosus) in both allopatric and contact zone populations. The results confirm recent or .
Mar 25, 2019 · Using Machine Learning to improve the prediction of two phase flow patterns in oil wells GitHub gaurakshay/Predicttwophaseflowpattern: Using .
Sep 30, 2001 · The effects of pressure on flow pattern transition boundaries for crude oilnatural gas twophase flow were investigated. Experimental observations of flow patterns were carried out for different pressures (200 and 450 psia) and inclination angles (horizontal, +1 degree and vertical).
Jan 01, 2013 · Combine Taitel and Dukler's gasliquid flow pattern classifiion method with oilwater pipe flow characteristics, the flow patterns of low viscosity oilwater twophase flow are classified as stratified flow, w/o dispersed flow, o/w dispersed flow, and .
Sep 18, 2020 · This paper presents a novel method combining extreme learning machine (ELM) and multiple empirical mode decomposition (MEMD) to identify flow patterns of oil–water twophase flow. The proposed method can recognize accurately five typical flow patterns of horizontal oil–water twophase flow. Taking the Lorenz system as an example, we verify the MEMD is more suitable for .
Jul 17, 2014 · Strategic appliion of external electrostatic field on a pressuredriven twophase flow inside a microchannel can transform the stratified or slug flow .
Comparative phylogeography offers a unique opportunity to understand the interplay between past environmental events and lifehistory traits on diversifiion of unrelated but codistributed species. Here, we examined the effects of the quaternary climate fluctuations and palaeomarine currents and presentday marine currents on the extant patterns of genetic diversity in the two most ...
Presently, there was no two phase flow study done on the Malaysian waxy crude oilwater. Therefore, a research work was conducted at the Malaysia Petroleum Resources Corporation Institute for Oil and Gas, Universiti Teknologi Malaysia to study the flow pattern of the Malaysian waxy crude oilwater flowing in a closedloop system at the ambient ...
The twophase flow patterns of HFC134a with lubricant oil mixtures inside a smooth horizontal tube were experimentally elucidated. Tests were performed in an inside diameter of mm having a lubriing oil concentration of 5%. Tests were made of mass fluxes ranging between 150 and 590 kg/m 2 s. The most obvious difference from oilfree ...
Pressure losses in twophase, gasliquid flow are quite different from those encountered in singlephase flow; in most cases an interface exists and the gas slips past the liquid. The interface may be smooth or have varying degrees of roughness, depending on the flow pattern.
Aug 28, 2009 · A dimensionless parameter, Reynolds Number, is defined as the ratio of inertial and viscous force to characterize these two types of flow patterns. With increase in flow velocity the initial forces increase so the Reynonlds Number. For moderate flows the Reynolds Number is below 2000 and for Turbulent Flows it is well above 2300.
Dec 10, 2013 · Dec 10, 2013 · A systematic work on the prediction of flow patterns transition of the oilwater twophase flows is carried out under a wide range of oil phase viscosities, where four main flow regimes are considered including stratified, dispersed, coreannular, and intermittent flow. For oil with a relatively low viscosity, VKH criterion is considered for the stability of stratified flow, and critical drop ...
Flow Patterns – Twophase Flow. One of the most challenging aspects of dealing with twophase flow or multiphase flow is the fact that it can take many different forms. Spatial distributions and velocities of the liquid and vapor phases in the flow channel is very important aspect in many engineering drops and also heat transfer coefficients strongly depends on the local ...
Oct 29, 2010 · The effects of Bond number (Bo) on internal flow patterns of an inclined, closed, twophase thermosyphon at critical state are considered in this article. The thermosyphons used employed a glass tube for the evaporator and the adiabatic section, and a copper tube for the condenser section. The internal diameters of the thermosyphon were 10, 12 ...
