Initial Study On Ultrasonic Tomography For Multiphase Flow Application

2012 ◽  
Author(s):  
Suzanna Ridzuan Aw ◽  
Hudabiyah Arshad Amari ◽  
Jaysuman Pusppanathan ◽  
Mohd Hafiz Fazalul Rahiman ◽  
Yasmin Abd Wahab
Keyword(s):  
Multiphase Flow ◽  
Pipe Wall ◽  
Initial Study ◽  
Phase System ◽  
Ultrasonic Tomography ◽  
Peak Voltage ◽  
Three Phase ◽  
Three Phase Flow ◽  
Projection Approach ◽  
Solid Liquid

Kertas kerja ini membentangkan kajian awal terhadap kaedah tomografi ultrasonik ke atas aplikasi pengaliran yang mempunyai lebih daripada satu fasa. Ianya bertujuan untuk mengkaji kemampuan tomografi ultrasonik untuk memantau aliran tiga fasa (pepejal/cecair/udara) berikutan kajian ini belum dilaksanakan oleh mana–mana penyelidik. Di dalam projek ini, lapan unit penderia ultrasonik berfrekuensi 40 kHz di pasang di sekeliling paip di mana empat daripadanya berfungsi sebagai pemancar dan empat lagi sebagai penerima. Setiap pemancar akan memancarkan dua kitar denyut berfrekuensi 40 kHz pada ujaan voltan 24Vp–p. Eksperimen ini adalah berdasarkan kaedah pancaran dan penerimaan gelombang ultrasonik di mana voltan puncak ke puncak gelombang ultrasonik di ambil dan di analisis. Maklumat yang diperoleh daripada projek ini menunjukkan bahawa kondisi dan komposisi aliran yang berbeza akan memberikan bacaan voltan keluaran yang berbeza. Ini disebabkan oleh galangan dan halaju setiap bahan adalah berbeza. Hasil dan analisis kajian boleh digunakan untuk kajian dan penyelidikan yang lebih mendalam ke atas sistem tiga fasa. Kata kunci: Tomografi ultrasonic; aliran pelbagai fasa; ultrasonik This paper presents the initial study on ultrasonic tomography for multiphase flow application to investigate ability of ultrasonic tomography for used in monitoring the three phase flow (solid/liquid/gas) at once since there are no research on this conducted yet. In this project, eight units of 40 kHz ultrasonic sensors were mounted non-invasively around the pipe wall where four of it acts as a transmitter and the other four as a receiver. Each transmitter will transmit two cycles of pulses of 40 kHz at an excitation voltage of 24Vp–p. By using transmission–mode and fan–shaped beam projection approach, the peak to peak voltage of the received ultrasonic wave are measured. The investigation was based on the transmission and reception of sensors that were mounted circularly on the surface of experiment vessel. The results obtained throughout this research project had shown that different flow condition and composition will gives different value of output voltage. And the information and analysis of the results can be used for further investigation on the three phase system. Key words: Ultrasonic tomography; multiphase flow; ultrasonic

Generalized Young Equation for Cylindrical Droplets within a Homogeneous and Smooth Regular Triangular Prism Filled with Gas in Three Convex Corners

2016 ◽  
Vol 6 (1) ◽  
pp. 14
Author(s):  
Long Zhou ◽  
Guang-Hua Sun ◽  
Ai-Jun Hu ◽  
Xiao-Song Wang
Keyword(s):  
Line Tension ◽  
Phase System ◽  
Triangular Prism ◽  
Gas Phases ◽  
Three Phase ◽  
Dividing Surface ◽  
Solid Liquid ◽  
Wetting Behaviors ◽  
Young Equation ◽  
Dividing Line

<p class="1Body">Based on the approaches of Gibbs’s dividing surface and Rusanov’s dividing line, the wetting behaviors of cylindrical droplets that at equilibrium are sitting inside a homogeneous and smooth regular triangular prism filled with gas in three convex corners are studied. For the three-phase system, which is composed of solid, liquid and gas phases, a generalized Young equation for cylindrical drops in a homogeneous and smooth regular triangular prism imbued with gas within three apex corners has been successfully derived including the effects of the line tension.</p>

Research on the Oil-Gas-Water Three-Phase Flow Experimental Apparatus

2011 ◽  
Vol 328-330 ◽  
pp. 2023-2026
Author(s):  
Ying Xu ◽  
Tao Li
Keyword(s):  
Control System ◽  
Multiphase Flow ◽  
System Control ◽  
Phase Flow ◽  
Monitoring And Control ◽  
Three Phase ◽  
Experimental Apparatus ◽  
Three Phase Flow ◽  
And Control ◽  
Oil Gas

The oil-gas-water three-phase flow experimental apparatus in key laboratory of process monitoring and control in Tianjin University is a set of indoor small experimental device, which can simulate oil wells, simulate the pipeline transport of multiphase flow and study the experiment of multiphase flow. The device includes energy power dynamic systems, measurement pipelines systems, multiphase flow test pipelines system, control valves, sampling and control system platform. The software of the control system is mixed programming between the configuration software MCGS and the Visual Basic.

Development of Transient Mechanistic Three-Phase Flow Model for Wellbores

SPE Journal ◽  
2016 ◽  
Vol 22 (01) ◽  
pp. 374-388 ◽  
Author(s):  
Mahdy Shirdel ◽  
Kamy Sepehrnoori
Keyword(s):  
Multiphase Flow ◽  
Flow Model ◽  
Fluid Model ◽  
Phase Flow ◽  
Complex Flow ◽  
Flow Models ◽  
Drift Flux Model ◽  
Three Phase ◽  
Three Phase Flow ◽  
Two Fluid

Summary Multiphase flow models have been widely used for downhole-gauging and production logging analysis in the wellbores. Coexistence of hydrocarbon fluids with water in production wells yields a complex flow system that requires a three-phase flow model for better characterizing the flow and analyzing measured downhole data. In the past few decades, many researchers and commercial developers in the petroleum industry have aggressively expanded development of robust multiphase flow models for the wellbore. However, many of the developed models apply homogeneous-flow models with limited assumptions for slippage between gas and liquid bulks or use purely two-fluid models. In this paper, we propose a new three-phase flow model that consists of a two-fluid model between liquid and gas and a drift-flux model between water and oil in the liquid phase. With our new method, we improve the simplifying assumptions for modeling oil, water, and gas multiphase flow in wells, which can be advantageous for better downhole flow characterization and phase separations in gravity-dominated systems. Furthermore, we developed semi-implicit and nearly implicit numerical algorithms to solve the system of equations. We discuss the stepwise-development procedures for these methods along with the assumptions in our flow model. We verify our model results against analytical solutions for the water faucet problem and phase redistribution, field data, and a commercial simulator. Our model results show very good agreement with benchmarks in the data.

Visualization study on the flow pattern of gas-solid-liquid three-phase flow in upriser airlift pump

2020 ◽  
Author(s):  
Nurmala Dyah Fajarningrum ◽  
Deendarlianto ◽  
Indarto ◽  
IGNB Catrawedarma
Keyword(s):  
Flow Pattern ◽  
Phase Flow ◽  
Three Phase ◽  
Three Phase Flow ◽  
Airlift Pump ◽  
Solid Liquid

Application of CFD Modelling Technique in Engineering Calculations of Three-Phase Flow Hydrodynamics in a Jet-Loop Reactor

2004 ◽  
Vol 2 (1) ◽  
Author(s):  
Roman G. Szafran ◽  
Andrzej Kmiec
Keyword(s):  
Control Volume ◽  
Turbulence Models ◽  
Liquid System ◽  
Circulation Rate ◽  
Phase System ◽  
Cfd Modelling ◽  
Loop Reactor ◽  
Three Phase ◽  
Three Phase Flow ◽  
Solid System

The hydrodynamics of a down flow jet-loop reactor with a gas-liquid-solid three-phase system in semi-industrial scale were investigated. The Eulerian-Eulerian modelling approach was applied to predict flow behaviour in the reactor. A commercially available, control-volume-based code FLUENT 6.1 was chosen to carry out the computer simulations. In order to reduce computational times and required system resources, the 2D axisymmetric segregated solver was chosen. The influence of different k-e turbulence models, as well as, different types of meshes on velocity profiles in each phase was analyzed. The unstructured mesh reduces discrepancies on the axis of symmetry caused by the axisymmetric solver and is more accurate. The prediction error of the water circulation rate ratio for a gas-liquid system was only 3.6 % and about 15 % for gas-liquid-solid system. Unfortunately the gas hold-up was not predicted properly.

Experimental analysis of the hydrodynamics of a three-phase system in a vessel with two impellers

2012 ◽  
Vol 66 (6) ◽  
Author(s):  
Anna Kiełbus-Rąpała ◽  
Joanna Karcz
Keyword(s):  
Experimental Analysis ◽  
Gas Flow ◽  
Gas Bubbles ◽  
Liquid System ◽  
Internal Diameter ◽  
Phase System ◽  
Gas Dispersion ◽  
Rushton Turbine ◽  
Three Phase ◽  
Solid Liquid

AbstractResults of experimental analysis concerning gas hold-up and average residence time of gas bubbles in a three-phase gas-solid-liquid system produced in a baffled, double-impeller vessel are presented. Measurements were carried out in a vessel with the internal diameter of 0.288 m. Two different double-impeller configurations were used for agitation: Rushton turbine (lower) — A 315 (upper) and Rushton turbine (lower) — HE 3 (upper). Upper impellers differed in the fluid pumping mode. Coalescing and non-coalescing systems were tested. Liquid phases were distilled water (coalescing system) and aqueous solutions of NaCl (non-coalescing systems). The ability of gas bubbles to coalesce in the liquid was described using parameter Y. Dispersed phases were air and particles of sea sand. The experiments were conducted at seven different gas flow rates and two particle loadings. Effects of the ability of gas bubbles to coalesce (liquid phase properties), operating parameters (superficial gas velocity, impeller speed, solids loadings), and of the type of the impeller configuration on the investigated parameters were determined. The results were approximated mathematically. For both impeller configurations tested, significantly higher gas hold-up values were obtained in the non-coalescing gas-solid-liquid systems compared to the coalescing one. Out of the tested impeller systems, the RT-A 315 configuration proved to have better performance ensuring good gas dispersion in the liquid in the three-phase systems.

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