Analysis of an electrical charge tomography system for measuring low concentrations in two phase flow fluids

2016 ◽  
Author(s):  
Imran Saied ◽  
Mahmoud Meribout
Keyword(s):  
Two Phase Flow ◽  
Electrical Charge ◽  
Phase Flow ◽  
Two Phase ◽  
Tomography System ◽  
Low Concentrations

Concentration Profiling Of Two Phase Flow In A Gravity Flow Rig Using Optical Tomography

2012 ◽  
Author(s):  
Sallehuddin Ibrahim ◽  
Mohd Fua’ad Rahmat ◽  
Mustafa Musbah Elmajri ◽  
Mohammad Amri Mohammad Yunus
Keyword(s):  
Cross Section ◽  
Two Phase Flow ◽  
Optical Tomography ◽  
Solid Particles ◽  
Gravity Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Tomography System ◽  
Infra Red ◽  
Tomography Method

Matlamat kertas kerja ini ialah untuk membentangkan penyelidikan tentang penggunaan kaedah tomografi optik menggunakan penderia–penderia infra merah untuk pemantauan masa nyata terhadap zarah–zarah pepejal yang dialirkan oleh rig aliran graviti. Penderia terdiri daripada dua projeksi cahaya orthogonal dan dua projeksi cahaya melintang untuk membentuk deretan atas dan bawah menjadi empat projeksi selari. Penumpuan pancaran daripada satu sumber cahaya dan mengalirkannya melalui rejim aliran yang memastikan keamatan pancaran dikesan pada bahagian yang bertentangan disambungkan kepada agihan dan pekali serapan bagi fasa–fasa yang berbeza dalam laluan pancaran. Maklumat pada aliran yang diperolehi oleh penderia-penderia yang dipasang di bahagian atas dan bawah akan dijadikan dalam bentuk digital oleh sistem perolehan data sebelum ia dihantar ke sebuah computer untuk dianalisis untuk memaparkan keratan silang imej. Penyelidikan ini berjaya dikembangkan dan diuji menggunakan sebuah sistem tomografi infra merah untuk memaparkan kepekatan aliran dwi fasa dalam rig aliran gravity. Kata kunci: Profil kepekatan; aliran dwi fasa; tomografi optic; infra-merah; aliran pepejal The objective of this paper is to present research on the use of an optical tomography method using infra–red sensors for real–time monitoring of solid particles conveyed by a gravity flow rig. The sensor comprised two orthogonal and two diagonal light projections to form upstream and downstream arrays in a total of four parallel projections. Collimating the radiated beam from a light source and passing it through a flow regime ensures that the intensity of radiation detected on the opposite side is linked to the distribution and the absorption coefficients of the different phases in the path of the beam. The information on the flow captured using upstream and downstream infra-red sensors is digitized by the DAS system before it was passed into a computer to be analyzed in order to reconstruct the cross section image. This investigation successfully developed and tested an infra–red tomography system to profile the concentration of two phase flow in a gravity flow rig. Key words: Concentration profiles; two phase flow; optical tomography; infra–red; solid flow

Development of Wireless Tomography System to Measure Solid-Liquid Flow in Rotating Body

2017 ◽  
Author(s):  
Yuya Atagi ◽  
Yuya Akimoto ◽  
Fumiya Nagae ◽  
Kazuya Okawa ◽  
Yoshiyuki Iso ◽  
...  
Keyword(s):  
Real Time ◽  
Two Phase Flow ◽  
Rotational Velocity ◽  
Phase Flow ◽  
Supply Rate ◽  
Two Phase ◽  
Rotating Body ◽  
Tomography System ◽  
Solid Liquid ◽  
Wireless Tomography

A wireless tomography system has been developed to measure the real-time behavior of solid-liquid two phase flow in the centrifuge for controlling a rotational velocity and particle supply rate. The purpose of this study is development of real-time behavior of solid-liquid two phase flow measurement technique and image conductivity distribution in rotating body because a technique for measuring the behavior of solid-liquid two phase flow in the centrifuges has not existed yet. In this study, a device to measure wirelessly behavior of solid-liquid two phase flow in stationary body has developed as a preliminary to measure in rotating body. A centrifugation technology for industry process should be improved to obtain more effective separation, shorten process time and save energy. These requirements are achieved by optimizing rotational velocity and particle supply rate. The real-time measurement of behavior of solid-liquid two phase flow for controlling the rotational velocity and the particle supply rate is essential. In other words, the real-time behavior of solid-liquid two phase flow measurement and the rotational velocity control become innovative technologies. Typical behavior of solid-liquid two phase measurement technics with easy handling in particles liquid two-phase flow uses process tomography because the process tomography is suitable for real-time measurement in a rotating body. Process tomography has high temporal resolution. This detector was used with the wireless because electrical cables are not available for centrifuges under high speed rotational condition. This wireless tomography system was used for a lab scale rotating machinery measurement experiment. Consequently, we could wirelessly measure the behavior of solid-liquid two phase flow in stationary body in real time and get data to image the behavior of solid-liquid two phase flow. This result images the behavior of solid-liquid two phase flow. Observing it enable to control a rotational velocity and particle supply rate. So this wireless tomography system can separate solid-liquid two phase flow efficiently.

An electric-based dual-mode tomography system for interpretation on two-phase flow in oil wells

2017 ◽  
Vol 5 (2) ◽  
pp. T259-T264 ◽  
Author(s):  
Kuo Zhang ◽  
Xiling Wu ◽  
Jingfu Yan ◽  
Jiatie Cai
Keyword(s):  
Two Phase Flow ◽  
Reconstruction Algorithm ◽  
Oil Wells ◽  
Phase Flow ◽  
Dual Mode ◽  
Two Phase ◽  
Tomography System ◽  
Ill Posed ◽  
The Comparative Study

The difficulty for most existing electric/magnetic tomography approaches is the ill-posed characteristic of the inverse problem. Multimode measurement aims to improve the accuracy and efficiency of imaging by fusion of different data forms. We have established an electric-based dual-mode tomography system especially including an innovative image reconstruction algorithm with objectivity. The quality of the reconstructed images is assessed through the comparative study of various algorithms for four typical two-phase flow distributions in oil wells. The most precise result of the newly proposed algorithm indicates the development potential of electric-based dual-mode tomography for well-logging interpretation.

2D Measurement and Simulation of Microparticle Cross-Sectional Distribution by Micro Process Tomography

2010 ◽  
Author(s):  
Je-Eun Choi ◽  
Tong Zhao ◽  
Masahiro Takei
Keyword(s):  
Fluid Flow ◽  
Cross Section ◽  
Particle Distribution ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Particle Movement ◽  
Two Phase ◽  
Cross Sectional ◽  
Tomography System ◽  
Process Tomography

The application of micro process tomography to microchannels is considered in this paper. Using the micro process tomography system in microchannel, a particle distribution image can be obtained in a two phase flow. Based on the reconstructed image, it is easy to estimate the particle movement in a fluid flow. A novel microchannel system is designed for electrical process tomography that includes 60 electrodes distributed cross-sectional at five positions. The particle and water were injected into the microchannel, and then the capacitance of the fluid flow was measured at cross-section of microchannel. The result showed the 2D image of particle distribution of cross-section in the microchannel. Also, cross-sectional images of the particle distribution of a two phase flow are simulated.

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