Imaging Of Solid Flow In Air Using Dual Modality Tomography

2012 ◽  
Author(s):  
Salehuddin Ibrahim ◽  
Noorfaizah Mohammad Rohi ◽  
Mustafa Musbah Elmajri ◽  
Nor Syahiran Zahidin
Keyword(s):  
Pipe Wall ◽  
Optical Tomography ◽  
Phase Flow ◽  
Concentration Profiles ◽  
Two Phase ◽  
Solid Flow ◽  
Tomographic Images ◽  
Dual Modality ◽  
Tomography System ◽  
Infra Red

Matlamat keseluruhan projek ini ialah untuk menyelidiki manfaat yang boleh diperoleh daripada sistem tomografi dwi ragam (optik dan elektrodinamik) untuk mengukur imej tomografi terhadap aliran pepejal. Penyelidikan ini melibatkan kajian ke atas pengagihan manikmanik plastik yang dialirkan dalam sebuah paip dengan memasang penderia–penderia optik dan elektrodinamik di sekeliling paip tanpa mengganggu aliran di dalam paip. Sistem tomografi dwi raga mini dibahagikan kepada dua bahagian, yang terdiri dari perkakasan dan perisian. Perkakasan optik direka bentuk menggunakan 32 BPX65 penderia foto diod yang bertindak sebagai penerima dan dua lampu halogen yang bertindak sebagai pemancar cahaya. Penderia–penderia ini diatur sebagai dua projeksi selari. Penderia–penderia elektrodinamik direka bentuk menggunakan 16 elektrod yang dipasang pada jarak yang sama di sekeliling dinding paip. Sistem tomografi ini mampu memaparkan agihan kepekatan objek di dalam paip. Kata kunci: Profil kepekatan; aliran dwi fasa; tomografi optic; infra–merah; aliran pepejal The overall aim of this project is to investigate the benefits of dual modality (optical and electrodynamics) tomography system for the measurement of tomographic images of solids flow. This research will investigate the distribution of conveying plastic beads in a conveying pipe by placing optical and electrodynamics sensors around the pipe without interrupting the flow inside the pipe. The dual modality tomography system is divided into two main parts, which are the development of hardware and software. Optical hardware is designed using 32 BPX65 photodiode sensors acting as receivers and two halogen bulbs acting as light transmitters. The sensors are arranged as two parallel projections. The electrodynamics sensors are designed using 16 electrodes positioned equidistantly around the periphery of the pipe wall. The tomography system is able to display the concentration profile of the objects inside the pipe. Key words: Concentration profiles; two phase flow; optical tomography; infra–red; solid flow

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

Charge‐coupled device based on optical tomography system for monitoring two‐phase flow

2017 ◽  
Vol 53 (5) ◽  
pp. 331-333 ◽  
Author(s):  
J. Jamaludin ◽  
R. Abdul Rahim ◽  
H. Abdul Rahim ◽  
M.H. Fazalul Rahiman ◽  
J. Mohd Rohani
Keyword(s):  
Two Phase Flow ◽  
Optical Tomography ◽  
Phase Flow ◽  
Two Phase ◽  
Charge Coupled Device ◽  
Tomography System

Prediction of bubble concentration profiles in vertical turbulent two-phase flow

1985 ◽  
Vol 11 (5) ◽  
pp. 629-641 ◽  
Author(s):  
Steven W. Beyerlein ◽  
Rainer K. Cossmann ◽  
Horst.J. Richter
Keyword(s):  
Two Phase Flow ◽  
Phase Flow ◽  
Concentration Profiles ◽  
Two Phase ◽  
Turbulent Two Phase Flow

An ECT/ERT dual-modality sensor for oil-water two-phase flow measurement

2014 ◽  
Author(s):  
Pitao Wang ◽  
Huaxiang Wang ◽  
Benyuan Sun ◽  
Ziqiang Cui ◽  
Wenrui Huang
Keyword(s):  
Flow Measurement ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Dual Modality ◽  
Oil Water

scholarly journals Measurement of interphase forces based on dual-modality ERT/DP sensor in horizontal two-phase flow gas-water

Measurement ◽  
2019 ◽  
Vol 136 ◽  
pp. 703-717
Author(s):  
Lide Fang ◽  
Peipei Wang ◽  
Qiaoqiao Zeng ◽  
Mingming Li ◽  
Xiaoting Li ◽  
...  
Keyword(s):  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Dual Modality

Numerical simulation of gas-solid flow characteristic of particles in fibrous media using OpenFOAM

2019 ◽  
Vol 29 (7) ◽  
pp. 921-930 ◽  
Author(s):  
Zhiyong Shu ◽  
Fuping Qian ◽  
Jinjing Zhu ◽  
Jinli Lu
Keyword(s):  
Numerical Simulation ◽  
Flow Characteristic ◽  
Two Phase Flow ◽  
Dendritic Structure ◽  
Filtration Efficiency ◽  
Pressure Differential ◽  
Phase Flow ◽  
Fibrous Media ◽  
Two Phase ◽  
Solid Flow

Euler-Lagrangian numerical simulation framework of gas-solid two-phase flow was used to simulate the gas-solid flow characteristic in fibrous media using OpenFOAM in this study. The simulation results were compared with the empirical model and CFD-DEM method. In addition, the deposition morphology of particles, pressure differential and filtration efficiency in unsteady stage and simulation cost were also analysed with OpenFOAM. The results show that OpenFOAM can simulate the process of gas-solid two-phase flow in the fibrous media, and the particles are agglomerated on the surface of fibrous media and form a dendritic structure similar to the experimental observation. The pressure differential in unsteady stage would increase with the mass per unit area. The filtration efficiency would increase with a corresponding increase in the amount of deposition, but the growth rate would decline gradually. Compared with CFD-DEM method, the simulation accuracy with OpenFOAM is slightly lower, especially in the case of large the Stokes number, but the simulation cost is low, too. Therefore, it is necessary to choose one of the two methods according to the actual situation.

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