Innovative Techniques For Two-Phase Flow Measurements

Ismail, Basel I.; Ahmed, Wael H.

doi:10.2174/1874476110801010001

Cited by 42 publications

(7 citation statements)

References 18 publications

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“…There are three types of particle motion: immediate collision, particle momentum, and suspension motion, which are regulated by drag force. The Navier-Stokes (NS) equation [27] of the continuous medium explains the particle motion using the trajectory of every particle, which can be calculated using Equation (10) [27]:…”

Section: Solid Flow Simulationmentioning

confidence: 99%

Analysis of Complex Solid-Gas Flow under the Influence of Gravity through Inclined Channel and Comparison with Real-Time Dual-Sensor System

et al. 2021

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Gas-solid flow is used in the chemical industry, food industry, pharmaceuticals, vehicles, and power generation. The calculation of flow has aroused great interest in contemporary industry. In recent decades, researchers have been seeking to build an effective system to monitor and calculate gas-solid flow. Attempts have been extended from computational modeling to the creation of flow pattern visualization methods and mass flow (MFR) quantification. MFR is usually studied by volume flow concentration (VFC) and velocity distribution of solid particles. A non-invasive device is used for testing MFR, in which electronic and mechanical sensors are used to balance the shortcomings related to each other. This study investigates the simulation of flow patterns to demonstrate the behavior of solid particles as they pass through the channel. The particles are allowed to slide longitudinally in the insulated tending channel. This slippage is due to the influence of natural gravity. Electronic sensor components are used to measure the velocity distribution and concentration of volumetric flow. The load cell is used as an auxiliary sensor for measuring MFR. In addition, ANSYS fluent is used to analyze streaming queries. The experimental results are related to evaluating the accuracy and relative error of the data collected from various sensors under different conditions. However, the simulation results can help explain the movement of the gas-solid mixture and can understand the cause of pipeline blockage during the slow movement of solid particles.

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Section: Solid Flow Simulationmentioning

confidence: 99%

Analysis of Complex Solid-Gas Flow under the Influence of Gravity through Inclined Channel and Comparison with Real-Time Dual-Sensor System

et al. 2021

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“…In this fashion, applying equation (4) in equation (2) and (1) it is possible to calculate the measured void fraction which will be further discussed. Fig.…”

Section: Liquid Height Measurementmentioning

confidence: 99%

Sensing Platform for Two-Phase Flow Studies

et al. 2019

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This paper describes the development and application of a sensing platform which consists of fast conductance sensors and proper data acquisition and management software which aims at the investigation of two-phase flow parameters in pipelines. A number of sensing nodes are connected through a network which allows monitoring the flow at different pipeline positions. In addition, a data management Web-based platform is presented in order to store and manage the massive volume of data generated by data acquisition. The sensor electronics has been evaluated in temporal response and the capability to measure the parameters such as void fraction time series and structure velocities. The preliminary study of horizontal two-phase flow experiment is presented showing the capability of the developed platform to monitor flow parameters along a pipe. INDEX TERMS Liquid height measurement, sensing platform, two-phase flow, two-wire sensor.

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“…It is less priced, fast, safe, and easy to use. In particular, ECT can offer extra data on the gas-solid flow hydrodynamics [5], for example, flow transition from bubbling to slowing flux for scaling the CFB process from the laboratory scale to the production scale with diverse riser structures and cyclones. ECT is commonly used in many other imaging modalities for visualization besides magnetic resonance imaging (MRI) [6] and X-ray tomography [7].…”

Section: Introductionmentioning

confidence: 99%

Iterative Algorithms for Deblurring of Images in Case of Electrical Capacitance Tomography

Jaffri

Almogren

Ahmad

et al. 2021

Mathematical Problems in Engineering

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Electrical capacitance tomography (ECT) has been used to measure flow by applying gas-solid flow in coal gasification, pharmaceutical, and other industries. ECT is also used for creating images of physically confined objects. The data collected by the acquisition system to produce images undergo blurring because of ambient conditions and the electronic circuitry used. This research includes the principle of ECT techniques for deblurring images that were created during measurement. The data recorded by the said acquisition system ascends a large number of linear equations. This system of equations is sparse and ill-conditioned and hence is ill-posed in nature. A variety of reconstruction algorithms with many pros and cons are available to deal with ill-posed problems. Large-scale systems of linear equations resulting during image deblurring problems are solved using iterative regularization algorithms. The conjugate gradient algorithm for least-squares problems (CGLS), least-squares QR factorization (LSQR), and the modified residual norm steepest descent (MRNSD) algorithm are the famous variations of iterative algorithms. These algorithms exhibit a semiconvergence behavior; that is, the computed solution quality first improves and then reduces as the error norm decreases and later increases with each iteration. In this work, soft thresholding has been used for image deblurring problems to tackle the semiconvergence issues. Numerical test problems were executed to indicate the efficacy of the suggested algorithms with criteria for optimal stopping iterations. Results show marginal improvement compared to the traditional iterative algorithms (CGLS, LSQR, and MRNSD) for resolving semiconvergence behavior and image restoration.

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Innovative Techniques For Two-Phase Flow Measurements

Cited by 42 publications

References 18 publications

Analysis of Complex Solid-Gas Flow under the Influence of Gravity through Inclined Channel and Comparison with Real-Time Dual-Sensor System

Analysis of Complex Solid-Gas Flow under the Influence of Gravity through Inclined Channel and Comparison with Real-Time Dual-Sensor System

Sensing Platform for Two-Phase Flow Studies

Iterative Algorithms for Deblurring of Images in Case of Electrical Capacitance Tomography

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