Singularity image method for electrical impedance tomography of bubbly flows
نویسندگان
چکیده
A singularity image method is applied to the electrical impedance tomography of gas–liquid flows in a two-dimensional circular domain. Algorithms that use analytic complex functions, dipoles and the Milne-Thomson circle theorem are described. Numerical experiments are provided to demonstrate the robustness of this technique. Numerical results show excellent reconstruction properties. (Some figures in this article are in colour only in the electronic version)
منابع مشابه
The Effect of Gold Nanoparticle on Electrical Impedance of Tissue on Low Frequency Ranges
Introduction: Electrical impedance of tissues on low frequencies includes useful information about functional and structural changes in tissues. This property is used in Electrical Impedance Tomography (EIT) imaging modality for the detection of lesions in tissues.Objective: The goal of this article is to study changes in electrical impedance of tissues in the presence of gold nanoparticles.Mat...
متن کاملReconstruction of gas-liquid flows using the Stochastic Estimation with a 16-channel electrode array “Bubbly flow reconstruction using the Stochastic Estimation with an electrode array”
Bubble-injection methods are considered to be a prospective approach to reduce skin-frictional drag for ships. To apply this technique for unsteady flows, we attempt to introduce a feedback loop of air injection in future applications. Hence, we wish to establish reduced order models of unsteady bubbly flows from the information at the bottom of the ship, but this must be achieved with a limite...
متن کاملMeasurement of near-wall stratified bubbly flows using electrical impedance
The impedance measurement between a pair of flush-mounted electrodes was used to measure the characteristics of a stratified near-wall bubbly flow. The variation in cross electrode impedance with liquid layer thickness and mixture void fraction was examined using numerical simulations and static experiments. The experimental realization of the measurement system was used to measure the solid fr...
متن کاملFuzzy Modeling of Electrical Impedance Tomography Images of the Lungs
OBJECTIVES Aiming to improve the anatomical resolution of electrical impedance tomography images, we developed a fuzzy model based on electrical impedance tomography's high temporal resolution and on the functional pulmonary signals of perfusion and ventilation. INTRODUCTION Electrical impedance tomography images carry information about both ventilation and perfusion. However, these images ar...
متن کاملVisualisation of Two-phase Gas-liquid Pipe Flows Using Electrical Capacitance Tomography
Electrical Capacitance Tomography (ECT) can be used to measure concentration and velocity distributions in two-phase flows. ECT is non-intrusive, and the reconstruction of the concentration and velocity distribution can be undertaken in real time and over an arbitrary number of zones in the flow cross-section. The concept of a ‘virtual instrument’ is introduced where zones of the image can be s...
متن کامل