Quantitative Measurement of Two-Phase Flow by Electrical Capacitance Tomography Based on 3D Coupling Field Simulation

Measurement of oil-gas two-phase flow parameters such as Gas Void Fraction (GVF) and phase distribution plays a vital role in oil gas industries. To quantitatively evaluate the performance Electrical Capacitance Tomography (ECT) for measuring complex dynamic flows, three-dimensional fluid dynamics-electrostatic field coupling model (3D-FECM) is proposed this paper. Coupling simulation are carried out with 12-electrode ECT sensor. Utilizing 3D-FECM, flows instantaneous measurements simultaneously obtained. Two GVF measurement approaches, i.e. capacitance-based method image-based method, used to calculate GVF. The permittivity reconstructed by using Linear Back Projection (LBP) Landweber iteration. capacitances signal-noise ratios (SNRs) 40 60 dB generated comparison verification. Evaluation results show that structural similarity between ground truth images noise-free data iteration better than 0.765, while those LBP higher 0.754, noise SNR has no obvious effect on image reconstruction, full-scale error prediction noisy within -0.82% +6.09%, slightly (i.e. −1.16% +7.63%).