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Visualisation of Bubbly Velocity Distribution in a Swirling Flow Using Electrical Resistance Tomography
Author(s) -
Wang Mi,
Lucas Gary,
Dai Yunfeng,
Panayotopoulos Nikolaos,
Williams Richard A.
Publication year - 2006
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.200601063
Subject(s) - tomography , mechanics , volume fraction , flow (mathematics) , materials science , volumetric flow rate , flow velocity , tomographic reconstruction , volume (thermodynamics) , electrical resistance and conductance , sensitivity (control systems) , inverse , physics , optics , geometry , mathematics , thermodynamics , composite material , engineering , electronic engineering
This paper describes a dual‐plane Electrical Resistance Tomography (ERT) system for measuring local air volume fraction and 3‐D velocity distribution in gas‐liquid flows. An implementation based on a so‐called ‘best‐correlated pixels' method has been developed. Applying the 3‐D velocity implementation to tomographic data sets obtained from an air‐water swirling flow, axial, angular and radial velocity profiles have been successfully extracted. With the volume fraction distribution reconstructed using the “sensitivity theory based inverse solution using conjugate gradient” (SCG) method, the dispersed phase flow volumetric rate can be obtained. The experimental results obtained using the ERT system are in good agreement with the measurements obtained using a local probing technique.