The design of a dual-plane ERT system for cross correlation measurement of bubbly gas/liquid pipe flow

Combining electrical resistance tomography (ERT) with the cross-correlation flow measurement technique can provide more information on the flow than usual. A dual-plane ERT system for use on laboratory- and plant-scale process equipment has been developed on the basis of this idea. This paper focuses on the design of it. The principle of measurement of the local gas velocity distribution in a bubbly gas/liquid pipe flow based on pixel-pixel cross correlation of two plane images is described. Methods to improve the real-time performance of the system are also discussed in detail. Initial experimental results illustrate the feasibility of the method presented here.