Electrical resistance tomography ERT

Various flow visualisation techniques have been utilised to obtain experimental results from local gas hold-ups and bubble size distributions (BSD) in a gas-liquid mixed tank. Particle Image Velocimetry (PIV), Phase Doppler Anemometry (PDA), Capillary suction probe (CSP), High-speed video imaging (HSVI) and Electrical Resistance Tomography (ERT) techniques have been applied. The applicability of various techniques is dependent on the location of the measurement, the physical properties of the gas-liquid flow, the gas hold-up and the size of the tank. [Pg.773]

The electrical techniques described in the paper are Electrical Capacitance Tomography (ECT) and Electrical Resistance Tomography (ERT). Both techniques used non-invasive passive metal electrodes, with low amplitude electrical excitation. The techniques are rugged, low-cost, low-impact and fast. Absolute accuracy, on the other hand, is currently not better than 5%. [Pg.825]

Two particular cases are discussed in this paper, firstly, monitoring non-conductive solid particles conveyed in a conductive fluid and secondly, pneumatic conveying of dry solid particles. The first case uses Electrical Resistance Tomography (ERT) and the second. Electrical Capacitance Tomography (ECT). [Pg.826]

Electrical Capacitance, Electrical Resistance, and Positron Emission Tomography Techniques and Their Applications in Multi-Phase Flow Systems (by Prof. L.S. Fan and Prof. Richard Williams et al.) reports three tomography measurement techniques of capacitance (ECT), resistance (ERT) and positron emission (PET), with ECT and ERT being electrical modalities and PET radioactive modality. Their applicability in imaging multiphase flow dynamics... [Pg.292]