Water Content Measurement by an Orthogonal Two-dimensional Electromagnetic Field based Microwave Sensor

In this paper, a microwave sensor based on orthogonal two-dimensional electromagnetic field is designed for measuring water content varying from 0 to 100% in gas-water two-phase flow. Two electrodes are orthogonal located inside the sensor constructing an orthogonal two-dimensional electromagnetic field, so that the sensor can identify the flow patterns of stratified flow, annular flow, wavy flow and slug flow. Based on these patterns, how does the phase of the sensor response changes with respect to a varying water content is further analyzed through simulation by COMSOL Multiphysics software. The simulation results agree well with the experiments, demonstrates the feasibility of the proposed sensor on water content measurement and flow pattern identification.